Amazon's Cash Flow Burn: Why Investors Cheered

Amazon reported second-quarter results that showed a dramatic shift in free cash flow: from a positive $18.2 billion to a negative $7.6 billion over the trailing 12 months. That's a $26 billion swing that would typically spook investors.

However, the market reacted positively, with shares jumping 15% to around $271. The reason? The cash burn is not from operations but from massive capital spending on AI infrastructure.

Operating cash flow actually rose 33% year over year to $161.4 billion, while capital expenditures surged 64% to $169 billion. The company is investing heavily in AI, with CEO Andy Jassy noting plans for $220 billion in capital spending in 2026.

This spending is fueling growth across the business. Net sales grew 20% to $200.6 billion, with AWS revenue jumping 37% to $42.2 billion, its fastest growth in 18 quarters.

Investors are betting that these investments will pay off, even as free cash flow turns negative temporarily.

The key to Amazon's story is AWS. The cloud segment's 37% growth and 39.4% operating margin show that Amazon's AI investments are already generating returns. AWS now contributes about 60% of total operating income.

This is why investors are willing to overlook the negative free cash flow. They see a company that is growing revenue 20% and operating income 43%, with a clear path to monetizing AI.

The stock trades at 27 times forward earnings, which is reasonable for a company with this growth trajectory. The market is essentially paying for AWS's acceleration, and so far, AWS is delivering.

However, there are risks. If AWS growth stalls or capital spending continues to climb without corresponding returns, the negative free cash flow could become a problem. But for now, the bullish case holds.

Investors should focus on operating income, not net income, which was inflated by a $53.4 billion gain from Anthropic investment. The real profit engine is AWS.