Published: October 25, 2026 at 06:40 AM

Weekly Market Memory

2026-W43

2026-10-19 ~ 2026-10-25

Weekly Market Memory

2026-W43 · 2026-10-19 ~ 2026-10-25

S&P 500 weekly return

-0.47%

1. Weekly Summary

The Upside

An oversold bounce in semiconductors and falling oil prices lifted the indexes over the first three sessions. On 10-19 the Nasdaq rose +1.11% and SMH gained +1.61%, ending W42's eight-session losing streak. WTI fell to $97.15 on 10-21, easing inflation worries, and SpaceX earnings revived expectations for AI infrastructure demand, lifting the S&P 500 to 7,757.17 for a third straight gain. The VIX closed at 16.68 that day, its low for the week. After tech cracked, money still did not leave the market. It rotated. The Russell 2000 held in positive territory at +2.00% and the Dow at +0.41%, while energy (XLE +1.60%) and healthcare (XLV +1.45%) led the sector table. The 10-year yield slid from 5.10% to 4.99%, closing below 5%, and TLT rose +1.61%. HYG held up at +0.25%, so AI credit worries did not spread across high yield.

The Friction

The downside driver was the view that "too much is being spent on AI." After the close on 10-21, Meta beat earnings but raised its capex guidance and posted its first free-cash-flow deficit in more than a decade, and the stock fell -6.98% on 10-22. That same day Lam Research dropped -11.76%, SMH -5.99% and the Nasdaq -2.60%, its biggest one-day decline since June. The yardstick shifted from earnings to the return on spending. Oil compounded the pressure. A Houthi attack on Saudi Arabia, a U.S. order for Saudi-based staff to leave and the Revolutionary Guards' claimed attack on a tanker pushed Brent up to $116.72 (+6.24%). On 10-23 the selling spread to cyclicals and the Dow fell -1.23%. Safe havens offered no refuge either. Gold futures fell -4.14%, silver -5.76% and gold miners (GDX) -8.56%. The shock was bigger in Asia: the KOSDAQ fell -5.42%, the Hang Seng -4.52% and the Nikkei -4.03%, and the S&P 500 declined for a second straight week.

Outlook

The next inflection points are bunched into 10-28. The FOMC decision lands the same day as Microsoft and Alphabet earnings, with Amazon following on 10-29. The market's base case is a Fed hold, but the odds of a December hike range from 75% to 94% depending on the report. If the statement strongly signals a December hike, the 10-year yield could push back above 5%. If the capex scrutiny Meta faced spreads to other Big Tech names, a sell-off like 10-22 could repeat. Conversely, if cloud revenue justifies the spending, semiconductors, where the Trail buffer has already turned negative, could stage an oversold bounce.

S&P 500

-0.47%

NASDAQ

-0.71%

KOSPI

-2.08%

VIX

-2.70%

2. Last Week's Outlook Review

Prior-week outlook	Actual result	Verdict
Whether a second shock hits Asian semiconductors. If foreign net buying continues it is treated as a flows shock; if not, KOSPI retests last week's low of 5,450.81	After a +1.76% rebound on 10-19, the index fell twice: -3.73% on 10-20 and -3.52% on 10-22. Foreign investors sold again on 10-22 and 10-23. KOSPI broke below 5,450 with an intraday weekly low of 5,305.98 and ended the week at 5,550.30 (-2.08%); the KOSDAQ fell -5.42%	Hit
How far AI credit worries spread. If HYG holds and hyperscaler capex is maintained, semiconductors bounce from oversold levels; if HYG slips, the stress spreads to large-cap funding	HYG held at 77.05 (+0.25%) and there was no credit contagion. Semiconductors bounced early in the week (SMH 556.70 on 10-21), but when Meta raised capex it triggered "overspending" selling, and SMH ended at 527.20 (-2.33%)	Partial hit
Mixed signals from inflation and rates. If stocks rebound, yields rise again, and whether the 10-year breaks back above 5.2% caps the growth-stock bounce	The 10-year's high for the week was 5.15%, short of 5.2%, and it ended lower at 4.99% (-2.16%). The Nasdaq still fell -0.71%. What held back the growth-stock rebound was doubt about AI profitability, not yields	Miss
Durability of the defensive rotation. If a semiconductor rebound starts, the gap could close quickly, so watch SMH relative to XLE	The semiconductor rebound did not hold and the rotation persisted. XLE rose +1.60% and SMH fell -2.33%, widening the gap for another week, while XLV +1.45% and XLU +0.83% were also positive	Hit
Bank of Korea likely to hold its base rate at 3.00%	Held at 3.00% on 10-22. It was read as hawkish, however, and KOSPI fell -3.52% the same day	Hit
Risk: AI credit crunch spreads to high yield, with HYG down 1% or more and the VIX above 25	HYG rose +0.25%, the VIX peaked at 20.66 for the week and closed at 19.45, so the conditions were not met	Miss
Risk: Brent settling at $110 raises inflation and tightening pressure and pushes the 10-year back above 5.3%	Brent ended at $116.72 (+6.24%) with a weekly high of $117.41, settling above $110. The 10-year instead fell to 4.99%	Partial hit
Risk: A second leg down in Korea breaks 5,450 and the won's strength fades	KOSPI broke 5,450 intraday at 5,305.98, but the lowest close was 5,533.77. The won strengthened further, with USD/KRW at 1,325.40 (-1.16%)	Partial hit
Risk: Hawkish FOMC signal	The FOMC meets 10-27~28, so this cannot be assessed yet	Not yet assessable
Risk: Tariff grace period expiry (11-10) and the midterm elections (11-03)	Not yet arrived	Not yet assessable

Overall: We called the second Asian shock and the persistence of the defensive rotation correctly, but missed on both paths that attributed the decline to credit and rates. What weighed on tech this week was a profitability question, "can AI spending be recouped?", while credit spreads and the 10-year yield actually stabilized.

3. Portfolio Drift & Risk

Weekly Portfolio Drift

Stocks and bonds moved in opposite directions for a second straight week. The correlation between SPY and TLT on daily returns is -0.56. On 10-22, the tech sell-off day, SPY fell -1.18% while TLT rose +1.87%, its biggest gain of the week. Gold was the oddity. In a risk-off setting GLD moved in the same direction as SPY (correlation 0.88) and fell -2.63% on 10-22 alone. The dollar index barely moved at -0.03%, so dollar strength does not explain it. One interpretation is liquidation selling to cover tech losses, but that causal link is unconfirmed. Energy moved independently of equities (correlation -0.06). Still, against Brent's +6.24%, XLE rose only +1.60%, failing to capture the full oil gain, largely because XLE also fell -0.87% on the 10-22 tech sell-off.

Equities (SPY)

-0.43%

Fixed Inc (TLT)

+1.61%

Gold (GLD)

-4.03%

Energy (XLE)

+1.60%

Risk Analysis

VIX (fear gauge)

19.45

10Y Treasury yield

4.99%

Max weekly drawdown

-1.72%

2-week cumulative S&P

-2.40%

Regime

risk_off

Weekly Detail by Asset Class

Asset class	Representative ticker	Weekly return	Notes
Equities	SPY	-0.43%	QQQ -0.76%. With the Russell 2000 at +2.00% and the Dow at +0.41%, only large-cap tech was weak
Fixed Income	TLT	+1.61%	10-year at 4.99% (-2.16%), 30-year at 5.32% (-2.21%). +1.87% on 10-22 alone
Gold	GLD	-4.03%	Gold futures at $4,007.90 (-4.14%), touching the $4,000 level. Silver -5.76%, GDX -8.56%
Energy	XLE	+1.60%	Brent at $116.72 (+6.24%), WTI at $103.27 (+1.83%). +2.60% on 10-23 alone

Reading the Risk Indicators

Indicator	Value	Meaning/context
VIX (fear gauge)	19.45 (prior week 19.99, weekly range 16.51~20.66)	Slightly above the normal range of 12~18. The tech volatility index VXN rose to 28.30 (+4.31%), widening its gap with the VIX, so anxiety concentrated in the Nasdaq
10Y Treasury yield	4.99% (prior week 5.10%, weekly range 4.94~5.15%)	Closed below 5%. On the 10-22 tech sell-off the yield fell -3.88% in a day to 4.95%, a decline driven by safe-haven demand
Max weekly drawdown	S&P 500 -1.72% (10-21 7,757.17 → 10-23 7,623.68)	The Nasdaq fell -2.80% over the same stretch, and SMH fell -5.99% on 10-22 alone
2-week cumulative S&P	-2.40% (7,811.54 → 7,623.68)	Second straight weekly decline after W42's -1.95%
Regime	risk_off (mild)	The VIX is below 20, but VXN is 28.30, selling is concentrated in tech, long-dated bonds rose, and gold and silver fell together. Credit is stable, with HYG at +0.25%

4. Sector Performance

Energy · XLE +1.60%No. 1. Brent +6.24% on the Houthi attack on Saudi Arabia, the U.S. order for Saudi-based staff to leave and the Revolutionary Guards' claimed tanker attack. +2.60% on 10-23 alone amid the cyclical sell-off

Healthcare · XLV +1.45%No. 2. A record high on 10-20 with a +2.37% one-day gain. Eli Lilly provided support near its 52-week high

Real Estate · XLRE +0.97%No. 3. The 10-year fell below 5%, easing the rate burden. Rose sharply during the 10-20 rotation

Utilities · XLU +0.83%Drew defensive demand with a +2.07% gain on the 10-22 tech sell-off

Materials · XLB +0.77%Positive despite the slump in gold miners. Copper futures -0.77%

Consumer Staples · XLP +0.73%Jumped +3.31% on 10-22 (P&G beat earnings), then gave back much of it with -1.92% on 10-23 on oil costs

Financials · XLF +0.68%Joined the defensive rotation with +1.09% on 10-22, but was pushed lower by the 10-23 cyclical sell-off

Consumer Discretionary · XLY +0.57%-1.66% on 10-23 as oil rose

Technology · XLK -0.13%Rose +2.76% through 10-21, then gave it all back with -3.29% on 10-22

Industrials · XLI -1.87%Third from the bottom. Down 2.2% over the two days of 10-22 and 10-23. Higher oil raised transport costs, and the 3x defense ETF DFEN fell -9.77% for the week

Semiconductors · SMH -2.33%Second from the bottom. -5.99% on 10-22. Meta's capex increase fed "overspending" worries, and Lam Research (-11.76%) and AMD (down in the 8% range) fell with it

Communication Services · XLC -4.36%Worst. Meta fell -6.98% on 10-22 on its cash-flow deficit, compounded by Netflix's below-consensus guidance and Alphabet's weakness, with four down days out of five

Summary: Eight of the top sectors finished positive, while the bottom four were Communication Services, Semiconductors and Technology, all tied directly to AI capex, plus oil-sensitive Industrials. If W42 was about "AI credit worries," W43's selling logic shifted to "doubt over recouping AI spending."

5. The Week at a Glance

Dates are U.S. trading days. Figures are closing levels for the day.

Date	Market summary	S&P 500	NASDAQ	VIX	WTI	Regime
10-19 (Mon)	Oversold bounce after eight straight down sessions in semiconductors (SMH +1.61%). KOSPI also +1.76%	7,690.73 (+0.41%)	26,430.89 (+1.11%)	18.44	$103.66	neutral
10-20 (Tue)	Rotation into healthcare at a record high and the Russell 2000 (+1.65%). Nasdaq flat, KOSPI -3.73%	7,712.57 (+0.28%)	26,424.82 (-0.02%)	17.31	$101.79	neutral
10-21 (Wed)	Third straight gain on lower oil and SpaceX earnings. KOSPI +3.29% with a buy-side sidecar	7,757.17 (+0.58%)	26,702.86 (+1.05%)	16.68	$97.15	neutral
10-22 (Thu)	SMH -5.99% on Meta's cash-flow deficit, Brent at $113. KOSPI -3.52% after the BOK hold	7,663.43 (-1.21%)	26,008.86 (-2.60%)	19.03	$99.47	risk_off
10-23 (Fri)	Brent at $116.72 on the Revolutionary Guards' claimed tanker attack. Selling spread to cyclicals, with the Dow -1.23%	7,623.68 (-0.52%)	25,955.34 (-0.21%)	19.45	$103.27	risk_off
10-24 (Sat)	Weekend closure. 10-23 close carried over	7,623.68	25,955.34	19.45	$103.27	risk_off
10-25 (Sun)	Weekend closure. 10-23 close carried over	7,623.68	25,955.34	19.45	$103.27	risk_off

6. Trading Signal Changes

Start-of-Week vs. End-of-Week Signal Comparison

Start of week is as of 10-19 and end of week is as of 10-23.

ETF	Asset class	Start-of-week entry condition	End-of-week entry condition	Change	End-of-week Trail buffer
SPY	Core	Met	Met	→	27.23%
QQQ	Core	Met	Not met	↓ (lost 10-23)	22.34%
XLK	Core	Met	Not met	↓ (lost 10-22)	20.15%
SMH	Theme	Not met	Not met	→	-1.53%
AIPO	Theme	Not met	Not met	→	-10.93%
BOTZ	Theme	Not met	Not met	→	-0.79%
EWY	Theme	Not met	Not met	→	-11.52%
ROKT	Theme	Not met	Not met	→	-7.25%
XLE	Theme	Met	Met	→	19.44%
XLV	Theme	Met	Met	→	18.37%
CPER	Commodities	Met	Not met	↓ (lost 10-20)	9.08%
DBB	Commodities	Not met	Not met	→	8.15%
GLD	Safe haven	Not met	Not met	→	-3.30%
TLT	Safe haven	Not met	Not met	→	9.10%

Single stock	Start-of-week entry condition	End-of-week entry condition	Change	End-of-week Trail buffer
AAPL	Met	Met	→	28.86%
MSFT	Met	Met	→	25.17%
NVDA	Met	Not met	↓ (lost 10-21)	16.68%
META	Met	Met	→	12.41%
MU	Not met	Not met	→ (lost 10-19)	-0.05%
TSLA	Not met	Not met	→	12.10%
AMZN	Met	Not met	↓ (entered 10-19, lost 10-22)	16.35%
GOOG	Met	Not met	↓ (entered 10-19, lost 10-20)	8.54%
AVGO	Not met	Not met	→	-4.79%
LLY	Met	Met	→	26.39%
SPCX	—	—	—	-4.63%

Rebalancing Actions

QQQ / XLK

Hold, halt new entries

Both lost their entry conditions this week. With Trail buffers of 22.34% and 20.15% still ample, there is no basis to dump existing holdings. We will not add exposure until Microsoft and Alphabet earnings on 10-28 show returns relative to capex.

-0.76% / -0.13%

SPY

Hold

The entry condition and the 27.23% Trail buffer were maintained. Market breadth is not bad, as shown by the Russell 2000's +2.00%, so we keep the core allocation.

-0.43%

Weekly Signal Events

New entry conditions met: AMZN (10-19), GOOG (10-19)
Entry conditions lost: MU (10-19), CPER (10-20), GOOG (10-20), NVDA (10-21), XLK (10-22), AMZN (10-22), QQQ (10-23)
Entering the Trail danger zone: no newly entered names. GOOG is closest to 5% at 8.54%
Below the stop line (Trail buffer turned negative): SMH (10-22, -2.10%), MU (10-22, -1.73%), BOTZ (10-22, -1.61%)
Sharp Trail drop: META (20.46% → 12.41%, 5.82 percentage points on 10-22 alone)

Weekly Discussion Review

The subsequent weekly move is the change from the prior trading day's close referenced by the discussion to the 10-23 close.

Date	Ticker	Verdict	Headline	Subsequent weekly move	Review
10-19	MU	SKIP (0.0, HIGH, prior discussion reused)	Trail buffer of 0.05% falls far short of the 4% threshold. This signal will not be executed. (Trail 0.05%)	-0.15% (rose +3.96% through 10-21, then -2.55% on 10-22)	Correct. Had we entered, the Trail buffer would have fallen to -1.73% on 10-22 and hit the stop. The entry condition was also lost the same day

Strategy Perspective: Weekly Wrap-Up

This week's signals moved in one direction. There were only two new entries, AMZN and GOOG, and both were lost within three days. By contrast there were seven exits (QQQ, XLK, NVDA, AMZN, GOOG, MU and CPER), concentrated in core indexes and mega-caps tied directly to AI. Most Trail buffers are still above 15%, so it is not yet time to clear holdings, but the disappearance of new entry signals means the uptrend has lost momentum. The names that kept their entry conditions throughout were SPY, XLE, XLV, AAPL, MSFT, META and LLY, centered on defensives and energy that stayed out of the AI spending debate. There was one discussion, and it reaffirmed the same lesson as W41 and W42: holding off on candidates with a Trail buffer below 4% was the right call.

7. Weekly Sentiment Flow

Verdicts normalize each daily's "overall mood" and per-subreddit distribution into bullish/bearish/neutral/mixed.

Date	Reddit verdict	Key topics
10-19 (Mon)	Neutral	Post bodies not obtained, mention counts only. Attention shifted to index ETFs, MU and NVDA mentions rose, CoreWeave mentions fell, crypto interest dropped sharply
10-20 (Tue)	—	Report not generated
10-21 (Wed)	Mixed	Posts showing losses on the neocloud slump, cynicism toward Goldman's CoreWeave buy upgrade, distrust of the oil decline, bets on SpaceX earnings
10-22 (Thu)	Mixed	Meta earnings and stock split, Tesla–SpaceX merger review, Anthropic's first-half net loss, Ken Griffin's "AI bubble" remarks
10-23 (Fri)	Bearish	Complaints about losses in the AI and semiconductor dump, semiconductor equipment stocks down 50% from their highs, U.S. withdrawal of Saudi-based staff, 10-year at 5%
10-24 (Sat)	Bearish	Meta's capex increase and cash-flow deficit, Lam Research's comments on supply constraints, oil at $115, self-deprecating "worst week of my life" posts
10-25 (Sun)	Bearish	Doubts over recouping AI investment (GPU idle-time survey), Brent at $117 and the strategic petroleum reserve, fears of renewed Iran clashes, Bitcoin falling below $80,000

Weekly trend: The community stayed mixed even during the early-week rebound and hardened into bearishness for three straight days after the 10-22 tech sell-off. The debate moved from W42's "can AI investment be financed with debt?" to "can AI investment be recouped?" The timing of the bearish turn coincides with QQQ, XLK and AMZN losing their entry conditions (10-22~23). A small minority still argues for buying the dip, but most comments rebut them, so it is hard to call this a capitulation signal yet.

8. Daily Summaries

Date	Day	One-line summary	Link
10-19	Mon	Reflects the 10-16 close. Nasdaq's weekly -4.48% was its worst since June, S&P 500 at 7,659.44, VIX at 19.99. KOSPI rebounded for the first time in eight sessions to 5,668.05 (+2.05%)	Daily report
10-20	Tue	Report not generated	—
10-21	Wed	The 10-20 rotation. S&P 500 at 7,712.57 (+0.28%), XLV +2.37% to a record high, Russell 2000 +1.65%. KOSPI at 5,552.74 (-3.73%)	Daily report
10-22	Thu	Third straight gain on 10-21. Nasdaq at 26,702.86 (+1.05%), with SpaceX earnings reviving AI infrastructure expectations. KOSPI at 5,735.66 (+3.29%)	Daily report
10-23	Fri	On 10-22, Meta's cash-flow deficit sent the Nasdaq -2.60% and SMH -5.99%. Brent at $113.17 (+4.00%). KOSPI -3.52% after the BOK hold	Daily report
10-24	Sat	On 10-23, the claimed tanker attack lifted Brent to $116.72 (+3.14%), the Dow fell -1.23% and XLE rose +2.60%. S&P 500 down two weeks in a row	Daily report
10-25	Sun	Weekly wrap: S&P 500 -0.47%, Nasdaq -0.71%, Russell 2000 +2.00%. KOSDAQ -5.42%, gold futures at $4,007.90 (-4.14%)	Daily report

9. Next Week's Outlook

Key Scheduled Events

10-26 (Mon): Asian open. Watch whether KOSPI and the Nikkei price in the Brent surge and cyclical sell-off from the 10-23 U.S. session
10-27~28: FOMC (decision 10-28 at 14:00 ET). Odds of a hold are 83~85%, while the odds of a December hike range from 75% to 94% depending on the report
10-27~28: SK hynix third-quarter earnings and shareholder returns (dates differ by report). A scale of KRW 30 trillion or more is being discussed
Around 10-28: Microsoft and Alphabet earnings (schedules conflict across sources). 10-29: Amazon earnings
Sometime next week (date unconfirmed): U.S. September PCE. Expected at about 3.7% year over year
Later: 10-30 BOJ decision, 11-03 U.S. midterm elections, 11-07 first Russian diesel cargo arrives in New York, 11-10 U.S.–China tariff grace period expires

Key Things to Watch

The FOMC statement's December signal: With a hold as the base case, the wording matters more than the decision. A strong signal of a December hike would push the 10-year, at 4.99%, back above 5% and add pressure on tech, where VXN stands at 28.30. A weak signal would extend this week's TLT +1.61% trend.
The Big Tech capex verdict: Meta fell -6.98% on a cash-flow deficit despite strong earnings. If Microsoft, Alphabet and Amazon justify spending with cloud revenue, SMH could rebound from 527.20; if they only raise spending, a sell-off like 10-22 could repeat.
The gap between oil and energy stocks: Brent is at $116.72 (+6.24%) while XLE rose only +1.60%. This suggests the market sees the oil spike as a temporary risk premium. If Brent settles above $120, both a re-rating of XLE and a revision to the inflation path would follow.
Whether Korean flows have bottomed: KOSPI is at 5,550.30 with a weekly intraday low of 5,305.98. The key is whether SK hynix earnings and shareholder returns turn foreign investors into net buyers. With the KOSDAQ weaker at -5.42%, we also watch whether outflows from small and mid-caps continue.

Risk Factors

A hawkish FOMC coinciding with a PCE beat: If a December hike signal is paired with PCE at 3.7% or higher, the 10-year would return above 5% and Nasdaq losses would deepen again. The dynamic in which falling yields offset part of this week's equity losses would disappear.
Escalation in Hormuz and Saudi Arabia: If the tanker attack is confirmed or clashes at Saudi facilities continue, Brent would approach its April high of $126.41 (per reports). Re-accelerating inflation and a cyclical sell-off would arrive together.
Spread of the AI spending verdict: If Big Tech earnings fail to show returns relative to capex, selling in semiconductors and equipment stocks would resume and spread to Korea, Taiwan and Japan, which have large semiconductor weightings. This week's KOSDAQ -5.42% and Nikkei -4.03% are precedents.
Simultaneous exit from safe havens: If gold futures break the $4,000 level and Bitcoin breaks $80,000 together, leverage liquidation could follow. This week's gold -4.14% and Bitcoin -2.07% signal that hedging assets are not working in a risk-off setting.
Midterm elections and tariff expiry: Iran policy could change direction around the 11-03 election, and news of replacement tariffs before the 11-10 grace-period expiry could raise volatility in semiconductors and exporters.

This Week's Q&A

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