Wall Street Rallies on AI Stock Earnings Beats and US Inflation Slowdown, S&P 500 Approaches Record High

The Quick Take

• The S&P 500 rose 0.27% to 7,748.50 on August 12, approaching its all-time high set on August 7, as AI stocks led gains on strong quarterly results from Super Micro Computer and CoreWeave
• Super Micro Computer surged 19% after its quarterly EPS beat estimates by 84%, while CoreWeave jumped 19.3% on revenue beats and smaller-than-expected losses — both confirming AI investment is producing real earnings
• US consumer prices rose 3.4% year-on-year in July, down from 3.5% in June, reducing the probability of a Federal Reserve rate hike in September and supporting equity valuations broadly

Wall Street posted broad gains on August 12 as two powerful tailwinds converged: strong AI sector earnings beats and a moderation in US consumer price inflation. The S&P 500 rose 0.27% to 7,748.50 — its first session of gains since setting an all-time high on August 7 — with the Nasdaq Composite rising 0.54% to 26,588.49. Super Micro Computer delivered the standout performance, surging 19% after its quarterly earnings per share beat consensus estimates by 84% and management provided guidance exceeding expectations. CoreWeave, an AI cloud infrastructure provider, jumped 19.3% after reporting revenue above estimates and losses smaller than forecast, with the CEO citing accelerating enterprise AI adoption as the driver of demand. Nvidia, which supplies AI chips to CoreWeave, rose 3% and was the single largest contributor to S&P 500 index gains on the session.

The CPI data provided the second pillar of the day's rally: US consumer prices rose 3.4% year-on-year in July, easing from the 3.5% June reading. While still above the Federal Reserve's 2% target, the deceleration reduced market expectations for a September rate hike, alleviating discount rate pressure on equity valuations. The Chicago Mercantile Exchange's FedWatch tool reflected the shift in rate expectations following the data release. For AI sector stocks specifically, the combination of actual earnings validation and reduced rate hike probability created a doubly supportive environment — earnings growth supports fundamental valuations while lower rates expand the multiples the market assigns to those earnings.

Watch for Federal Reserve Chairman commentary at the upcoming Jackson Hole symposium or next FOMC meeting for confirmation that the July CPI moderation is consistent with the Fed's disinflation narrative. The macro variable is whether July's inflation deceleration continues into August and September readings — a sustained trend would cement market expectations for rate cuts by year-end, providing an additional equity tailwind. Monitor Super Micro Computer and CoreWeave's next quarterly guidance updates as bellwether signals for whether AI infrastructure demand is sustaining the growth rates that generated August 12's earnings beats.

Synthesised from 2 sources.