Milei Thumped in Buenos Aires Province as Peronists Surge — and Markets Flinch

President Javier Milei’s big political stress test just went sideways. In Argentina’s largest and most decisive battleground, Buenos Aires province, his upstart La Libertad Avanza pulled about 34% of the vote, while the Peronist opposition cruised to roughly 47% — a bruising 13-point gap.

“A clear defeat,” Milei admitted, promising some self-criticism but no retreat from his shock-therapy economic agenda.

It’s the bellwether. Buenos Aires province is home to nearly 40% of Argentina’s voters. A double-digit loss here isn’t just a stumble — it’s a flashing warning light ahead of October’s congressional midterms, where Milei needs seats to turn decrees into laws.

Congress is the choke point. Peronists remain the largest bloc and have been flexing their muscle with social-spending bills that complicate Milei’s push to balance the budget and deregulate the economy.

From the balcony of her Buenos Aires home, Cristina Fernández de Kirchner basked in the win, needling Milei online and signaling a Peronist revival just as he battles a corruption scandal swirling around his powerful sister, Karina.

Buenos Aires governor Axel Kicillof seized the moment, blasting austerity and positioning himself as the movement’s standard-bearer: don’t cut schools, pensions, or public works.

Contrite but defiant. Milei told supporters his coalition would “internalize” mistakes and adjust tactics — without abandoning the overhaul. Translation: expect the same macro playbook, maybe sharper political discipline.

Yes, monthly inflation has cooled from last year’s inferno and currency rules have been unwound under a $20B IMF program. But voters aren’t feeling a rebound: confidence is sliding, unemployment is ticking up, and sky-high rates have choked credit. Foreign capital hasn’t arrived in the volumes needed to turn austerity into growth.

Markets noticed — fast

• Peso: off nearly 5% to about 1,434 per dollar.
• Stocks: Merval −10.5%; Argentine ADRs in New York down 15%+.
• Bonds: dollar notes led global EM losers; the 2035s fell to about 56–57 cents on the dollar.
  Traders had braced for a narrow Peronist win; a 13-point rout screamed weaker reform odds and more FX pressure. The dilemma now: let the peso slide or spend scarce reserves — either path carries risks for the IMF deal and debt sustainability.

Buenos Aires was a gut punch. Milei’s mandate to remodel Argentina just got narrower, investor patience got thinner, and the October midterms now loom as a make-or-break moment for his entire reform project.

Reuters, AP, Bloomberg, and the Financial Times contributed to this report.