Not Microsoft. Not Alphabet. Here's the Cloud Giant I'm Most Bullish About.

AWS revenue growth accelerated to 37% year over year in Q2, from 28% in Q1 and 24% in 2025's fourth quarter; operating income rose 64%, with a 39% operating margin. AWS generated 60% of Amazon's total operating income, while Amazon is on course for about $220 billion in data-center capital expenditures this year. The article argues this high-margin growth gives Amazon greater profit leverage than Microsoft or Alphabet and favors Amazon stock, while noting the spending scale and projected capex increases in 2027.

Analysis

The bullish case rests on profit mix, but the key question is whether AWS growth converts into durable cash returns after the infrastructure bill—not whether reported segment revenue is accelerating. A 39% operating margin is a snapshot; new capacity can bring depreciation, power and networking costs before utilization catches up. If capex is materially ahead of demand, AWS could grow quickly while consolidated free cash flow and the equity multiple come under pressure. Verify whether the cited roughly $220B is Amazon-wide capex or data-center spending, and track AWS cash contribution, depreciation and capacity utilization; the article does not establish those economics.

The second-order risk is that AI demand is expanding the market for all three providers rather than proving AWS is taking share. Azure and Google Cloud retain credible routes to workloads through existing enterprise and software ecosystems. Aggressive pricing or custom silicon could preserve utilization but dilute returns across the sector. Conversely, constrained power, grid connections and equipment availability could delay monetization despite strong bookings.

Near term, the positive growth narrative may support AMZN, but the 1–3 month test is guidance and cash conversion at the next results. Over 6–18 months, sustained AWS growth alongside improving cash returns would validate operating leverage; rising capex without corresponding utilization or cash contribution would reverse the thesis. Contrarian point: the article treats spending as evidence of expected returns, but management’s willingness to spend is not proof of attractive returns on invested capital.

Key Decisions for Investors

• Consider a modest relative-value long AMZN versus an equal-weight short in MSFT and GOOG only if the next results confirm AWS growth and show cash returns keeping pace with investment. This expresses a profit-mix thesis, not a claim that peers’ cloud businesses are deteriorating; avoid sizing it as an outright short of either competitor.
• Before entry, verify the scope and timing of the cited capex figure, then monitor AWS operating income against revenue, depreciation, consolidated free cash flow and any change in cloud growth guidance. If those disclosures do not support improving returns, keep the trade on watch rather than treating revenue growth alone as confirmation.
• Falsify or reduce the relative position if AWS growth decelerates materially, AWS operating income fails to keep pace with revenue, or capex rises while free cash flow and utilization weaken. Reassess as well if Azure or Google Cloud shows stronger growth and margin improvement in the same reporting period.