Dow and S&P 500 hit records as AI earnings fuel Wall Street

Two engines drive the rally

The S&P 500 and Dow Jones Industrial Average finished Tuesday at all-time highs, extending a sharp rebound powered by AI-linked corporate results and renewed hopes for an agreement to ease the Iran conflict.reuters +1 Preliminary closing data put the S&P 500 up 1.8% at 7,737.70 and the Dow up 1.7% at 54,090.66, while the Nasdaq Composite advanced 2.6%.reuters The S&P secured its first record close since July 2; the Dow set a second consecutive closing high.reuters

The session paired stronger profit expectations with relief in energy markets. Crude prices fell about 5% after a Qatari official said diplomatic efforts were continuing and U.S. Treasury Secretary Scott Bessent suggested a deal to reopen the Strait of Hormuz could arrive within two days.nbcnews Lower oil prices also reduced pressure on inflation expectations and Treasury yields, giving richly valued growth stocks another lift.

Palantir and Caterpillar widen the AI trade

Palantir surged nearly 30%, its biggest one-day percentage gain since February 2024, after lifting its annual revenue forecast.reuters Caterpillar rose after raising its own growth outlook, with demand for power-generation and construction equipment benefiting from the buildout of AI data centers.wtvbam +1 The industrial company alone contributed more than 300 points to the Dow’s advance.reuters

Semiconductors joined the rally: the Philadelphia Semiconductor Index climbed nearly 7% after losing 20.6% in July.reuters The breadth beneath the headlines was less uniform earlier in the session, when technology gains offset declines across seven of the S&P 500’s 11 sectors.nbcnews That split underscored how heavily the latest move still depended on companies tied directly or indirectly to AI spending.

Records raise the bar for future results

Second-quarter reporting has provided substantial support. Of 304 S&P 500 companies that had announced results through July 31, 85.2% beat estimates, compared with a long-term average of 67.5%.nbcnews +1 Strong results from Microsoft and Amazon had already reassured investors after a turbulent July, and the latest forecasts broadened enthusiasm beyond the largest cloud platforms.wtvbam

The risks have not disappeared. Investors are still testing whether huge AI capital budgets can generate durable returns, while elevated valuations leave little room for disappointing guidance.reuters +1 The Middle East boost is similarly conditional: oil’s decline reflects expectations for diplomacy rather than a completed agreement. Fresh records therefore mark a vote of confidence in earnings and de-escalation, but they also make both assumptions more consequential for the next market move.