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U.S. stocks closed July on a cautious up-note as investors absorbed fresh signals that Big Tech’s expensive push into artificial intelligence may be starting to pay off — even as rising oil prices tied to the Middle East conflict pushed yields and consumer costs higher. The mix left major indexes bouncing in volatile trading and capped a choppy month with only a small decline.
The S&P 500 ended the session up about 0.7%, while the Dow Jones Industrial Average rose roughly 0.5% and the Nasdaq gained near 1% after swinging between strong gains and modest losses during the day. Despite the week’s bounce, the benchmark S&P finished July slightly in the red.
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Amazon led U.S. movers after reporting quarterly profit that far exceeded analysts’ predictions. The company’s earnings more than tripled year over year, helped by faster growth in its cloud services — a development investors read as evidence that heavy spending on AI may be starting to convert into stronger margins. Amazon also raised its outlook for capital spending this year.
Microsoft posted similar momentum a day earlier, drawing investor attention to the possibility that large-scale AI investments are beginning to boost profitability for the sector’s biggest players.
But gains were uneven. Apple shares fell sharply despite a quarterly beat, after executives warned that supply constraints — in part driven by demand for AI-related components — would likely slow revenue growth in the current quarter.
Chip sector whipsawed
Stocks tied to semiconductors were particularly volatile as demand from the so-called hyperscalers fluctuated. Micron Technology, for example, swung from an early double-digit-style move to a steep decline before finishing the day down nearly 6%.
- Market leaders: Amazon jumped about 15% on the earnings beat and cloud strength.
- Mixed tech signals: Microsoft’s gains reinforced AI optimism; Apple disappointed on forward guidance.
- Chip turmoil: Memory and processor makers experienced sharp intraday reversals tied to shifting sentiment about AI demand.
Energy shock, inflation worries and rising yields
Markets also contended with another uptick in crude prices amid continuing uncertainty over the conflict in the Middle East. Brent crude settled near $87.93 a barrel, after earlier trading between roughly $72 and $102 during the month. Higher oil has fed through to consumers already: average U.S. gasoline prices are approaching $4.11 per gallon, up from about $3.85 a month earlier, according to AAA.
That jump in energy costs added pressure on bond markets. The 10-year Treasury yield climbed to about 4.71%, up from the prior session and markedly higher than levels before the geopolitical flare-up. The rise in longer-term yields has pushed the typical long-term U.S. mortgage rate to its highest point in a year.
Policy uncertainty and criticism of the Fed
The Federal Reserve opted to hold its main policy rate steady this week, even as officials reiterated a commitment to return inflation to a 2% target. The Fed chair emphasized a desire not to telegraph future moves — a stance that some market participants say leaves investors without clear guidance.
Critics warned that continued ambiguity risks damaging the central bank’s credibility. One economist said without a clearer explanation for past choices, statements of future resolve can appear hollow. Bank of America economists argued the Fed must act in September if inflation readings don’t ease, or risk further credibility erosion.
Overseas shocks: Korea’s wild swings
Outside the U.S., volatility was even more pronounced in South Korea’s tech-heavy market. The Kospi rallied a record 17.9% on the day — a move led by huge one-day gains for Samsung Electronics and SK Hynix — yet the index still suffered a steep 22% drop for July after an extraordinary run earlier in the year.
Quick snapshot
- S&P 500: up about 52 points to ~7,489.72
- Dow Jones: added roughly 277 points to ~52,485.03
- Nasdaq: rose roughly 252 points to ~25,373.85
- Brent crude: ~$87.93 per barrel
- 10-year Treasury yield: ~4.71%
What matters now: investors are parsing corporate earnings for signs that AI spending is translating into durable profit growth, while energy-driven inflation and higher yields continue to complicate the outlook for consumers, borrowers and central-bank policy. The balance between those forces will shape how markets behave heading into September.
