What happened

Over the past twelve months, exchange-traded funds tracking Brazilian, Mexican and Argentine stocks have rallied hard — a mix of the funds tracking Brazil (EWZ), a small-cap Brazil fund (EWZS), a 3x-leveraged Brazil fund (BRZU), broad Latin America (ILF), Mexico (EWW), Argentina (ARGT) and Chile (ECH) rose a simple average of roughly 34%, led by BRZU's leveraged 76% gain and ILF's 42%. Over the identical window, the region's three largest online-commerce companies — MercadoLibre, Sea and Coupang — fell an average of 32.8%. That is a roughly 65-to-70 point gap between the indices and the companies that, in theory, sell into the same growing consumer markets. The gap is real, but it is not one story: the three stocks fell for three different reasons, and one of them barely fell at all relative to how much its business grew.

The ETF rally is a commodities-and-rates story, not an e-commerce one

The Brazilian stock index that anchors most of these funds is dominated by the oil producer Petrobras, miner Vale, and banks Itaú Unibanco and Bradesco, along with brewer Ambev and industrial group WEG — names tied to commodity prices, interest-rate policy and bank lending, not online retail. Brazil's central bank has cut its benchmark Selic rate three straight times to 14.25% through mid-2026, and the Ibovespa has traded near record highs as the Brazilian real strengthened roughly 8% year-to-date. That currency strength is a genuine, if partial, tailwind for MercadoLibre's dollar-reported results, but it is a small piece of what is driving fund returns dominated by oil, mining and banking. Brazilian markets have also rallied specifically on rate-cut expectations — a dynamic with no direct read-through to how many packages get shipped in São Paulo.

Three companies, three different stories

MercadoLibre, which runs Latin America's largest online marketplace alongside the Mercado Pago digital-payments and lending business, fell the least of the three (-21.6%) despite the best fundamentals: first-quarter 2026 revenue accelerated to 49% year-over-year growth — its fastest pace in four years — with gross merchandise volume up 42%. Operating margin compressed to 6.9% from 12.9%, but management framed that as deliberate investment in free shipping and 2.7 million new credit cards issued in the quarter, not weakening demand; the stock still fell 13% the day after that earnings report. Its forward valuation compressed from 3.8x to 2.1x expected sales over the same period growth accelerated — a multiple falling as the business speeds up. The credit book, at $14.6 billion and growing 87% year-over-year, carries a greater-than-90-day delinquency rate near 17.6%, but those loan vintages are still too new to show their true loss rate. Investor Michael Burry disclosed a new MercadoLibre stake in the $1,500s-$1,600s in May. Verdict: business CONTRADICTS the sell-off (growth accelerated); valuation is INCONCLUSIVE pending the credit book seasoning.

Sea, which owns Southeast Asia's Shopee marketplace, the Garena gaming unit and the Monee digital-lending arm, fell 31.9% over the full year but has recently reversed. First-quarter Shopee volume grew 30%, the Monee loan book expanded 70% to $9.9 billion with stable asset quality, and total revenue rose 47%. The stock jumped 13.7% on that report, enough to flip its trend to an uptrend in late July after months in a downtrend. Verdict: business CONFIRMS a recent, not full-year, turn — the year's decline predates the current improvement.

Coupang, the South Korean e-commerce and grocery-delivery company also pushing into Taiwan, food delivery and fashion resale through Farfetch, fell the most (-44.8%) and is the one name whose stock move matches a genuine earnings break. It swung to a $266 million net loss after issuing $1.2 billion in customer vouchers tied to a data breach that exposed roughly 34 million accounts — about two-thirds of South Korea's population — and now faces a regulatory fine of up to $900 million; its Developing Offerings losses nearly doubled to $329 million even as that segment's revenue grew 28%. The stock trades at 0.90x trailing sales with no price-to-earnings multiple to speak of, and consensus price targets near $27-35 versus a roughly $16 share price imply the market sees the breach costs as largely one-off. Verdict: business CONFIRMS the decline; valuation leans toward POSSIBLE DISLOCATION if the fine and vouchers prove transitory.

The technical picture agrees only partly

Despite trailing twelve-month gains, several LatAm funds — EWZ, EWZS, ECH and BRZU — have actually rolled into short-term downtrends as of July 31, meaning the rally has already cooled even before any e-commerce comparison. MercadoLibre and Coupang remain in mild downtrends; Sea alone sits in an uptrend, confirming its post-earnings turn rather than the full-year decline.

The setup

Where it stands — MercadoLibre's revenue growth is accelerating while its multiple compresses; Coupang's loss is fundamental; Sea has just inflected higher. Would confirm — MercadoLibre's >90-day loan delinquency rate stabilizing below 17.6% as 2025-26 credit vintages season. Would invalidate — MercadoLibre's operating margin failing to recover toward 10%+ by FY2027 as UBS's base case assumes. Watch next — Coupang's next earnings for confirmation the Korean regulatory fine, up to $900 million, is finalized rather than open-ended. Valuation — MELI trades at 2.1x forward EV/Revenue (from 3.8x) and 48x trailing P/E; CPNG at 0.90x trailing sales with no P/E.