Nvidia Retakes Market Cap Crown in 4 Days as Amazon Fuels Tech Rally
Nvidia is once again the most valuable company on Earth. The chipmaker closed up 2.93% at $200.75 on Friday, pushing its market cap to roughly $4.86 trillion and reclaiming the crown from Apple — just four days after Apple had taken it — as blowout earnings from Amazon reignited investor conviction in the AI trade across Wall Street.
What happened
The New York session on July 31 was split into two very different stories. Amazon reported second-quarter revenue of $200.6 billion, up 20% year-over-year and well ahead of the roughly $196.5 billion Wall Street had penciled in. The standout number was AWS: cloud revenue jumped 36.7% to $42.2 billion — its fastest growth in 18 quarters — crushing forecasts near $40.5 billion and delivering a 39.4% operating margin on a $496 billion contracted backlog. Amazon shares jumped as much as 12% on the print, and the company also raised its 2026 capital spending guidance from $200 billion to roughly $220 billion.
That AWS number mattered far beyond Amazon's own stock. As I wrote in Amazon Jumped 14%. Alphabet Fell 6% on the Same Capex Story, the market has been split on whether hyperscaler AI capex is paying off or just piling up as depreciation risk. Friday's AWS acceleration landed squarely on the "paying off" side of that debate, and it pulled cloud and chip names higher across the board — Alphabet, Microsoft and Nvidia all rallied alongside Amazon.
Why it matters: the market cap crown flipped again
The AI-optimism wave that lifted Nvidia came at Apple's expense. Apple had briefly overtaken Nvidia as the world's largest company earlier in the week, but its shares sank 7.35% on Friday after the company warned that supply constraints could weigh on future growth and that recent iPhone price increases risk denting consumer demand. That single-day move erased Apple's lead: Nvidia's roughly $4.86 trillion valuation moved back ahead of Apple's approximately $4.54 trillion, handing the title back after just four days in Apple's hands. This is the same supply-chain squeeze I flagged in Apple Beat Every Estimate. The Memory Chip Shortage Tanked It Anyway — it's now showing up as a recurring drag on the stock even as Apple's headline results keep beating estimates.
Who's affected
The winners and losers split cleanly along the AI-capex line. Nvidia, Amazon, Alphabet and Microsoft all gained as investors rewarded evidence that AI infrastructure spending is translating into real cloud revenue growth rather than sitting on the balance sheet as unmonetized capex. Apple was the lone large-cap decliner among the mega-caps, hit by a demand-and-supply combination rather than an AI-specific concern — its warning centered on component constraints and price-driven demand softness, not on losing ground in AI. That divergence echoes the pattern I broke down in Amazon Jumps 15%, Apple Sinks 7% — Nasdaq Still Gains 1%: strength in one mega-cap earnings report doesn't lift the whole index evenly, and Apple keeps ending up on the wrong side of that gap.
What to watch next
The market cap race between Nvidia and Apple has now flipped twice in under two weeks, which says more about how tightly wound this rally is than about either company's underlying business changing that fast. Key things to track from here: whether AWS's 36.7% growth rate holds up next quarter or was a one-time catch-up; whether Amazon's higher $220 billion capex guide raises the same depreciation concerns that hit Alphabet and Meta; and whether Apple's supply constraints ease or force further guidance cuts. Nvidia's own upcoming earnings will be the next major test of whether chip demand can keep justifying its valuation lead.
This is not financial advice — always do your own research before making investment decisions.
The bottom line: Friday's session was less about any single company and more about the market re-underwriting the AI capex thesis in real time — Amazon's cloud numbers gave it a vote of confidence, and Apple's supply warning cost it the crown it had held for less than a week.
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