Amazon's accelerating AWS growth at high margins shows the strength of its moat, but returns on heavy capex remain unproven. AWS grew 39% to $46B, its fastest growth in nearly five years, at a 38.7% operating margin; Amazon posted record operating income. Online stores grew 2%, while ads grew 11%, down from 26% last quarter. Trailing free cash flow fell to -$42.4B as net capex reached $210.7B. Returns on about $220B of planned 2026 capex remain the open question, with free cash flow the test. x.com x.com x.com x.com x.comÂ