Stocks Post August Gains but US-Iran Strikes Drive Profit-Taking To End the Month: Aug. 31, 2026 — 2026-08-31
What moved & why: US-Iran strikes lifted crude costs and interest rates, triggering profit-taking on the final day of August ahead of seasonally weak September. Fed Chair Warsh's hawkish Jackson Hole remarks last Friday reinforced rate-hike expectations.
Cross-asset:
- Equities: Dow Jones Industrial and Russell 2000 underperforming; Nasdaq 100 and S&P 500 outperforming. Energy and tech the only advancing sectors of 11 principal segments.
- Rates/Treasuries: Yield curve climbing in bear-steepening motion led by longer tenors.
- Dollar: Retreating slightly.
- Oil/Commodities: Crude costs rising; commodities ex precious metals catching bids.
- Crypto: Cryptocurrencies catching bids in risk-off session.
Econ / Fed angle: Market pricing 66% probability of a Fed rate hike at the September policy decision (16 days out) and 50% chance of a second hike before year-end. Persistently elevated fuel prices supporting inflation well above target. Tighter financial conditions punishing cyclical stocks. China's manufacturing PMI improved to 49.8 (from 49.2) but remains in contraction; services PMI flat at 49. South Korea's production growth slowed; retail sales fell 2.4% m/m in July.
Watch next: Upcoming jobs data (government, ADP, Challenger reports) will be critical. Wall Street needs weak labor statistics to justify rate relief and ease financial conditions. A second consecutive month of declining payrolls could spark heavy bond buying and significant market rebounds; lighter-than-expected figures paired with geopolitical progress could drive double-digit yield drops.