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Banco Macro S.A. (BMA): Argentine Reform-Era Bank Riding Milei Disinflation to a Real-ROE Inflection

Published August 20, 202625 min read·TickerFile Research · Banco Macro S.A. (BMA)
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Banco Macro S.A. is a domestic Argentine commercial bank that has spent the last decade inside one of the most volatile macro environments any listed bank operates in, and the second-quarter 2026 print is the first quarterly disclosure in which the company is fully digesting the Milei-era disinflation rather than merely reacting to it. The headline net income figure for the quarter, when translated from pesos at the official exchange rate, is on the order of two hundred to three hundred million US dollars, but the more interesting story sits beneath that number: the bank's net interest margin is now running in the high single digits to low double digits on inflation-adjusted assets, and the underlying return on equity is starting to clear the fifteen-to-twenty-five percent real threshold that Argentine banks last approached before the 2023 currency crisis.

The mechanism behind that inflection is not primarily a credit story. The story is that Argentina's monthly inflation rate has fallen from the multi-decade highs of 2023 and 2024 into a range where Banco Macro can earn a real spread on its peso loan book without that spread being immediately consumed by the next CPI print. With peso rates still elevated by historical standards and deposit costs lag-adjusted downward, the bank is now harvesting the type of positive real margin that has been the central operational target of Argentine bank management for years. The loan book is growing, fee income is contributing a larger share, and the funding base is split between transactional deposits and inflation-linked time deposits in a way that is more navigable than it was a year ago.

The dominant risk to this thesis is not idiosyncratic. It is the same risk that has driven every Argentine asset over the last decade: whether the disinflation regime holds through the 2026 midterm cycle and into the 2027 presidential window. A reversal of the fiscal anchor that has driven the CPI collapse would compress real ROE back into the single digits and reset the multiple. The falsifiable clock is the next monthly inflation print, the next central bank rate decision, and the next major cabinet shuffle that would signal a shift in policy posture. None of these can be controlled from the bank, which is why the trade is being made against the macro framework rather than against the company itself.