Week in Review: Oil and AI Spending Split the Market Before the Fed
A Thursday technology selloff erased an early rebound as investors challenged the cash cost of AI investment, while rising oil kept inflation risk alive. The S&P 500 and Nasdaq-100 ended lower, the Dow gained, and the regime remained R3 as leadership shifted toward health care, financials, and smaller companies.
Published Oct 25, 2026Open Market Journal5 min readAI-assisted research · methodologyNot investment advice
Week in Review
The early technology rebound didn't survive the week. The S&P 500 fell 0.47%, the Nasdaq-100 lost 0.79%, and the Dow gained 0.41%. Thursday did most of the damage as concerns about heavy AI spending and weak cash conversion hit the largest growth companies. The split mattered more than the modest index moves: investors weren't leaving equities outright, but they were demanding better proof from the most expensive part of the market.
Participation improved away from mega-cap technology. The Russell 2000 gained 2.00%, while health care and consumer staples finished ahead of the broad market. That rotation kept the week from becoming a general liquidation. It also confirmed the message carried through all five daily plans: company-level growth can still work, but broad technology leadership hasn't returned.
Rates and commodities sent a mixed signal. The 10-year Treasury yield ended near 5.00%, about 9 basis points lower for the week, as demand for government bonds offset some of the inflation concern. Brent crude rose 6.2% to $116.72 and WTI gained 2.0% to $103.44 as attacks around the Strait of Hormuz and the Iran conflict kept supply risk elevated. Gold fell about 4.1%. Friday's simultaneous rise in oil and Treasury yields showed how quickly energy pressure can remove the valuation relief from lower rates.
The U.S. data calendar was light, so earnings and oil carried the regime signal. Japan's core inflation reached 2.1%, while the week's technology results shifted the AI debate from demand toward financing and free cash flow. The regime stayed R3, but its weaker side gained weight: the long-term earnings case remains intact, yet poor participation and a second week of pressure on the main growth indexes leave no confirmed recovery.
Scoreboard
Five macro journal plans were supplied, one for each trading session from Monday through Friday. No session-preparation or session-review metadata was included in the packet, so a count by instrument can't be derived from the supplied reports.
The supplied reports don't contain usable portfolioValue or benchmarkValue figures for a separate value-based scoreboard. Full scoreboard data, including hit rates and day-type accuracy, isn't available. The code-computed weekly return record appears in Attribution below.
Attribution
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Top contributor: AMZN (+0.02%). It was the only holding with a positive static-weight contribution, though the benefit was negligible against the week's broader losses.
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Top detractor: META (-2.56%). Its Thursday selloff after higher spending and negative free cash flow concerns accounted for almost half of the portfolio's weekly decline.
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Benchmark gap: portfolio -5.35% versus SPY -0.43%, a 4.91 percentage-point shortfall. The concentrated META loss, smaller drags from MSFT and NVDA, and a -2.14% residual from rebalancing and timing explain the gap.
Lessons
No session-review material from "What We Learned" or "Implications for Next Preparation" was included in the supplied packet, so no routed lessons are stated.
Next Week Outlook
The Fed decision on Wednesday is the first major test. The meeting has no new projection package, so the statement and 18:30 UTC press conference will carry the message on oil, inflation, and the December path. Among current holdings, Microsoft reports later that day and Amazon follows on Thursday. Thursday also brings third-quarter U.S. GDP, September core PCE, jobless claims, and the ECB decision. There is no CPI or payroll release, and no separate Fed speaker is scheduled before the decision. The blackout ends Thursday, with Mary Daly and Alberto Musalem due to speak Friday.
The constructive path needs an unchanged Fed stance without a hawkish surprise, core PCE near the 0.2% monthly forecast, and earnings that show AI spending is still producing durable cloud revenue and cash flow. That combination could steady yields and reopen a selective growth rebound. A hotter inflation print, firmer wage costs, or another round of heavy spending without matching cash generation would keep pressure on long-duration technology. Softer growth with cooler inflation could help bonds, but a sharp demand miss would favor defensives rather than confirm a broad risk-on move.
Geopolitics remains an inflation input. Israel votes on Tuesday, while the G20 foreign ministers and the Manama Dialogue meet late in the week. Those scheduled events matter less to markets than the live risk around Iran and Strait of Hormuz shipping. A fresh disruption would reach equities through oil and bond yields first.
Event map (UTC):
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Mon Oct 26, Tier 3, all day: No Tier 1 U.S. economic release is scheduled.
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Tue Oct 27, Tier 2, 12:30: U.S. durable goods orders, with Cortiq showing 0.7% expected after 0.0%. Tier 2, 14:00: Conference Board consumer confidence, expected at 81.5 after 81.9, and new home sales. Tier 2, all day: Israel's legislative election.
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Wed Oct 28, Tier 2, 01:00: Reserve Bank of New Zealand rate decision. Tier 2, 10:00: U.K. Autumn Forecast Statement. Tier 2, 13:45: Bank of Canada rate decision. Tier 1, 14:30: EIA crude oil inventories. Tier 1, 18:00 and 18:30: Federal Reserve decision and press conference. Tier 1, 21:30: Microsoft earnings call after the U.S. close.
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Thu Oct 29, Tier 1, 12:30: U.S. third-quarter GDP, September core PCE, and initial jobless claims. Cortiq shows GDP growth at 1.4%, with core PCE at 0.2% month over month and 3.1% year over year. Tier 2, 13:15 and 13:45: ECB rate decision and press conference. Tier 1, 21:00: Amazon earnings call after the U.S. close. Tier 2, 23:30: Tokyo core CPI.
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Fri Oct 30, Tier 1, 02:30: Bank of Japan rate decision, followed by its 06:30 press conference. Tier 2, 07:00: German third-quarter GDP. Tier 1, 12:30: U.S. Employment Cost Index, with Cortiq showing 0.8% expected after 0.9%. Tier 2, 13:45: Chicago business barometer. Tier 2, 16:00 and 16:30: San Francisco Fed President Mary Daly and St. Louis Fed President Alberto Musalem speak after the blackout. Tier 2, all day: G20 foreign ministers meet in Atlanta, and the Manama Dialogue opens in Bahrain.
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Sat Oct 31, Tier 1, 01:00: China's official manufacturing PMI, with Cortiq showing 49.1 expected after 50.1.
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Continuous, Tier 1 headline risk: Iran, Houthi attacks, and Strait of Hormuz shipping remain the fastest route from geopolitics into oil, inflation expectations, and equity valuations.