Microsoft shares jump 15.5% on best day since 2008, lifts US markets

Microsoft stock surged 15.5% on Thursday, its strongest one‑day gain in nearly 18 years, after the company reported quarterly profit that beat analyst forecasts and showed robust Azure growth [2]. The rally helped the S&P 500 climb 1.7% and the Nasdaq jump 2.8%, while longer‑term Treasury yields steadied despite lingering inflation concerns.

Profit beat fuels rally

Microsoft’s earnings beat stemmed from a “strong” Azure cloud segment, which CEO Satya Nadella said reflects customers’ shift toward AI‑driven workloads [2]. Analysts had expected lower profit, so the surprise lift sparked a broad market bounce. Notably, Microsoft did not announce a larger AI‑spending budget, a move that contrasted with rivals that have raised their AI‑investment outlooks and helped calm investor worries about cash‑flow strain [2].

Ripple effects across tech and bonds

AI‑heavy chip makers recovered some of the sharp losses they incurred earlier in the week, with Micron Technology up 18.4% and Lam Research soaring 18% after beating profit and revenue estimates [2]. The Nasdaq’s 2.8% gain followed a 9.8% drop the previous day, underscoring the sector’s volatility. Meanwhile, longer‑term Treasury yields, which had spiked on inflation fears after Fed Chair Kevin Warsh’s comments, held steadier, suggesting the market is weighing corporate earnings strength against price‑rise risks [2].

What to watch

• Microsoft earnings release – next quarterly report (date not specified) will test whether Azure growth can sustain the stock’s momentum.
• AI‑spending guidance – any update from Microsoft on its AI investment budget could shift sentiment toward or away from other big‑tech peers.
• Semiconductor earnings – results from Micron, Lam Research and AMD will indicate whether chip demand from “hyperscalers” remains robust.

The 15.5% surge shows that a clear profit beat can override short‑term inflation anxiety, but the market’s next move hinges on whether Microsoft can keep translating AI spending into consistent earnings growth.