The MoatWide moat
Walmart (WMT) — moat facet
A cost advantage this large is worth more given away than kept, which is why the margin is four per cent and why a court's $2.9 billion went into prices rather than earnings.
Ask what actually stops somebody from doing what Walmart does and the answer is not the brand, which is functional rather than beloved, and not the technology, which anyone can buy. It is arithmetic. Walmart spent $147,943 million running its business in fiscal 2026 and spread that cost over $706,413 million of merchandise1. A competitor with a tenth of the volume and the same cost discipline carries the same kinds of expense — distribution centres, software, trucks, buyers, lawyers — over a tenth of the sales. That gap is the moat, and it does not close with effort.
What makes it unusual among the wide moats in this collection is that Walmart spends it rather than banks it. The pricing philosophy has an ugly name and a precise meaning: everyday low price, funded by everyday low cost, under which the company deliberately prices items low every day so customers stop waiting for promotions2. A cost advantage returned to the customer as price is a cost advantage that recruits more volume, which lowers cost per unit again. It also means the reported margin understates the moat. Four per cent is not what Walmart can earn. It is what Walmart has chosen to earn.
The June 2026 quarter put that choice on display in an unusually literal way. After the Supreme Court struck down the tariffs collected under the International Emergency Economic Powers Act, Walmart received approximately $2.9 billion of refunds from Customs and Border Protection, recorded as a reduction of cost of sales and representing substantially all of what it had asked for3. Reported operating income rose 28.8%; adjusted for the refund and for currency it rose 17.4%, because the company had spent much of the windfall on lowering prices, and said the remaining refunds would go the same way4. A smaller retailer would have banked it and reported a wonderful quarter.
Four things hold the position up, and they are not equally strong. The store estate is the strongest: 4,611 American units, 3,728 of them owned outright, sitting within a short drive of most of the country and now doubling as the fulfilment network for a $150 billion eCommerce business. The price is second: $535,395 million of annual buying is a negotiating position no rival has. Third is the grocery trip, which brings 280 million people a week through the door for a reason that does not go out of fashion. Fourth, and newest, is the small pile of businesses — advertising, membership, marketplace, fulfilment services — that earn like software on top of all the rest.
The honest limits are three. Walmart is not unbeatable on a narrow basket, because a hard discounter carrying two thousand items avoids the cost of the other hundred and eighteen thousand. The estate that is such an advantage is also $136,083 million of net property against $134,587 million of accumulated depreciation5 — half used up, and expensive to keep current at $26,642 million a year. And the returns have been mediocre for a decade: the company earned a better return on capital in 2015 than it does now.
None of that makes the moat narrow. It makes it a moat around a business with modest economics, which is a different thing from a moat around a lucrative one, and the distinction is the entire reason to look at Walmart's return on capital rather than its market share.
One number tests this facet and Walmart publishes it without enthusiasm: return on investment, 15.1% in fiscal 2026 against 15.5% the year before6. A moat that is genuinely widening should eventually show up there. Eleven years of history say it has not.
Walmart is taking share across categories and, in its own words, across income tiers led by upper-income households, while the conventional supermarkets lose ground. The digital business that was a loss-maker five years ago now produces most of the growth and improves the margin rather than diluting it, and the advertising and membership lines are compounding at several times the rate of sales. What has not widened is the return on capital, which is why this is a moat getting stronger around a business whose economics are unchanged.
NOPAT over average operating invested capital, computed from the filings. It was 14.3% in fiscal 2015 and 10.3% in fiscal 2021; the moat clears its hurdle comfortably and has not compounded. If it is still near 14% in three years the heavy capital programme bought defence rather than returns.
- ReportedWalmart spent $147,943 million running its business in fiscal 2026 and spread that cost over $706,413 million of merchandise.Walmart Form 10-K, fiscal year ended January 31, 2026 - consolidated financial statements and notes (total revenues $713,163M, net sales $706,413M, membership and other income $6,750M, cost of sales $535,395M, operating expenses $147,943M, operating income $29,825M, net income attributable to Walmart $21,893M, diluted EPS $2.73; balance sheet including inventories $58,851M, accounts payable $63,061M, property and equipment net $136,083M, accumulated depreciation $134,587M, depreciation and amortisation $14,203M; segment note; disaggregation of revenue by merchandise category and by market, and eCommerce net sales by segment) — FY2026 (ended January 31, 2026) · publ. March 13, 2026 · source ↗
- ReportedThe pricing philosophy has an ugly name and a precise meaning: everyday low price, funded by everyday low cost, under which the company deliberately prices items low every day so customers stop waiting for promotions.Walmart Form 10-K, fiscal year ended January 31, 2026 - Item 1 Business and Item 2 Properties (approximately 280 million customers a week across more than 10,900 stores in 19 countries; 2.1 million associates, 1.6 million in the U.S.; 4,611 Walmart U.S. retail units of which 3,728 owned, 601 Sam's Clubs of which 464 owned, 5,743 international stores of which 1,486 owned; 3,566 supercenters at 633,724 thousand square feet, 351 discount stores at 36,609, 694 neighborhood markets and small formats at 36,609/28,375 with a 42,000 average; 192 U.S. and 179 international distribution facilities, 149 owned; pickup and delivery at over 8,400 locations globally; EDLP and EDLC; private brands; competition; Flipkart and PhonePe majority stakes in 2018) — FY2026 (ended January 31, 2026) · publ. March 13, 2026 · source ↗
- ReportedAfter the Supreme Court struck down the tariffs collected under the International Emergency Economic Powers Act, Walmart received approximately $2.9 billion of refunds from Customs and Border Protection, recorded as a reduction of cost of sales and representing substantially all of what it had askedWalmart Form 10-Q, quarterly period ended July 31, 2026 - condensed consolidated financial statements and notes (total revenues $187,937M, operating income $9,383M, other losses of $1,200M against gains of $2,708M, net income attributable to Walmart $6,366M and diluted EPS $0.80; segment note; the gain-contingency note recording approximately $2.9 billion of IEEPA tariff refunds received from U.S. Customs and Border Protection as a reduction of cost of sales; the statement that less than one third of what Walmart sells in the U.S. is imported) — Q2 FY2027 (quarter ended July 31, 2026) · publ. August 28, 2026 · source ↗
- ReportedReported operating income rose 28.8%; adjusted for the refund and for currency it rose 17.4%, because the company had spent much of the windfall on lowering prices, and said the remaining refunds would go the same way.Walmart second-quarter fiscal 2027 earnings release (Form 8-K exhibit 99.1) - revenue $187.9 billion +5.9% and +5.1% in constant currency; operating income +28.8% and +17.4% adjusted in constant currency; global eCommerce +23%; global advertising +38% with Walmart Connect excluding VIZIO +43%; membership fee revenue +17%; gross profit rate +96 basis points and Walmart U.S. +158; Walmart U.S. comp sales +2.6% and operating income +20.6% with operating expenses deleveraged 72 basis points; Sam's Club operating income +44.3% and International +16.6%; ROA 8.0% and ROI 15.4%; free cash flow $5.5 billion; 42.3 million shares repurchased for $5.1 billion year to date; FY27 guidance of 4.0-5.0% net sales growth, 7.0-8.5% adjusted operating income growth and $2.80-$2.87 adjusted EPS — Q2 FY2027 · publ. August 20, 2026 · source ↗
- ReportedThe estate that is such an advantage is also $136,083 million of net property against $134,587 million of accumulated depreciation — half used up, and expensive to keep current at $26,642 million a year.Walmart Form 10-K, fiscal year ended January 31, 2026 - consolidated financial statements and notes (total revenues $713,163M, net sales $706,413M, membership and other income $6,750M, cost of sales $535,395M, operating expenses $147,943M, operating income $29,825M, net income attributable to Walmart $21,893M, diluted EPS $2.73; balance sheet including inventories $58,851M, accounts payable $63,061M, property and equipment net $136,083M, accumulated depreciation $134,587M, depreciation and amortisation $14,203M; segment note; disaggregation of revenue by merchandise category and by market, and eCommerce net sales by segment) — FY2026 (ended January 31, 2026) · publ. March 13, 2026 · source ↗
- ReportedOne number tests this facet and Walmart publishes it without enthusiasm: return on investment, 15.1% in fiscal 2026 against 15.5% the year before.Walmart Form 10-K, fiscal year ended January 31, 2026 - Item 7 MD&A (Walmart U.S. comparable sales +4.3% with eCommerce contributing approximately 4.3 percentage points; return on assets 8.2% and return on investment 15.1% against 15.5%; net cash provided by operating activities $41,565M, payments for property and equipment $26,642M, free cash flow $14,923M against $12,660M and $15,120M; rent $2,434M; cash $10.7 billion and a $22.6 billion working capital deficit; membership income commentary) — FY2026 (ended January 31, 2026) · publ. March 13, 2026 · source ↗