Last week's note said strong earnings are no shield against a hawkish Fed; this time the trigger was oil, not results. A one-day domino — a weekend U.S.–Iran flare-up, WTI up 3.5%, September hike odds at 66%, the 10-year yield at 4.76% (its highest since January 2025) — flipped a market that had been weighing a September cut into one arguing over a hike. What stands out is less the index drop (-0.1% to -0.7%) than the split beneath it: rate-sensitive utilities, real estate and high-valuation semis sold off first, while cash-generative large-cap software (NOW +6.9%) drew buyers. That is a signal the market is again sorting stocks by earnings quality and rate sensitivity. With the Sept. 4 jobs report, Sept. 11 CPI and the Sept. 15–16 FOMC all close together, it is better to run a checklist — does oil hold above $85, does the 10-year break 4.80% — than to make a directional bet.
📊 Top Movers
🧭 Sector Performance
🇰🇷 Korean Investor Perspective
The won firmed 13.26 to 1,367.19 per dollar — strengthening on its own even as the Dollar Index (DXY) rose. Normally the won weakens when U.S. stocks fall, so this inverse move spared unhedged Korean investors a double loss: an S&P 500 decline of -0.33%, converted into won, actually turns slightly positive once the currency gain is included. Whether this won strength is a trend or a temporary retracement is unclear. Among vehicles popular with Korean investors, QQQ (-0.60%), SPY (-0.53%) and the triple-leveraged TQQQ (-1.88%) again showed how leverage magnifies losses. Worth noting: Micron (MU +2.5%), a peer tied to Samsung and SK Hynix, rose even in a weak chip tape, and the oil spike could bring some warmth to Korea-listed refiners and shipbuilders.
📊 Market Overview
On August 31 (Mon), the final trading day of the month, all three major U.S. indexes closed lower. The S&P 500 fell 0.33% (-25.62 pts) to 7,686.14, the Nasdaq Composite slipped 0.12% (-31.53 pts) to 26,370.89, and the Dow Jones Industrial Average dropped 0.70% (-374.09 pts) to 53,185.90. Monday's decline snapped a five-session winning streak for the Dow. Still, for the month as a whole, all three indexes held onto gains — a "soft finish to a solid month."
The catalyst for the pullback was geopolitical risk that flared over the weekend. U.S. forces struck Iranian rocket launchers near the Strait of Hormuz on Sunday (Aug. 30), reigniting a U.S.–Iran military exchange that had been dormant for about a month. The news sent crude oil sharply higher, and rising oil quickly spread into worries about inflation and further Federal Reserve tightening. It was a textbook "geopolitical shock" session: risk assets and bonds sold off together while only oil rallied.
The index losses themselves were modest, but the internals diverged. Energy rose sharply on its own, riding the oil spike, while rate-sensitive utilities and real estate, along with cyclical industrials, led the market lower. Technology was weak as semiconductor bellwethers such as Nvidia and Arm fell again, but cash-generative large-cap software (ServiceNow and others) actually drew buyers.
🔑 Key Issues
1. Renewed U.S.–Iran clashes — oil jumps 3.5%
The weekend U.S. strike near the Strait of Hormuz pushed Middle East tensions back up. Front-month WTI settled 3.53% higher at $86.34 a barrel, quickly reclaiming the $85 level. With the Strait of Hormuz — a chokepoint for global crude shipping — back in the conversation, the market grew wary of the chain "supply disruption → higher oil → renewed price pressure." The energy sector ETF (XLE) rose 2.68%, with Chevron (CVX +3.19%), Exxon Mobil (XOM +2.88%) and ConocoPhillips (COP +2.29%) all firmer.
2. September is now about a rate HIKE, not a cut
The oil spike immediately reshaped the Fed calculus. After Chair Kevin Warsh struck a hawkish tone at Jackson Hole last week — "while this summer's PCE and CPI readings were better than expected, they do not tell me that underlying trends have meaningfully improved" — this oil shock compounded matters, and market-implied odds of a 25bp September hike climbed to the mid-60s percent (around 66% on a futures basis, high-50s on the CME FedWatch tool). Just a few weeks ago the market was weighing a September cut; now it is arguing over whether the Fed hikes.
3. 10-year Treasury yield at highest since January 2025
Bonds sold off on the tightening fears. The 10-year Treasury yield rose 0.09 percentage point to 4.76%, its highest level since January 2025. The break higher in yields hit dividend- and asset-value-sensitive utilities (-2.20%) and real estate (-1.23%) directly, and also weighed on high-valuation growth stocks via a higher discount rate.
4. ServiceNow (NOW) +6.91% — a lone rally in a down market
Even as the indexes fell, ServiceNow surged 6.91%, the biggest gain among core names, closing at $147.99 — right up against Bank of America's $150 price target. With enterprise AI annual contract value (ACV) topping $1 billion and management confident of reaching $1.5 billion by year-end, the market's earlier fear that "AI will hollow out ServiceNow's business" is being unwound quickly. Reports of an expanded AI partnership added to the buying.
5. Semiconductors weak again — Arm -5.2%, Nvidia -3.2%
Rising yields and risk aversion hit high-valuation chip names first. Arm Holdings tumbled 5.21% and Nvidia fell 3.16%, retreating toward the $220 level. Intel (-2.80%) was also weak. By contrast, Qualcomm (QCOM +3.46%) and Micron (MU +2.50%) rose on stock-specific catalysts — a clear split within semis.
📊 Sector Trends
| Sector | Change | Key Driver |
|---|---|---|
| Energy | +2.68% | WTI +3.5% on renewed U.S.–Iran clashes; refiners and explorers rally |
| Consumer Discretionary | +0.61% | Tesla (+3.7%) rebound cushions the index |
| Communication Services | +0.04% | Flat; telecom (T, VZ) strength offsets media weakness |
| Consumer Staples | -0.12% | Slightly negative despite Walmart (+2.2%) strength |
| Financials | -0.29% | Banks mixed (BAC, WFC up; GS, MS down) |
| Health Care | -0.61% | Large caps such as Lilly (-1.7%) and Thermo Fisher (-2.2%) lag |
| Materials | -1.01% | Industrial metals soft on a firmer dollar and growth worries |
| Technology | -1.12% | Semiconductor slump (NVDA, ARM) pressures the whole sector |
| Real Estate | -1.23% | 10-year yield spikes to 4.76%, hitting rate-sensitive names |
| Industrials | -2.05% | 3M (-3.9%), Honeywell (-3.1%) and Caterpillar (-2.4%) all fall |
| Utilities | -2.20% | Dividend appeal fades as yields jump; sector's biggest loss |
🌍 Global Markets
- Europe STOXX 600: 651.10, -0.12% (-0.75 pts). Intraday volatility was high on Middle East risk, but energy strength limited losses and the index closed marginally lower.
- Dollar Index (DXY): 99.42, +0.26%. Up modestly on safe-haven demand and tightening expectations. The Korean won, however, moved the other way and strengthened.
- 10-Year U.S. Treasury Yield: 4.76%, +0.09 pp. Highest since January 2025. Oil-driven inflation worries and September hike odds pushed yields up.
- WTI Crude: $86.34, +3.53%. Military action near the Strait of Hormuz revived supply-disruption fears.
- Gold: $4,497.90, +0.44%. Safe-haven demand flowed in on geopolitical risk, but the yield spike capped the gain.
🚀 SPCX (SpaceX)
SPCX closed 2.0% higher at $143.69, holding an uptrend even on a down day for the indexes. The news flow was supportive. SpaceX successfully launched NASA's Nancy Grace Roman Space Telescope on a Falcon Heavy early on Aug. 30, and on Aug. 25 it formalized plans for "Starbase Louisiana," a $100 billion Starship launch-and-manufacturing complex in Louisiana. News that Starlink had secured a 10-year satellite broadband license in the UAE also supported sentiment. There was no sign of an unusual volume spike, and the stock is recovering gradually in the lower-middle of its 52-week range ($104.83–$225.64).
⚠️ Points of Caution
The character of this decline is not "deteriorating earnings" but "a repricing of the policy path." As oil rose, the scenario that the Fed might hike rather than cut in September suddenly became realistic, and that single catalyst shook rates, the currency and sector rotation all at once. Whether oil keeps rising — and how that feeds into the August CPI on Sept. 11 — will drive the market's direction over the next few weeks.
In particular, the riskiest posture right now is the simple momentum bet that "earnings were good, so it goes higher." After Nvidia sold off despite strong results last week, this week has again shown that good numbers are no shield in front of a hawkish catalyst. High-valuation groups like semiconductors can swing hard on a single tick in yields, so leveraged positions and new entry timing warrant extra caution. It is also worth remembering that this is an event-dense stretch heading into the Sept. 4 jobs report and the Sept. 15–16 FOMC.
👁 What to Watch Tomorrow
- Whether the S&P 500 holds 7,650: If Monday's 7,686 close gives way, the psychological support at 7,650 and then 7,600 come into view. A reclaim of 7,730 would leave room to view this pullback as short-term noise.
- ISM Manufacturing PMI (Sept. 1, 10:00 ET): Consensus is 47.0. Coming right after last week's Chicago PMI printed 47.1 — the year's low and about 10 points below consensus — a confirmation of manufacturing weakness could amplify stagflation worries: slowing growth plus oil-driven price pressure.
- Whether WTI holds $85: If oil firms above $85, September hike bets strengthen further; if the geopolitical premium bleeds out and it falls back below $83, both rates and stocks get some relief.
- 10-year yield resistance at 4.80%: A break above 4.80% adds selling pressure on utilities, real estate and growth. Stabilizing back below 4.70% could bring bargain hunting into rate-sensitive groups.
- Whether ServiceNow touches the $150 target: As the lone big gainer in a down market, whether it sees profit-taking after reaching the $150 target or extends into a new-high rally will be a barometer for software-sector sentiment.
💡 Upcoming Events
- Sept. 1 (Tue): ISM Manufacturing PMI (Aug)
- Sept. 2 (Wed): Hewlett Packard Enterprise (HPE) earnings (after the close)
- Sept. 3 (Thu): ADP employment report, ISM Services PMI (Aug), Broadcom (AVGO) / Lululemon (LULU) / Zscaler (ZS) earnings
- Sept. 4 (Fri): August jobs report (nonfarm payrolls, unemployment) — the week's biggest event
- Sept. 9 (Wed): Oracle (ORCL) earnings
- Sept. 11 (Thu): August Consumer Price Index (CPI)
- Sept. 15–16: September FOMC meeting (decision and press conference on the 16th)
📚 Sources
- Stock Market News for Aug 31, 2026 — Yahoo Finance/Zacks
- Stock Market Today (Aug. 31, 2026): Russell 2000, S&P 500 fall as Middle East conflict drags on — TheStreet
- Stock market news for Aug. 31, 2026 — CNBC
- Oil jumps, September hike odds rise to 66%, Dow -0.7% — Edaily
- S&P 500 falls Friday after Fed's Warsh highlights inflation worries — CNBC
- ServiceNow (NOW) Price Target Raised to $150.00 — MarketBeat
- ServiceNow investors must consider latest alert from Bank of America — TheStreet
- Chicago PMI Drops in August and Misses Market Expectations — Trading Economics
- United States Dallas Fed Manufacturing Index — Trading Economics
- HPE to Report Q3 Earnings: What's in the Cards for the Stock? — Yahoo Finance
- SpaceX (SPCX) Stock Price, Quote, News & History — Benzinga