AMD Surges 14% as Microsoft Eases AI Spending Concerns

What happened

AMD shares jumped 14% on Thursday as the semiconductor sector rallied sharply following Microsoft's earnings report. The PHLX chip index surged nearly 8%, with Micron Technology up 18% and Sandisk soaring 24%. Microsoft's forecast showed quarterly sales and cloud growth above expectations, while capital expenditures came in below estimates-a combination that eased investor fears about returns on massive AI infrastructure spending. The rally reversed a recent selloff in chip stocks, which had seen the tech-heavy Nasdaq-100 drop 10% from its early June peak amid valuation concerns and negative cash-flow reports from Alphabet and Tesla the previous week.

Why it matters

The semiconductor rally reflects renewed confidence in AI infrastructure demand and the financial sustainability of the AI buildout. AMD, as a key provider of data centre processors and AI accelerators, benefits directly from continued enterprise investment in AI infrastructure. Microsoft's ability to forecast strong cloud growth while managing capital spending below expectations suggests that hyperscale customers-critical buyers of AMD's server chips-can maintain AI investments without sacrificing profitability. However, Meta Platforms' 91% drop in second-quarter free cash flow underscores that not all AI investors are navigating the spending pressure equally, creating what one portfolio manager called 'true battleground stocks' where investor sentiment remains divided on return on investment.

Bigger picture

The semiconductor sector has faced mounting pressure over AI valuation concerns, with investors questioning whether massive capital expenditures by technology giants would deliver sufficient returns. The recent selloff pushed chip stocks lower despite strong earnings, as negative cash-flow reports from major AI spenders raised doubts about the pace and profitability of the AI buildout. Microsoft's results provided a counterpoint, demonstrating that a major hyperscaler could accelerate AI deployment while maintaining cash generation. This dynamic is particularly important for AMD and peers, as their growth depends on sustained demand from cloud providers and enterprise customers who must balance AI ambitions with financial discipline. Apple's recent ascent to become the world's most valuable company at $4.9 trillion-achieved without heavy AI spending-adds another dimension to the debate over AI investment strategies.

What to watch

Upcoming earnings from Amazon and Apple will provide further signals on AI spending trends among major technology companies. Amazon's results are particularly significant, as its stock has underperformed this year due to concerns about AI capital expenditures. Investor focus will centre on whether other hyperscalers follow Microsoft's path of managing spending while delivering growth, or if Meta's cash-flow strain becomes more widespread. The Federal Reserve's monetary policy path remains uncertain after mixed messages from new Fed Chair Kevin Warsh, with traders now pricing only a 59% chance of a rate hike in September, down from 82% a week earlier. The 30-year Treasury bond yield hit its highest level in 19 years, which could influence technology valuations and capital allocation decisions.