Stock market week Oct 26–30, 2026: AI costs hit tech

Five lessons from a divided market

The S&P 500 lost 0.57% and the Nasdaq 2.00%, while the DAX gained 2.53%. US technology weakness did not produce a worldwide weekly loss.
Friday changed the risk picture. SMH fell 6.98% in one session but only 0.89% over the week. Both windows matter.
Alphabet fell 12.61%; Vertiv gained 19.65%. The same investment cycle can drain the buyer’s cash flow while filling the supplier’s order book.
The Fed held rates, with two votes for a hike. Falling ten-year yields therefore do not establish a monetary-policy pivot.
WTI rose to $104.12. Higher energy costs and heavy AI investment compete for margins, liquidity and investors’ patience.

The week points to selective rotation, not the end of AI demand—and not an all-clear after Friday’s selloff.

Weekly gains can conceal a weak Friday

Weekly returns compare final closes with the previous week’s close; Friday returns cover only the last session. Europe’s lead and US small-cap resilience survived over the week despite a weak finish.

Swipe horizontally to view the full chart.

Market / instrument	Close	Week	Friday
S&P 500	7,580.07	-0.57%	-1.82%
Nasdaq Composite	25,437.00	-2.00%	-2.86%
Dow Jones	51,770.31	-0.85%	-1.09%
Russell 2000	2,811.84	+1.29%	-1.66%
DAX	25,818.21	+2.53%	-0.85%
Euro Stoxx 50	6,131.31	+1.04%	-1.22%
Stoxx 600	646.75	+1.73%	-0.36%
Nikkei 225	63,290.11	+0.95%	-2.12%
KOSPI	5,730.74	+3.25%	-3.48%
Hang Seng	23,294.42	+0.87%	+1.46%

S&P 500

Close7,580.07

Week-0.57%

Friday-1.82%

Nasdaq Composite

Close25,437.00

Week-2.00%

Friday-2.86%

Dow Jones

Close51,770.31

Week-0.85%

Friday-1.09%

Russell 2000

Close2,811.84

Week+1.29%

Friday-1.66%

DAX

Close25,818.21

Week+2.53%

Friday-0.85%

Euro Stoxx 50

Close6,131.31

Week+1.04%

Friday-1.22%

Stoxx 600

Close646.75

Week+1.73%

Friday-0.36%

Nikkei 225

Close63,290.11

Week+0.95%

Friday-2.12%

KOSPI

Close5,730.74

Week+3.25%

Friday-3.48%

Hang Seng

Close23,294.42

Week+0.87%

Friday+1.46%

Calculation: (October 30 close ÷ October 23 adjusted close − 1) × 100. Percentages are rounded. Index observations follow the supplied series; the DAX is the conventional performance-index series. Time zones and differing index methodologies limit direct comparability.

Swipe horizontally to view the full chart.

Market / instrument	Close	Week	Friday
QQQ	690.49	-1.97%	-3.47%
SMH	522.49	-0.89%	-6.98%
XLE	70.02	+1.00%	+1.91%
TLT	81.84	+0.61%	+0.43%
WTI	104.12	+0.82%	+2.08%
Gold	3,898.90	-2.72%	-3.29%
DXY	101.88	+0.07%	-0.16%

QQQ

Close690.49

Week-1.97%

Friday-3.47%

SMH

Close522.49

Week-0.89%

Friday-6.98%

XLE

Close70.02

Week+1.00%

Friday+1.91%

TLT

Close81.84

Week+0.61%

Friday+0.43%

WTI

Close104.12

Week+0.82%

Friday+2.08%

Gold

Close3,898.90

Week-2.72%

Friday-3.29%

DXY

Close101.88

Week+0.07%

Friday-0.16%

Indices in points; ETFs and US shares in USD; WTI in USD/barrel; gold in USD/troy ounce. Futures returns refer to the supplied contract series, not an investable total return.

Six transmission channels, not one market story

AI demand → higher investment → less free cash flow → tougher valuation of the buyers.

Data-center construction → demand for power and cooling → Vertiv orders and revenue → stronger guidance.

Intel’s weak PC outlook → doubts about hardware demand mix → semiconductor selling → pressure on SMH and NVIDIA.

Sticky inflation → Fed hold with hawkish dissent → no assured rate-cut bridge → a high bar for expensive growth stocks.

Risk aversion → demand for government bonds → lower yields → valuation relief that cannot fully offset operating concerns.

Renewed shipping risk → higher oil risk premium → stronger producer revenue prospects, higher costs for consumers and energy-intensive firms.

These chains describe plausible mechanisms, not a measurable share of each price move attributable to one headline. Positioning, expectations and liquidity can amplify or reverse the response.

Rates: lower market yields, no inflation all-clear

Fed: a hold with resistance

On October 28 the Fed kept its target range at 3.75–4.00%. Two members preferred a 25-basis-point increase. The decision should not be read as a promise of imminent easing. [1]

The first estimate put third-quarter US real GDP growth at 3.4% annualized. September PCE inflation was 3.6% year on year; the core measure excluding food and energy was 3.1%. Growth and inflation leave little room for premature policy relief. [2, 3]

The ten-year Treasury yield nevertheless fell from 4.988% to 4.929%, a decline of 5.9 basis points. TLT, a long-duration Treasury ETF, gained 0.61%, while the dollar index was almost unchanged at +0.07%. That is consistent with hedging and lower risk appetite, but does not prove the motive for buying—or whether the yield curve steepened or flattened. A comparable short-term yield is not included here.

Europe and Japan: unchanged rates, changing risks

The ECB kept its deposit rate at 2.50% on October 29. It emphasized energy-driven upside inflation risks and downside growth risks. The euro area’s preliminary third-quarter GDP growth was 0.4% quarter on quarter—not annualized and therefore not directly comparable with the US 3.4% figure. [4, 5]

The Bank of Japan left its overnight-rate target near 1.25% on October 30; one member preferred 1.50%. It also decided to accelerate ETF sales from January 2027. That changes marginal equity supply, not necessarily Japan’s entire liquidity regime overnight. [6]

What would challenge the thesis

Sustained relief requires easing price pressure, not merely one bond-rally session. Renewed energy inflation or strong wage data would challenge hopes for lower discount rates.

AI earnings: demand is not the same as shareholder return

Free cash flow generally means operating cash flow less investment in property and equipment. Company definitions may treat leases and other adjustments differently. Quarterly, trailing-twelve-month and adjusted measures are therefore identified separately below.

Alphabet: growth cannot substitute for cash

Observation

Alphabet reported quarterly revenue of $127.58bn on October 28, up 25% year on year. Google Cloud grew 103%. But operating cash flow of $42.29bn faced $51.355bn of property-and-equipment purchases: roughly $9.07bn of negative free cash flow. Results also included an $8.664bn loss on equity securities. [7]

Interpretation

The 12.61% weekly fall is consistent with a reassessment of funding and returns on capital. Investment losses are not the same as operating weakness: they distort net income, while capital spending ties up actual cash. The key question is how quickly new capacity earns an economic return.

Microsoft: a stronger cash-flow bridge

Observation

Microsoft generated fiscal first-quarter revenue of $92.3bn, up 19%, with Azure growing 48%. Operating cash flow of $58bn and free cash flow of $18.6bn provide a buffer, despite $45.2bn of investment including finance leases. The stock lost 0.50% over the week. [8]

Interpretation

The distinction is not “AI good” versus “AI bad,” but growth with sustainable funding versus growth requiring ever more external capital. Microsoft still faces utilization, power-cost and depreciation risks.

Amazon: strong AWS, heavier funding needs

Observation

Amazon reported quarterly revenue of $201.9bn on October 29; AWS grew 39% to $46bn. Trailing-twelve-month operating cash flow was $168.3bn, but free cash flow was negative $42.4bn. These cash-flow figures are not quarterly measures. The stock fell 3.08% over the week. [9]

Interpretation

Cloud demand supports the revenue thesis, not automatically the valuation. When spending precedes revenue, the path to distributable cash lengthens. Better cash conversion despite expansion would be a meaningful counterargument.

Vertiv and Intel: different economics within the hardware complex

Vertiv increased quarterly revenue 61% to $4.313bn, while organic orders more than doubled. It raised its annual revenue-guidance midpoint to $14.65bn and reported $652m of adjusted quarterly free cash flow. That provides operating support for the 19.65% weekly gain, but no protection against reversals: the stock fell 5.46% on Friday. [10]

Intel guided fourth-quarter revenue to $15–16bn and adjusted earnings per share to $0.25. Adjusted gross margin is expected to fall from 44.1% in Q3 to 38%. Strong AI infrastructure demand does not protect every PC or semiconductor business. SMH’s 6.98% Friday loss illustrates broader selling, not identical operating conditions across its holdings. [11]

Meta fell 4.30% this week. Its October 21 earnings release belongs to the previous week, however, and is not a new event in this reporting period. The price move is therefore not presented as an immediate reaction to a fresh earnings release.

Global rotation: Europe holds up, Asia’s chip rally is tested

The DAX and Stoxx 600 gained 2.53% and 1.73%. Corporate earnings supported Europe’s early-week recovery. On Friday, AI concerns reached European technology shares too. Regional outperformance is not evidence of immunity; it is initially a result of different market weights and earnings exposure. [12]

The KOSPI gained 3.25% despite losing 3.48% on Friday. Strong SK Hynix results supported Korean semiconductor shares around midweek. The Nikkei also finished positive at +0.95%, despite Friday’s 2.12% decline. The Hang Seng gained 0.87% for the week and 1.46% on Friday, offering a counterpoint without an asserted, unverified single cause. [13]

Oil: a modest weekly gain with outsized margin implications

WTI rose 0.82% over the week to $104.12, including a 2.08% Friday gain. Reuters linked the move to renewed Middle East escalation and shipping risks. That does not establish a newly verified production outage or a complete closure of a strait. [14]

Energy producers can benefit from higher realized prices, while transport, chemicals and households face higher costs. XLE gained 1.00%; ExxonMobil rose 2.21%. Gold, by contrast, fell 2.72%: a risk-off label does not imply every perceived haven rises together. Currency, positioning and liquidity needs remain possible influences not isolated here.

What the market rewarded—and what it did not

Visible orders, stronger guidance and less exposed regional earnings profiles were rewarded. Weak outlooks and the gap between investment and free cash flow were punished. The Russell 2000 gained 1.29% while the Nasdaq fell: evidence of relative strength beyond technology heavyweights, not proof of a lasting rotation or an imminent recession.

November 2–6: three paths, no price promises

Relief

Easing price pressure and solid orders calm funding concerns. Yields and oil remain contained. Quality technology and cyclicals could then stabilize together; broader participation would provide confirmation.

Selective market

AI revenue grows while cash-flow questions persist. Suppliers with strong execution outperform capital-hungry buyers. Europe and US small caps may remain relatively resilient without every index rising.

Renewed stress

Oil rises further or inflation and wages surprise to the upside, while utilization or credit conditions deteriorate. Higher discount rates then meet weaker cash-flow expectations, putting even recent winners at risk.

These are conditional scenarios, not forecasts with invented probabilities. The report does not replace an individual assessment of risk, time horizon and position size.

Next week’s monitoring list

Monday, Nov 2: ISM manufacturing—read demand, orders and prices together.
Tuesday, Nov 3: US midterm elections and JOLTS job openings—separate political uncertainty from the economic diagnosis.
Wednesday, Nov 4: October euro-area flash inflation and ISM services. Euro inflation is an upcoming release, not an already published result for this week.
Thursday, Nov 5: Bank of England, US productivity and labor costs—signals for margins and wage pressure.
Friday, Nov 6: October US employment report—assess payrolls, unemployment and wages together.
Throughout: oil and shipping, AI order intake, cash conversion and market breadth. A price rebound without better funding economics is not enough confirmation.

Sources and calculation basis

Market prices: SmartDeer market snapshot generated October 31, 2026, 06:00 Europe/Berlin, containing final October 30 closes. Sources below substantiate events and company figures, not an exact decomposition of price drivers. Calendar entries are scheduled releases.