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⚠ AI Margin PressureModerate threat

Amazon (AMZN) — threat to the moat

AI capacity is bought with $40B quarters, much of it at Nvidia's margins — which become AWS's costs.

The profit engine's margins are the thing the whole company leans on, and the AI boom presses on them from two directions. Building AI capacity is staggeringly capital-intensive — Amazon bought $77.3 billion of property and equipment in the third quarter of 2026 alone1, most of it for AWS and AI — and that spending weighs on free cash flow now against returns that arrive later. Much of the hardware, moreover, is bought from Nvidia at Nvidia's fat margins2, which become AWS's costs.

Technology and infrastructure expense, 2019-2025 ($B)$35.9B2019$42.7B2020$56.1B2021$73.2B2022$85.6B2023$88.5B2024$108.5B2025Amazon Forms 10-K FY2020-FY2025
The line that carries data-centre depreciation grew 23% in 2025 to $108.5B, after barely moving in 2024.

The danger is that AI turns out to be a lower-margin kind of cloud, at least for a while. Renting out expensive GPUs may earn thinner returns than AWS's traditional services until the capacity is fully utilized, and management itself has acknowledged that free cash flow is strained during the heavy build-out. If AI grows fast but at lower margins than the cloud it is replacing, the 57% share of Amazon's operating profit that AWS provided in 20253 could quietly thin even as revenue climbs.

Amazon's own silicon is the hedge. Its Trainium chips, which it says deliver roughly thirty percent better price-performance than comparable GPUs, let AWS escape some of Nvidia's margin and control its AI cost structure in a way rivals renting chips cannot. As utilization rises and Trainium scales, the early margin drag should ease, and so far the numbers run the other way: AWS's operating margin was 38.7% in the third quarter of 2026, against 34.6% a year earlier4.

Judge it moderate. The AI build-out genuinely pressures near-term margins and free cash flow, and a prolonged period of low-return AI capacity would matter to the engine that funds everything — but Amazon's custom silicon and the maturing of the capacity point toward margins recovering as the investment is monetized, not toward a permanent decline.

References
  1. ReportedBuilding AI capacity is staggeringly capital-intensive — Amazon bought $77.3 billion of property and equipment in the third quarter of 2026 alone, most of it for AWS and AI — and that spending weighs on free cash flow now against returns that arrive later.
    Amazon.com, third-quarter 2026 results release (Form 8-K, Exhibit 99.1) — net sales $201,944M (+12%, +13% excluding a $0.9B unfavorable foreign-exchange impact), operating income $28,076M (+61%) at a 13.9% operating margin, described in the release's own headline as Amazon's highest operating margin ever; net income $20,685M and diluted EPS $1.89, both lower than the $21,187M and $1.95 of third quarter 2025, which the release attributes primarily to $9.5B of pre-tax gains on the investments in Anthropic recorded in that earlier quarter; total non-operating expense of $1,207M in the quarter (interest income $1,187M, interest expense $1,691M against $538M, other expense $703M) against non-operating income of $10,748M a year earlier; segment results North America net sales $112,852M (+6%) and operating income $8,723M (7.7% margin against 4.5%), International $43,108M (+5%, +8% excluding currency) and $1,580M (3.7% against 2.9%, +42% excluding currency), AWS $45,984M (+39%, its fastest growth in nearly five years, a $184 billion annualised revenue run rate) and $17,773M (38.7% margin against 34.6%); net sales mix North America 56%, International 21%, AWS 23%; the Prime Day timing shift, with the event in the second quarter this year for most large countries and entirely in the third quarter in 2025, without which third-quarter growth would have been approximately 400 basis points higher; net sales by product line online stores $68,470M (+2%), third-party seller services $46,492M (+9%, +10% excluding currency), advertising services $19,637M (+11%, +12% excluding currency, after 22% excluding currency in each of Q2 2025, Q3 2025, Q4 2025 and Q1 2026 and 26% in Q2 2026), subscription services $14,006M (+11%), physical stores $5,710M, other $1,645M; worldwide shipping costs $28,295M (+11%) against worldwide paid unit growth of 12% and a seller unit mix of 61%; employees 1,638,000 (+4%); trailing-twelve-month net sales $797,455M, operating income $104,366M at a 13.1% margin, net income $134,779M and diluted EPS $12.37, operating cash flow $168,300M (+29%), purchases of property and equipment net of proceeds $210,657M (+82%) and free cash flow of minus $42,357M against plus $14,788M a year earlier, with the supplemental table's trailing free-cash-flow series $18,184M, $14,788M, $11,194M, $1,232M, minus $7,604M and minus $42,357M for Q2 2025 to Q3 2026 and North America's trailing operating margin at 8.2%; purchases of property and equipment of $77,259M in the quarter and $175,670M in nine months; nine-month other income of $68,359M and a $78,788M pre-tax change in net unrealized gains on available-for-sale debt securities recorded in other comprehensive income; proceeds from long-term debt of $48,102M in the quarter and $115,100M in nine months, taking long-term debt from $65,648M at December 31, 2025 to $173,125M, total assets from $818,042M to $1,243,390M and other assets from $122,607M to $358,775M; Andy Jassy's statement of projected AWS revenue growth rates “of over 40% both in 2027 and in 2028”; and fourth-quarter 2026 guidance of $240.0-247.0B of net sales (+12% to +16%) and $28.5-33.5B of operating income against $25.0B, with 2026 cash capital expenditures still expected to be approximately $220 billion and fourth-quarter advertising revenue expected to grow in the high teens — Q3 2026 — quarter ended September 30, 2026 · publ. October 29, 2026 · source ↗
  2. ReportedMuch of the hardware, moreover, is bought from Nvidia at Nvidia's fat margins, which become AWS's costs.
    NVIDIA, Q1 FY2027 financial results (press release + CFO commentary) — Q1 FY2027 — quarter ended Apr 26, 2026 · publ. May 2026 · source ↗
  3. ReportedIf AI grows fast but at lower margins than the cloud it is replacing, the 57% share of Amazon's operating profit that AWS provided in 2025 could quietly thin even as revenue climbs.
    Amazon.com Inc., Form 10-K, FY2025 — segment results (net sales North America $426,305M, International $161,894M, AWS $128,725M; operating income $29,619M, $4,750M and $45,606M of a consolidated $79,975M, against $24,967M, $3,792M and $39,834M of $68,593M in 2024), net sales by product line (online stores $269,287M, physical stores $22,561M, third-party seller services $172,162M, advertising services $68,635M, subscription services $49,619M, AWS $128,725M, other $5,935M), net income $77,670M, and 2025 charges of $2.5 billion recorded in Q3 2025 primarily related to the settlement of a lawsuit with the Federal Trade Commission — Fiscal year ended December 31, 2025 · publ. February 2026 · source ↗
  4. ReportedAs utilization rises and Trainium scales, the early margin drag should ease, and so far the numbers run the other way: AWS's operating margin was 38.7% in the third quarter of 2026, against 34.6% a year earlier.
    Amazon.com, third-quarter 2026 results release (Form 8-K, Exhibit 99.1) - Supplemental Financial Information and Business Metrics, six quarters from Q2 2025 to Q3 2026. North America: net sales $100,068M, $106,267M, $127,083M, $104,143M, $116,177M and $112,852M, growth excluding currency 11%, 11%, 10%, 12%, 16% and 6%; operating income $7,517M, $4,789M, $11,472M, $8,267M, $9,123M and $8,723M; operating margin 7.5%, 4.5%, 9.0%, 7.9%, 7.9% and 7.7%; trailing-twelve-month net sales $404,078M, $414,808M, $426,305M, $437,561M, $453,670M and $460,255M, trailing operating income $28,277M, $27,403M, $29,619M, $32,045M, $33,651M and $37,585M, and trailing margin 7.0%, 6.6%, 6.9%, 7.3%, 7.4% and 8.2%. International: net sales $36,761M, $40,896M, $50,724M, $39,789M, $42,197M and $43,108M, growth excluding currency 11%, 10%, 11%, 11%, 15% and 8%; operating income $1,494M, $1,199M, $1,040M, $1,424M, $1,717M and $1,580M, with operating income growth excluding currency of 324%, (31)%, (45)%, 6%, 18% and 42%; trailing net sales $149,582M, $154,590M, $161,894M, $168,170M, $173,606M and $175,818M, trailing operating income $5,127M, $5,025M, $4,750M, $5,157M, $5,380M and $5,761M, and trailing margin 3.4%, 3.2%, 2.9%, 3.1%, 3.1% and 3.3%. AWS: net sales $30,873M, $33,006M, $35,579M, $37,587M, $42,232M and $45,984M, growth excluding currency 17%, 20%, 24%, 28%, 37% and 39%; operating income $10,160M, $11,434M, $12,465M, $14,161M, $16,621M and $17,773M; operating margin 32.9%, 34.6%, 35.0%, 37.7%, 39.4% and 38.7%; trailing net sales $116,378M to $161,382M and trailing operating income $42,786M to $61,020M. Net sales by product line: online stores $61,485M, $67,407M, $82,988M, $64,254M, $70,432M and $68,470M; advertising services $15,694M, $17,703M, $21,317M, $17,243M, $19,809M and $19,637M; subscription services $12,208M, $12,574M, $13,122M, $13,427M, $13,730M and $14,006M. Worldwide shipping costs $23,370M, $25,384M, $31,492M, $25,709M, $27,873M and $28,295M, growing 6%, 8%, 10%, 14%, 19% and 11% against worldwide paid-unit growth of 12%, 11%, 12%, 15%, 17% and 12% and a seller unit mix of 62%, 62%, 61%, 60%, 61% and 61%; employees 1,546,000 to 1,638,000. Trailing operating cash flow $121,137M to $168,300M, trailing purchases of property and equipment net of proceeds $102,953M to $210,657M, and trailing free cash flow $18,184M, $14,788M, $11,194M, $1,232M, $(7,604)M and $(42,357)M — Q2 2025 - Q3 2026 · publ. October 29, 2026 · source ↗
Sources
Generated October 30, 2026