Integrated Investment Report · Semiconductors ② NAND·SSD

Sandisk · FADU
Two Faces of the NAND Boom: How to Read the Current Setup

As of Wed, Oct 14, 2026, after the Korean market close · FADU at the Oct 14 close, Sandisk at the Oct 13 (US) close · Prices and indicators calculated directly from Naver Finance and Yahoo Finance daily bars · Units are KRW bn for FADU and US dollars for Sandisk unless noted · USD/KRW 1,338 · Update of the Oct 13 report

00Summary at a Glance

Current read: wait-and-see bias · re-assess after earnings
Sandisk sits in a classic peak-cycle debate: record profits at a P/E of 7x as NAND prices surge. FADU has just emerged from losses and is at the start of a growth phase, but its price already reflects a distant future. In one day FADU fell more than 9%, giving back over half of its September rebound. Both companies report within 3 to 4 weeks (Oct 29 and Nov 12), so the analysis favors a staged approach: re-assess after the earnings conditions are confirmed.
  • The fundamental picture is positive. Sandisk's latest quarter: revenue of $8.97 bn (+372% year on year) and a gross margin of 84.6%. FADU turned profitable in Q1 2026, posted operating profit of KRW 16.2 bn in Q2, and Q3 consensus is KRW 33.7 bn.
  • Valuation pressure runs in opposite directions. Sandisk trades at 6.9x next-fiscal-year estimated P/E; FADU at about 61x 2026E P/E and 52x P/B.
  • Timing is unfavorable. Sandisk is down 10.7% over 5 trading days and, although the Oct 13 decline narrowed to -0.34%, sits below its 20-, 60- and 120-day moving averages. FADU fell 9.18% on Oct 14 alone and 23.8% over 5 days, lost its 60-day MA, and closed below the opens of both September base candles.
  • Next checkpoints. Oct 22 Bank of Korea rate decision (MPC); Oct 28 FOMC and SK hynix Q3 earnings; Oct 29 Sandisk FY27 Q1 earnings; Nov 12 FADU Q3 earnings; and the ongoing trial tied to FADU's IPO.

Sandisk SNDK · NASDAQ

$1,482.33▼ 5.00 (−0.34%)
Market cap
$215.4 bn
Est. P/E (FY27E)
6.9x
P/B
13.8x
Last 5 trading days
−10.7%
1-year return
+893%
Year to date
+525%
Position in 52-week range
Low 144.82High 2,354.39 (Jun 22)

FADU 440110 · KOSDAQ

KRW 66,300▼ 6,700 (−9.18%)1
Market cap
KRW 3.32 tn (about $2.5 bn)
Est. P/E (26E)
60.9x
P/B
52.0x
Last 5 trading days
−23.8%
1-year return
+179%
Foreign ownership ratio
25.7%
Position in 52-week range
Low 21,200High 129,400 (May 22)

1 FADU's change is based on the Korea Exchange regular-session daily bar (Oct 13 close KRW 73,000 → Oct 14 close KRW 66,300, −KRW 6,700, −9.18%). The Naver quote screen shows −KRW 5,100 (−7.14%) because its prior-day reference price is KRW 71,400, which differs from the regular-session close (KRW 73,000). The same gap appears in Naver's investor-type trading data on every trading day since Sep 28 (for example, Oct 13: Naver −KRW 3,900 vs daily bar −KRW 3,600), while through Sep 23 it matches the daily-bar closes. We could not determine why the reference price differs. All other FADU indicators (5-day change, moving averages, RSI and so on) are calculated from regular-session daily bars. FADU's estimated P/E is 66,300 ÷ KRW 1,088 (26E EPS) = 60.9x (the Naver screen shows N/A for estimated P/E after the close).

Sandisk was spun off from Western Digital and listed in February 2025, so its trading history is short. Market cap is calculated as 145,327,682 listed shares × closing price. Sandisk's intraday US quote on Oct 14 (about $1,431, down in the 3% range) is an unconfirmed value after the reference time and is not reflected in the figures. FADU's trading was suspended from Dec 19, 2025 to Feb 2, 2026 during the Korea Exchange's listing-eligibility review; daily bars for that period are filled with the last close. The 52-week low and high, candles, volume and RSI(14) use the latest 245 trading days of daily data.

01Who Makes What

Both are grouped under the "NAND/SSD" theme, but they do different things. Sandisk is a manufacturer that makes NAND chips itself. FADU is a fabless company that designs the controller, the brain of an SSD.

NAND makersSandisk (joint fabs with Kioxia), Samsung Electronics, SK hynix, Micron
NAND chips
SSD controllersFADU (data-center focused), Marvell, Phison and others. Large makers also design in-house
Finished SSDs
Data centersHyperscalers such as Meta and Google, and server OEMs. Storage for AI training and inference data

Division of roles

ItemSandiskFADU
Core productsNAND flash (BiCS), enterprise and consumer SSDs, memory cards, USB drivesData-center SSD controllers and SSD modules built around them
Business modelManufacturer. Profit rises directly when NAND prices riseFabless (design only). Production is outsourced to foundries
Main customersHyperscalers, PC and smartphone makers, retail distributionUS big tech such as Meta and Google, new server OEMs
Current growth driverSurging NAND prices; data-center revenue (+103% quarter on quarter last quarter)Revenue ramp from the 2nd and 3rd hyperscalers; PCIe Gen6 controller
Latest quarterly revenue$8.97 bn (FY26 Q4, to ~Jul 3)KRW 73.2 bn (Q2 2026)
Latest quarterly operating profit$7.04 bn (margin 78.5%)KRW 16.2 bn (margin 22.2%)

Is the "NAND supercycle" real?

In Sandisk's numbers, clearly yes. The catch is that two-thirds of the revenue increase came from price, which cuts both ways.

Sandisk data-center revenue
USD bn · FY26 Q4 as reported by the company; the earlier quarter is an approximation back-calculated from the quarter-on-quarter growth rate
2.5051.5FY26 3Q3FY26 4Q
FADU quarterly revenue
KRW bn · 26.3QE is Naver consensus (Eugene Investment & Securities: KRW 122.1 bn)
10020023.725.2Q25.625.3Q23.925.4Q59.526.1Q73.226.2Q121.326.3QE
ActualEstimate

02Earnings and Outlook

Sandisk went from losses right after its spin-off to a company with $12.5 bn of operating profit in a year. FADU, after three straight loss-making years, is aiming for its first annual profit in 2026. Figures beyond the latest results are broker estimates.

Sandisk operating profit
USD bn · fiscal year ending in June; FY27E is S&P consensus
2550-1.3FY23-0.4FY240.5FY2512.5FY2639.1FY27E
ActualEstimate
FADU operating profit
KRW bn · 2026E is Naver consensus (Eugene Investment & Securities: KRW 99.8 bn)
50100-58.62023-952024-65.5202592.92026E
ActualEstimate

Annual results

YearTypeSandisk revenue ($B)Sandisk operating profit ($B)FADU revenue (KRW bn)FADU operating profit (KRW bn)Backdrop
2023Actual6.09−1.3022.5−58.6NAND downturn; FADU revenue collapsed right after its IPO
2024Actual6.66−0.4443.5−95.0Early NAND recovery; FADU losses widened
2025Actual7.360.5192.4−65.5Sandisk spun off; FADU revenue doubled
2026FY actual / estimate20.25
FY26 actual
12.47
FY26 actual
392.4
Estimate
92.9
Eugene 99.8
NAND price surge; FADU turns profitable
2027Estimate49.14
Range 43.4-53.2
39.11——Sandisk FY27 (Jul 2026-Jun 2027)

Sandisk's fiscal year ends in June, so the "2026" row is FY2026 (Jul 2025-Jun 2026) actuals. Operating profit is GAAP, and FY27E is S&P Global consensus (updated Oct 9). FADU's 2026 estimate is Naver Finance consensus (generated Oct 13); 2027 consensus was not available in this pull. Neither consensus has changed since yesterday's report.

Quarterly flow: how back-loaded is the second half?

Sandisk quarterly operating profit
USD bn · FY27 Q1E is approximated at the midpoint of guidance (revenue $10.3-10.8 bn, gross margin 83-85%)
5100.1FY25 4Q0.2FY26 1Q1.12Q4.23Q74Q8.3FY27 1QE
ActualGuidance
FADU quarterly operating profit
KRW bn · 26.3QE is consensus; 26.4QE is back-calculated from the annual consensus
2550-12.625.2Q-11.425.3Q-29.525.4Q7.726.1Q16.226.2Q33.726.3QE35.326.4QE
ActualEstimate
About 74% of FADU's full-year estimate depends on the second half. First-half actual operating profit of KRW 23.9 bn must be joined by KRW 33.7 bn in Q3 and about KRW 35.3 bn in Q4 to reach KRW 92.9 bn. Eugene Investment & Securities expects Q3 operating profit of KRW 35.5 bn, above consensus, but the company's revenue fell sharply in the quarters right after its IPO, so whether the Nov 12 Q3 results match the estimates is the key checkpoint. Sandisk's gross margin last quarter was 84.6%, well above the top of guidance (79-81%); at the Oct 29 report the key items are whether NAND price increases continue and the terms of long-term supply agreements.

Recent key events

DateEventImplication
Dec 19, 2025FADU trading suspended pending a listing-eligibility reviewLinked to an indictment over alleged revenue inflation at the time of the IPO
Feb 3, 2026FADU trading resumedPassed the exchange review. Trial is ongoing
Q1 and Q2 2026FADU turns profitable (operating profit KRW 7.7 bn → 16.2 bn)First profitable quarters since the IPO
Aug 5, 2026Sandisk FY26 Q4 results beat guidanceShares fell after hours despite strong results. Expectations were high
Sep 23, 2026Eugene Investment & Securities raises FADU target price from KRW 100,000 to KRW 110,000New orders disclosed this year total over KRW 340 bn
Oct 12, 2026CXMT announces server memory plans; Sandisk −5.97%Memory stocks weak together
Oct 13, 2026KOSPI −5.46% (6,035.35); foreigners net sold KRW 4.5 tn. Sandisk −0.34%CXMT news and the AI profitability debate coincided. Sidecar (program-trading halt) triggered
Oct 14, 2026FADU −9.18% (KRW 73,000 → 66,300), KOSDAQ −1.57%, KOSPI −0.44% (6th straight decline)Reports of CXMT's 4F² server DRAM launch later this year; profit-taking after ASML's strong Q3. No FADU-specific negative news found

The CXMT news concerns DRAM and does not directly target NAND. A Korean expert assessed that mass-production yields are unproven, and Mizuho said it "changes nothing in the short term." It reaches Sandisk and FADU through memory-sector sentiment. This research found no new company-specific news on Sandisk or NAND prices between Oct 13 and Oct 14.

03How Rising NAND Prices Affect the Two Companies Differently

In the same NAND boom, Sandisk is the one that "gets the price" and FADU is the one that "follows the volume." That difference shows up in margins and in share-price volatility.

ItemSandiskFADUInterpretation
Effect of higher NAND pricesDirect beneficiaryIndirect (+/−)FADU: more controller demand (+), higher module costs (−)
Latest quarterly gross margin84.6%—Sandisk jumped from 26.4% a year earlier
Latest quarterly operating margin78.5%22.2%FADU is improving from 12.9% in Q1
Revenue growth (year on year)+372%+209%Both grew 3-5x
Debt ratio—200.7%FADU improved from 518% at end-2025. Thin equity
Impact if prices fallLargeMediumSandisk's profit tracks NAND prices almost one for one

Sandisk: joined at the hip with Kioxia

  • NAND wafers are produced at joint fabs with Japan's Kioxia. Capacity expands more slowly than at rivals, so Sandisk captures much of the price effect in an upcycle.
  • Data-center revenue was $2.98 bn, about 33% of the total. A year ago, consumer and PC had a far larger share.
  • The shift to multi-year long-term supply agreements is the core of the bull case. The terms need to be checked at the Oct 29 report.

FADU: customer count is earnings

  • Brokers explain that after the first hyperscaler (reportedly Meta), revenue from a second customer is ramping and a third customer's revenue is starting to be recognized.
  • It recently won a new server OEM customer; it has shown a PCIe Gen6 controller and cited Gen7 development spending (completion of Gen6 development is not confirmed in public sources).
  • Competitors are large makers with their own controllers, such as Marvell, Phison and Samsung. Customers must re-qualify the product with each generation.

Comparing by market cap

ItemAmountMeaning
Sandisk market cap$215.4 bn (about KRW 288 tn)About 5.5x FY27E operating profit of $39.1 bn
FADU market capAbout KRW 3.32 tnAbout 36x 2026E operating profit of KRW 92.9 bn
FADU H2 operating profit, annualizedAbout KRW 138 bn(Q3 KRW 33.7 bn + Q4 KRW 35.3 bn) × 2. Market cap is about 24x that
Market cap ratio of the twoAbout 87 : 1The operating profit ratio (FY27E $39.1 bn vs 26E KRW 92.9 bn) is about 563 : 1

Converted at USD/KRW 1,338 (Oct 14 daytime close, per Yonhap News TV). Sandisk market cap $215.4 bn = 145,327,682 shares × $1,482.33 = $215.42 bn; × KRW 1,338 ≈ KRW 288.2 tn. FADU's annualized H2 figure is a simple extension of consensus, used to gauge growth potential, not a forecast.

04Market Beliefs: How Much Holds Up?

This report was written without a separate AI conversation log, so the original report's cross-check chapter has been recast as "commonly cited claims vs. the data."

IssueCommon claimCounter-claimCheck result
Sandisk at 7x P/E"Too cheap relative to earnings""P/E is lowest at the cycle peak"Both have merit. A company that was loss-making around the spin-off reaching a 78% operating margin in a year is itself the power of the price cycle. Whether FY28 profit persists is the key
Sandisk's identity"A consumer brand that sells memory cards"—Data-center revenue doubled in one quarter to about 33% of the total. No longer a consumer-centered company
FADU credibility"A company that defrauded the IPO market""It has already cleaned up and normalized"The indictment and trial are facts and ongoing. It passed the exchange review and resumed trading on Feb 3. Profitable since Q1. Business substance is being confirmed through earnings; legal risk is unresolved
FADU valuation"61x P/E is a bubble""Cheap on second-half profit"60.9x on 2026E; market cap is about 24x annualized H2 operating profit. "Cheap" assumes growth continues
FADU Q2 net loss"The turn to profit is an illusion"—Q2 operating profit was +KRW 16.2 bn, yet net loss was −KRW 60.1 bn. Large losses arose outside operations (presumed valuation losses on financial instruments tied to the share-price rise; the quarterly report needs checking). The core business is indeed profitable, but net profit is highly volatile
Chart (technical)"The September surge was a trend reversal""A double top near the prior high"As of Oct 14, FADU is below its 20-, 60- and 120-day MAs and above the 200-day; Sandisk is the same. FADU has given up both September base candle opens. Analyzed with actual data in Chapter 7

05SWOT

Items confirmed from filings, broker reports and price data.

Sandisk

Strengths Strengths

  • Gross margin of 84.6%, well above last quarter's guidance (79-81%)
  • Large NAND capacity secured through the Kioxia joint venture
  • Sales channels across both data-center and consumer
  • FY27 Q1 guidance of EPS $44-46 signals continued growth

Weaknesses Weaknesses

  • Two-thirds of the revenue increase came from price. Vulnerable to a price reversal
  • First year after the spin-off; short track record as an independent company
  • P/B of 13.8x is a price burden against book value
  • Annual volatility of 107%

Opportunities Opportunities

  • Demand for high-capacity data-center SSDs for AI inference
  • Shift to multi-year supply agreements could reduce earnings volatility
  • Gartner: meaningful price stabilization only after late 2027

Threats Threats

  • NAND prices turning down as supply expands
  • Catch-up by China's YMTC, CXMT and others (CXMT previewed a 4F² DRAM launch later this year on Oct 10)
  • High expectations: shares fall even on strong results
  • US 10-year yield above 5%

FADU

Strengths Strengths

  • Data-center-only SSD controller technology; US big tech customers
  • New orders disclosed in 2026 total over KRW 340 bn
  • PCIe Gen6 controller unveiled, Gen7 development under way
  • Operating margin improved from 12.9% to 22.2%

Weaknesses Weaknesses

  • Short profit history: only two profitable quarters
  • Dependence on a few hyperscalers
  • Debt ratio of 200%, thin equity (BPS KRW 1,275)
  • P/E of 61x, P/B of 52x

Opportunities Opportunities

  • Revenue ramp from a third hyperscaler and server OEMs
  • AI data-center SSD refresh cycle and the Gen6 transition
  • Expansion of the module business beyond controllers

Threats Threats

  • Outcome of the IPO-related trial and management uncertainty
  • Module cost pressure from surging NAND prices
  • Large makers bringing controllers in-house
  • High KOSDAQ volatility (122% annualized)

06Is the Price Cheap?

Sandisk's price is low relative to earnings, at a cycle-peak level; FADU's earnings are still small, so its price assumes continued growth. "Cheap" and "expensive" mean opposite things for the two stocks.

MetricSandiskFADUHow to read it
Current price$1,482.33KRW 66,300
Market cap$215.4 bnKRW 3.32 tn
P/E (trailing 4 quarters)20.3xLossBased on Sandisk EPS of $73.00. FADU's trailing-4-quarter EPS is −KRW 1,985 because of the Q2 net loss
P/E (next fiscal year / this year, estimated)6.9x60.9x$1,482.33 ÷ $214.82 (FY27E, adjusted) / 66,300 ÷ KRW 1,088 (26E)
P/E (Sandisk FY28E)5.6x—EPS $266.30
P/B13.8x52.0xBPS $107.78 / KRW 1,275
ROE (2026 estimate)—77.8%FADU's equity is small, so ROE comes out large
DividendNoneNone
Average broker target price$2,173KRW 120,000+47% / +81% vs. current price
Why target prices are hard to take at face value. Sandisk's target range of $1,000-$3,600 is 3.6x wide, showing how divided views on NAND prices are. FADU's KRW 120,000 target is 110x 2026E EPS and comes from only two brokers, Eugene Investment & Securities and Shinhan Investment. Targets are unchanged from yesterday; the gap to the target widened from +64% to +81% only because the share price moved -9% in a day. With the US 10-year yield above 5%, high multiples are hard to sustain.

Price sensitivity

Stock · scenarioP/E appliedBased on estimated EPSIf EPS falls 30%Premise
Sandisk · conservative5xAbout $1,074About $752FY27E EPS $214.82. NAND prices judged to have peaked
Sandisk · neutral7xAbout $1,504About $1,053Current multiple maintained
Sandisk · optimistic9xAbout $1,933About $1,353Long-term contracts earn credit for earnings stability
FADU · conservative40xAbout KRW 43,500About KRW 30,50026E EPS KRW 1,088. Growth slows
FADU · neutral60xAbout KRW 65,300About KRW 45,700Average for high-growth fabless firms
FADU · optimistic80xAbout KRW 87,000About KRW 60,900Conviction that high growth continues in 2027

This table is not a forecast; it shows what assumptions the price rests on. Sandisk's $1,482 is near "EPS unchanged · 7x P/E," and FADU's KRW 66,300 is near "2026E EPS · 60x P/E" (yesterday it was between 60x and 80x). FADU's price is still one that requires profit to grow sharply in 2027 to be justified.

07Charts and Flows

We calculated directly from one year of daily bars. Both stocks follow the same path: a May-June peak, a late-July plunge, a September rebound and an October re-correction. Sandisk sits just above the lower Bollinger Band; FADU gave up its 60-day MA on Oct 14 and dropped to just above its 200-day MA.

Sandisk daily candles and moving averages
USD · latest 245 trading days · candles, volume, RSI(14) · hover over the chart to see values
0617.251,234.491,851.742,46925.1125.1226.0126.0226.0326.0426.0526.0626.0726.0826.0926.101,482.33Volume8.3M shRSI(14) · Signal(9)30.070.038.3
UpDown20D MA60D MA120D MAVolume 20-day avgRSI(14)Signal(9)▲▼ 교차
FADU daily candles and moving averages
KRW · latest 245 trading days · candles, volume, RSI(14) · the flat stretch is the trading suspension period
7,63339,52471,416103,307135,19825.1125.1226.0126.0226.0326.0426.0526.0626.0726.0826.0926.10Base 75,700Base 72,900Base 69,30066,300Volume454K shRSI(14) · Signal(9)30.070.042.4
UpDown20D MA60D MA120D MA▲ Dante base candle · openVolume 20-day avgRSI(14)Signal(9)▲▼ 교차

Technical indicators

IndicatorSandiskFADUInterpretation
Current price1,482.3366,300
20-day MA1,691.80 Below74,210 BelowBoth have broken their short-term trend
60-day MA1,550.01 Below68,188 BelowFADU lost the 60-day MA it had held through yesterday on Oct 14 (yesterday's close: KRW 73,000)
120-day MA1,588.43 Below79,574 BelowBoth are pressed down by the 120-day MA from above
200-day MA1,193.90 Above64,298 AboveLong-term trend intact. FADU's distance to the 200-day MA narrowed to 3.1%
RSI(14)38.342.4Down from 48.7 and 63.8 five trading days ago. Not oversold
MACD histogram−36.43−1,280Weakness widening in both (previous day −32.60, −352)
Bollinger Bands (lower to upper)1,474.59 ~ 1,909.0254,283 ~ 94,137Sandisk is just above the lower band (0.5%); FADU is below the midline
From 52-week high−37.0%−48.8%
60-day annualized volatility107%122%Daily moves of 6-10% are common

Sandisk: nearly half the rebound given back

  • From the Jun 22 high of $2,354 to the Jul 29 low of $998: −58%
  • After recovering 67% of that decline up to $1,909 on Sep 22, it turned down; it has now given back about 47% of that rebound (998 → 1,909)
  • Below the 20-, 60- and 120-day MAs. The 120-day MA is above the 60-day MA: a short-term inverted alignment
  • Support: $1,475 (Bollinger lower band) → $1,454 (50% retracement) → $1,417 (low of the week of Aug 24) → $1,401 (this week's low)
  • Resistance: $1,550 (60-day MA) → $1,588 (120-day MA) → $1,692 (20-day MA)

FADU: lost the 60-day MA, holding above the 200-day MA

  • From the May 22 high of KRW 129,400 to the Jul 29 low of KRW 46,950: −64%
  • After recovering 53% of that decline up to KRW 90,700 on Oct 2, it fell; it has now given back about 56% of that rebound (46,950 → 90,700)
  • On Oct 14 it dropped intraday to KRW 64,700 and closed at KRW 66,300. It closed below the 60-day MA (68,188), the 50% retracement (68,825) and the low of the Sep 10 base candle (67,400), and closed above the 200-day MA (64,298) and the 61.8% retracement (63,662)
  • Support: KRW 64,300 (200-day MA) → KRW 63,700 (61.8%) → KRW 60,100 (Dante's 224-day MA)
  • Resistance: KRW 68,200 (60-day MA) → KRW 72,900 (open of the Sep 10 base candle) → KRW 74,200 (20-day MA) → KRW 79,600 (120-day MA)

Investor flows

FADU foreign ownership ratioJul 15Sep 10 (20 trading days ago)NowForeign net trading, last 5 trading days (shares)Institutions, last 5 trading days (shares)20-day cumulative (foreign / institutions)
FADU27.91%26.25%25.69%+61,523 / +12,180 / +93,295 / +183,931 / +826−35,310 / +35,168 / −31,311 / −105,295 / −76,995−681,922 / +767,000

Net trading is listed in the order Oct 7, Oct 8, Oct 12, Oct 13, Oct 14 (the market was closed Oct 9). Jul 15 is the first day of the 60 trading days of data available. FADU's foreign ownership ratio fell 2.2 percentage points over three months. Foreigners kept net buying over the last 5 trading days, but Oct 14 was effectively neutral at +826 shares, and institutions turned to net selling of 76,995 shares that day, so their 20-day cumulative net buying shrank from 2.17 million shares in yesterday's report to 0.77 million. Retail investors net bought 77,980 shares the same day. Oct 14 volume of 454,314 shares was about 85% of the 20-day average (about 0.53 million), so the decline came on light trading rather than heavy panic selling. Sandisk is a US stock with no data in the same format, so we use volume instead. Its 20-day average of 8.54 million shares is below its 60-day average (12.34 million), suggesting a correction on shrinking volume rather than panic selling. Across the KOSPI market, foreigners net sold KRW 1.18 tn on Oct 14 (KRW 1,181.4 bn), a seventh straight day of net selling.

08Macro Environment

Interest rates are staying high in the 5% range. That is least favorable for high-multiple growth stocks like FADU, whose profits are concentrated in the distant future, while Sandisk is directly tied to memory-sector sentiment.

KOSDAQ index
Points · latest 245 trading days · candles, volume, RSI(14)
601.07765.64930.201,094.771,259.3425.1125.1226.0126.0226.0326.0426.0526.0626.0726.0826.0926.10823.88Volume468K shRSI(14) · Signal(9)30.070.043.6
UpDown20D MA60D MA120D MAVolume 20-day avgRSI(14)Signal(9)▲▼ 교차
Philadelphia Semiconductor Index (SOX)
Points · latest 245 trading days · candles, volume, RSI(14)
5,1997,67610,15312,62915,10625.1125.1226.0126.0226.0326.0426.0526.0626.0726.0826.0926.1012,209RSI(14) · Signal(9)30.070.046.3
UpDown20D MA60D MA120D MARSI(14)Signal(9)▲▼ 교차
IndicatorLevelImplication
KOSDAQ (Oct 14 close)823.88−1.57%. −33% from the April high of 1,229; 1.1% above the 60-day MA (815). −10.4% over 5 trading days
KOSPI (Oct 14 close)6,008.81−0.44% (Oct 13: −5.46%), 6th straight decline; foreigners net sold KRW 1.18 tn
SOX index (Oct 13)12,208.79−0.23% (Oct 12: −2.67%). −7.6% over 5 trading days. Oct 14 intraday 11,922 (about −2.3%) is unconfirmed
US 10-year Treasury5.22%Oct 13 close (Yahoo ^TNX 5.217%). Hit the 5.36% range intraday on Oct 7, the highest since the early 2000s. Oct 14 intraday 5.26% (unconfirmed)
US Fed policy rate3.75-4.00%First hike in three years on Sep 16. US September CPI due Oct 14 (US time; result not confirmed), FOMC on Oct 28
Bank of Korea policy rate3.00%Raised in both July and August. Oct 22 rate decision (forecasts are split on an October hike)
USD/KRWKRW 1,338Oct 14 daytime close (Oct 13: 1,345.1). FADU has a large share of dollar revenue, so a lower rate reduces its won-denominated results
NAND pricesAbout +100% in H1TrendForce; Q3 forecast +10-15% (rise is slowing; secondary report, original not verified)

09Conclusion: How to Read the Current Setup

Scored on five axes. The scores are the analyst's judgment based on the data in this report. The only change from yesterday is FADU's chart score (3 → 2).

AxisSandiskFADURationale
Earnings directionVery positivePositiveSandisk beat guidance last quarter. FADU is in its second profitable quarter, with profit concentrated in the second half
ValuationCheapStretchedFY27E P/E 6.9x vs. 26E P/E 60.9x
ChartWeakWeakSandisk broke the 20-, 60- and 120-day MAs. FADU broke the 60-day MA, closed below both September base candle opens, and is 3% above the 200-day MA
FlowsWeakNeutralSandisk: memory stocks sold off together. FADU: foreign net buying over 5 days (neutral on Oct 14) and institutional net buying over 20 days, but institutions net sold on Oct 14
Macro & marketWeakWeakRate-hike cycle, worsening memory-sector sentiment, KOSPI down six straight sessions
Total (out of 25)1512FADU also requires weighing trial risk separately
Conclusion
Uncertainty is too large to settle on a single judgment at this point. Sandisk is "cheap but in a peak debate"; FADU is "at the start of growth but expensive, with legal risk remaining." The analysis favors a staged approach for both: re-assess after the earnings reports due within 3 to 4 weeks. With FADU's chart signals weakening in a single day, this is one notch more conservative than yesterday's reading.
  • The good news lies in confirmed numbers. Sandisk's FY26 operating profit of $12.5 bn and FADU's first-half operating profit of KRW 23.9 bn are results, not forecasts.
  • The bad news is concentrated in this moment. Memory-sector weakness, US rates above 5% and worries about Chinese catch-up all landed in the same week. KOSPI failed to rebound on Oct 14 after falling 5.46% on Oct 13.
  • Between the two, Sandisk's price relative to earnings is overwhelmingly lower. But its profit is the quickest to shrink if NAND prices turn. FADU depends on customer-count expansion rather than NAND prices, so cycle sensitivity is lower, yet at 61x P/E even a small miss in Q3 results could mean a large drawdown.
  • Remaining uncertainty. It cannot yet be determined whether NAND prices hold through 2027, how FADU's trial will turn out, or whether FADU's 9% drop on Oct 14 had a stock-specific cause.

Conditions to check when re-assessing

What to checkPositive signalNegative signalTiming
Market stabilityKOSDAQ holds above its 60-day MA (about 815); SOX holds its 60-day MA (about 12,017)KOSDAQ breaks 800; SOX breaks 11,555 (61.8% retracement)This week
Sandisk supportSupport at $1,400-1,455 (50% retracement, this week's low), then recovery of $1,550 (60-day MA)Close below $1,400Within days
FADU supportSupport at KRW 63,300-65,200 (61.8%, 200-day MA), then recovery of KRW 68,200 (60-day MA)Close below KRW 63,300 → KRW 56,500-60,500 rangeWithin days
Rate eventsNo further hike signals from US CPI, the Bank of Korea or the FOMC; US 10-year below 5%CPI above expectations, further hike or hike signalOct 14 (CPI), Oct 22, Oct 28
Memory sectorSK hynix's Oct 28 Q3 results confirm NAND and memory demandRenewed worry about Chinese catch-up, continued foreign net sellingOct 28
Sandisk earningsRevenue of $10.5 bn or more, comment that price increases continue next quarter, more long-term contractsSlower price increases, mention of rising inventoryOct 29
FADU earningsQ3 operating profit of KRW 33 bn or more, new-customer revenue confirmedBelow estimates, shipments deferredNov 12
FADU trialReduced management riskTrial continues and IPO-related issues resurfaceOngoing

By perspective

Reading it now

Both stocks have annual volatility above 100%, so daily moves of 6-10% can occur (FADU −9.18% on Oct 14), and the analysis calls for position review that takes that range into account. For FADU, the possibility of a limit-down day from a stock-specific legal event is also worth considering.

After the checkpoints

US CPI, two rate decisions and both companies' earnings all arrive within a month. Waiting for them may mean missing part of an early rebound, but the reading can then be made with the largest uncertainties resolved.

Points for existing holders

The earnings logic is intact. However, the areas near $1,400 for Sandisk and KRW 63,300 for FADU are the lower edges of their respective Support 1 zones, which makes them price levels for position review.

Limitations of this report. This report is general analysis generated with AI assistance from public data. It is not investment advice or a recommendation to buy or sell any security, and it does not take into account any individual's assets, investment horizon or risk tolerance. The author is an AI and not a licensed investment adviser. Broker estimates can be wrong, and Sandisk prices are as of the Oct 13 US close. The content on FADU's trial is based on media reports and is not a legal judgment. Any trading decision and its outcome are the investor's own responsibility; consult a professional if needed.

10Key Support Zone Analysis

For both stocks, three support zones below the current price are identified as candidates. They were chosen where moving averages, retracement levels, high-volume candles and volume-by-price clusters overlap on the daily, weekly and monthly charts. FADU's Support 1 from yesterday (KRW 67,500-69,000) was already broken by the Oct 14 close, so all three zones were re-set lower.

StockCurrent priceSupport 1Support 2Support 3Trend-break level
Sandisk$1,482.33$1,400~1,455
about −2 to −6%
$1,280~1,345
about −9 to −14%
$1,090~1,190
about −20 to −26%
Close below $1,000
FADU66,30063,300~65,200
about −2 to −5%
56,500~60,500
about −9 to −15%
53,000~55,000
about −17 to −20%
Close below 46,950

Indicators are calculated from all daily bars since listing (Sandisk about 417 trading days, FADU 772), and the weekly and monthly bars are built by aggregating the daily bars. Sandisk's short history means the 444- and 448-day MAs do not exist yet. FADU's suspension period is filled with the last close, so its moving averages run flat through it. Sandisk's zones are nearly the same as yesterday's (only the bottom of Support 1 changed, $1,415 → $1,400). For FADU, price areas similar to yesterday's Support 2 and 3 move up one slot to become Support 1 and 2 (ranges slightly adjusted with this run's indicators), and Support 3 is new.

How the Dante technique is reflected. "Dante" is the pen name of 주식단테, a Korean stock YouTuber known for chart-based methods built on long moving averages and "base candles" (large high-volume candles that mark institutional accumulation). This report marks both Dante's 112-, 224- and 448-day averages and the 122-, 244- and 444-day averages requested for the report, and searches the daily bars directly for the signals Dante cites as evidence of "institutional accumulation," attaching a checklist for each stock. There are five criteria. ① Base candle (accumulation candle): a bullish candle with volume at least 2x the prior 20-day average and a body of 3% or more. ② Base candle open as support: whether later closes hold above that candle's open (in the Dante technique this open is treated as the big players' average cost and the reference for judging a breakdown). ③ Volume dry-up after the high-volume candle: how far the 10-day average volume after the base candle falls relative to the base candle. ④ Time correction below the 224-day MA: whether a "bowl pattern" second leg (sideways for four months or more) exists. ⑤ Suspected breakdown candle: a long bearish candle with at least 2x volume within 15% of the 52-week high. The ▲ markers and dotted lines on the chart show base candles within the last 150 trading days and their opens (orange = still holding, gray = already broken). These criteria were quantified from secondary sources that summarize the technique, not from Dante's original videos, so they may differ from Dante's own judgment.

Sandisk: from the 50% retracement to the 200-day MA

Sandisk daily candles, long-term moving averages and candidate support zones
USD · last 300 trading days · bands show Support 1, 2 and 3 candidates from top to bottom · volume and RSI(14) below
0617.521,235.041,852.562,47025.0925.1025.1125.1226.0126.0226.0326.0426.0526.0626.0726.0826.0926.101,482.33Volume8.3M shRSI(14) · Signal(9)30.070.038.3
UpDown20D MA60D MA122D MA244D MA444D MASupport zoneVolume 20-day avgRSI(14)Signal(9)▲▼ 교차
Sandisk weekly chart
Up to 70 weeks since listing · volume and RSI(14) below
0617.531,235.061,852.592,47025.0725.1026.0126.0426.0726.101,482.33Volume17.1M shRSI(14) · Signal(9)30.070.050.9
UpDown20W MA60W MASupport zoneVolume 20-week avgRSI(14)Signal(9)▲▼ 교차
Sandisk monthly chart
Since listing · volume and RSI(14) below
0617.681,235.361,853.042,47125.0425.0725.1026.0126.0426.0726.101,482.33Volume71.7M shRSI(14) · Signal(9)30.070.064.1
UpDown5M MA20M MASupport zoneVolume 20-month avgRSI(14)Signal(9)▲▼ 교차
IndicatorValueVersus current price ($1,482.33)
20-day / 60-day MA1,691.80 / 1,550.01Both above the price
122-day MA (Dante's 112-day)1,577.82 (1,625.11)Above the price
200-day MA1,193.90Below the price. Gap +24%
244-day MA (Dante's 224-day)1,018.43 (1,089.51)Below the price. Rising (+14% over 20 days)
444-day MA (Dante's 448-day)—Cannot be calculated: listing history too short
RSI(14) daily / weekly / monthly38 / 51 / 64Not oversold
Weekly 10 / 20 / 60-week MA1,644.93 / 1,657.17 / 901.60Below the 10- and 20-week MAs
Monthly 5-month / 20-month MA1,655.50 / 697.31Below the 5-month MA
20-day average volumeAbout 8.54 million sharesDown from the 60-day average of 12.34 million
ZonePrice rangeOverlapping rationale
Support 1$1,400~1,45550% retracement (1,453.83) of the rebound since the July low (998.19 → 1,909.48) · this week's low (1,401.01) · low of the week of Aug 24 (1,416.56) · low 1,449.50 of the Aug 31 high-volume bullish candle (23.38 million shares) · bottom of the $1,454-1,530 volume cluster, which holds 18.6% of rebound-period trading
Support 2$1,280~1,34561.8% retracement (1,346.30) · open 1,339.83 of the Aug 13 high-volume bullish candle (22.09 million shares) · the $1,226-1,302 volume cluster, which holds 17.7% of rebound-period trading
Support 3$1,090~1,190200-day MA (1,193.90) · open 1,135.01 of the Jul 30 high-volume bullish candle (24.40 million shares) · Dante's 224-day MA (1,089.51)
Dante accumulation/breakdown signalThis stockInterpretation
Bowl pattern position+1,036% from the 1-year low, 36.1% above the 224-day MA, 8.8% below the 112-day MACorrection after a sharp rise. The 112-day MA is already lost; the next support for the "dead-cross pullback" technique (Dante's pullback-to-long-MA method) is the 224-day MA ($1,090)
Base candle (accumulation candle)Jan 6, 2026 (open $288.74, 3.2x) · Jan 9 (open $341.60, 2.0x)Both still hold, but at about 20% of the current price they are meaningless as support zones
Base candles in last 150 trading daysNoneThe rise since February proceeded without large high-volume bullish candles
Suspected breakdown candleJan 30 long bearish candle ($651 → $576, 2.6x) and 3 others, 4 in totalHigh-volume bearish candles repeatedly appeared near highs during the climb, meaning shares changed hands often
Time correction below the 224-day MANone since listing (Feb 2025)Bowl pattern cannot be assessed
Recent volume10-day average is 63% of the 60-day averageVolume has dropped sharply in the correction. More wait-and-see than panic selling
Accumulation evidence, summarized. There is no accumulation evidence at current price levels. The only meaningful spot by Dante's criteria is the 224-day MA ($1,090) from the dead-cross pullback technique, which overlaps the bottom of Support 3. Support 1 and 2 rest on retracement and volume-cluster rationale, which is weaker than Dante-style evidence.

FADU: from the 200-day MA to the 224-day MA

FADU daily candles, long-term moving averages and candidate support zones
KRW · last 300 trading days · bands show Support 1, 2 and 3 candidates from top to bottom · volume and RSI(14) below
4,97537,56370,150102,738135,32525.0825.0925.1025.1125.1226.0126.0226.0326.0426.0526.0626.0726.0826.0926.10Base 75,700Base 72,900Base 69,30066,300Volume454K shRSI(14) · Signal(9)30.070.042.4
UpDown20D MA60D MA122D MA244D MA444D MASupport zone▲ Dante base candle · openVolume 20-day avgRSI(14)Signal(9)▲▼ 교차
FADU weekly chart
Last 70 weeks · volume and RSI(14) below
4,40837,14469,880102,616135,35225.0725.1026.0126.0426.0726.1066,300Volume1.6M shRSI(14) · Signal(9)30.070.047.7
UpDown20W MA60W MASupport zoneVolume 20-week avgRSI(14)Signal(9)▲▼ 교차
FADU monthly chart
Last 30 months · volume and RSI(14) below
2,66535,85869,050102,243135,43524.0724.1025.0125.0425.0725.1026.0126.0426.0726.1066,300Volume4.5M shRSI(14) · Signal(9)30.070.055.9
UpDown5M MA20M MASupport zoneVolume 20-month avgRSI(14)Signal(9)▲▼ 교차
IndicatorValueVersus current price (66,300)
20-day / 60-day MA74,210 / 68,188Both above the price
122-day MA (Dante's 112-day)79,234 (80,621)Above the price
200-day MA64,298Below the price. Gap +3.1%
244-day MA (Dante's 224-day)57,107 (60,063)Below the price. Rising (+8% over 20 days)
444-day MA (Dante's 448-day)37,559 (37,355)Below the price
RSI(14) daily / weekly / monthly42 / 48 / 56Neutral to leaning weak
Weekly 10 / 20 / 60-week MA70,510 / 75,605 / 53,589Below the 10- and 20-week MAs
Monthly 5-month / 20-month MA73,060 / 42,538Below the 5-month MA
20-day average volumeAbout 0.53 million sharesSimilar to the 60-day average of 0.55 million. Oct 14 volume was 0.454 million shares
ZonePrice rangeOverlapping rationale
Support 163,300~65,20061.8% retracement (63,662) · 200-day MA (64,298) · September monthly open (64,700, also matching the Oct 14 intraday low) · the price band with the most volume since the July low (61,533-65,179, 26.7%)
Support 256,500~60,500Dante's 224-day MA (60,063) · 244-day MA (57,107) · Sep 16 low (56,800, low of the week of Sep 14) and low of the week of Aug 10 (56,600) · the 57,888-61,533 volume cluster (9.8%)
Support 353,000~55,00060-week MA (53,589) · low of the week of Aug 3 (54,700). Only two rationales, and the volume cluster below is thin
Dante accumulation/breakdown signalThis stockInterpretation
Bowl pattern position+216% from the 1-year low, 10.4% above the 224-day MA, 17.8% below the 112-day MACorrection after a sharp rise (the "dead-cross pullback" zone). The distance to the 224-day MA has narrowed to less than half of yesterday's (21.9%)
Past bowl pattern126 trading days below the 224-day MA (Feb-Aug 2025)Sideways near the lows before the suspension. A price range of 86% makes it not a typical sideways pattern
Base candle ① Sep 10Open 72,900, low 67,400, volume 4.4xStarting point of the September rebound. The Oct 14 close (KRW 66,300) is below not only the open but also the low (KRW 67,400). By the Dante technique this is read as a breakdown signal for this base candle
Base candle ② Sep 23Open 75,700, volume 3.0xClosed below the open on Oct 13 and did not recover on Oct 14. By the Dante technique this is read as a breakdown signal
Volume dry-up after the high-volume candle10-day volume after Sep 10 was 26% of the base candleFit an accumulation-type pattern, but its meaning weakened as price fell below the open
Suspected breakdown candleMay 26 long bearish candle (128,600 → 116,800, 2.1x)A breakdown signal near the May high. It was followed by a 64% decline in June-July
Recent volume10-day average is 100% of the 60-day averageVolume is not drying up (106% yesterday). Selling is still being absorbed
Accumulation evidence, summarized. Of the two stocks in this report, FADU showed the clearer Dante-style accumulation signals, but it has given up, on a closing basis, both the Sep 10 base candle open (KRW 72,900) and the Sep 23 base candle open (KRW 75,700), which it was straddling through yesterday. Failing to hold a base candle's open means the September accumulation attempt failed, in Dante's principle, so the accumulation evidence is now read as weakened. The remaining Dante-style evidence is the 224-day MA (KRW 60,063) from the dead-cross pullback technique, which overlaps the top of Support 2. Support 1 rests on retracement, 200-day MA and volume-cluster evidence.

What to check when price reaches a zone

ItemWhat a pullback could look likeWhat a breakdown looks like
VolumeArrives with volume below the 20-day average (Sandisk about 8.54 million shares, FADU about 0.53 million)Breaks the bottom of the zone on volume well above average
RSIDaily RSI falls into the 30s, then reboundsWeekly RSI drops below 40, signaling a weakening trend
Candle shapeA long lower-wick candle or long bullish candle inside the zoneCloses form below the zone for two or more days
MarketStabilizes near the KOSDAQ 60-day MA (about 815) and SOX 60-day MA (about 12,017)Further sharp index decline. Individual supports break easily when indices plunge
Limitations of this chapter. This is general analysis summarizing where chart supports overlap; it is not investment advice tailored to any individual. The claim that price is highly likely to bounce when it touches a moving average is not a verified statistic. Price may bounce without reaching any of the three zones, or break through all of them. Both stocks can move 10-20% in a day around earnings releases, which weakens the meaning of technical zones before and after the report.
Disclosure. The author did not hold any of the securities mentioned at the time of writing. The author may buy or sell these securities in the future for personal investment purposes. The author does not offer any paid service (subscriptions, paid signals, or one-on-one advice).