Amazon's AI Bet Is Paying Off at Record Speed — But Can $220 Billion in Spending Keep Delivering Returns?

Shares surged over 8% in after-hours trading Thursday after Amazon crushed second-quarter expectations, posting its fastest cloud growth in more than four years. The results land in the middle of a brutal week for Big Tech, where investors have punished companies that spend aggressively on AI without showing clear payoff. Amazon just made the case that its payoff has arrived — though the bill is still climbing.

Cloud Growth Hit a Pace Nobody Expected — and It's Driving Most of the Profit

AWS net sales rose 37% year-over-year to a $169 billion annualized run rate , while AWS operating income reached $16.6 billion, up from $10.2 billion a year earlier, at an operating margin of 39.4% . That margin crushed the 33.8% Wall Street expected. AWS contributed roughly 60% of Amazon's total operating income , meaning the cloud division is effectively subsidizing every other business — retail, delivery, groceries. When one division generates that much profit, any slowdown there hits the entire stock harder than a weak holiday season ever could.

AI Demand Is Real Revenue, Not Just a Promise

Amazon's AI business and custom chips business each exceeded annual revenue run rates of $25 billion, with both growing at triple-digit rates . That is concrete money, not a research-stage talking point. CEO Andy Jassy warned that "even at that amount, we will still not have enough capacity to meet all the demand we have in 2026," adding that demand already booked for 2028 is "striking." That backlog justifies heavy spending — but only if margins hold.

The Cash Burn Is the Price Tag Investors Must Stomach

Free cash flow swung to negative $7.6 billion over the trailing 12 months, driven by a $66.1 billion year-over-year jump in property and equipment purchases . Amazon also raised its 2026 capital spending plan to $220 billion, citing higher memory costs — the kind of input-cost pressure that could compress margins if revenue growth even slightly decelerates.

Soft Q3 Guidance Adds a Footnote of Caution

Amazon guided Q3 revenue at $197–$202 billion, below the $204.1 billion analysts expected . The shortfall reflects a shift of Prime Day into Q2; excluding that timing quirk, growth "would be nearly 400 basis points higher." Investors will have to judge whether that explanation holds or masks a softer consumer outlook heading into the second half.