• Milei victory boosts investor confidence in economic reforms
• Stocks traded in US exchanges soar over 30%
• Investors eye possible reform of currency framework

NEW YORK/LONDON, Oct 27 (Reuters) - Argentina's bonds, stocks and currency rose sharply on Monday after President Javier Milei's party won a decisive victory in Sunday's midterm election, a key requisite to keep economic reforms on track and a U.S. financial backstop in place.

International bonds rallied between 7 and 13 cents each, local stocks jumped 22% and the peso strengthened some 4% to the dollar, after an initial near 15% rally.

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Official election results showed voters strongly backed Milei's free-market reforms despite some painful austerity measures. Inflation has fallen sharply since he took office nearly two years ago.

The unexpectedly strong showing came after the U.S. pledged a combined $40 billion to support Milei - a $20 billion central bank swap line and a potential $20 billion loan facility - and implied the backing was contingent on Milei continuing with his reform agenda.

"His victory was so, so much larger than expected," said Thierry Larose, portfolio manager at Vontobel Asset Management. "Previously he was in a state of survival, and now he's ... in a very strong position to try to form tactical alliances and push some reforms that were completely out of reach."

ARGENTINE ASSETS RALLY

The president's party, La Libertad Avanza, received 41.5% of the vote in Buenos Aires province compared with 40.8% for the opposition Peronist coalition, a dramatic shift for a place that has long been a Peronist stronghold. Nationally, LLA took over 40% of the vote, a much better-than-expected result.

"Critically, Milei’s victory speech was notably moderate and cooperative, signaling willingness to work with non-LLA legislators on reforms," Christine Reed, emerging market fixed income portfolio manager at Ninety One, said in a note.

The country's international dollar bonds were pushing against historic highs posted earlier this year, with the 2038 maturity up 13 cents to 73 cents on the dollar.

U.S.-listed shares of Argentine companies also surged, with financial shares rising up to 48% and the Global X MSCI Argentina ETF adding 19%, after falling 10% year-to-date through Friday. Stocks traded on U.S. exchanges (.BKAR) , opens new tab jumped 32%.

The local stock benchmark (.MERV) , opens new tab posted its largest daily percentage gain since late November 2023, when investors were reacting to Milei's presidential victory. It ended the day up 21.8%.

The interbank peso initially strengthened near 15% to the dollar at 1,300 per greenback and ended the day 4.3% stronger at 1,430 per greenback.

The currency's strength makes sense, especially with the backdrop of U.S. support, according to Matthew Graves, portfolio manager for emerging market debt at PPM America.

"The government has some breathing room now, and can take next steps from a position of relative strength," he said. "We still think the FX bands are better used as a tool to facilitate a transition to more of a true managed-float FX framework. Investors will be keen to understand what this path might look like, and how it will facilitate a more rapid accumulation and rebuild of FX reserves."

FASTER REFORMS, CLEARER PATH

The results could clear the way for Milei to speed up one of the most ambitious economic overhauls in the cash-strapped and inflation-ridden country's recent history.

Argentina's assets have been on a rollercoaster ride since Milei's party suffered a wider-than-expected defeat in a provincial vote in Buenos Aires last month.

The peso had weakened some 25% since mid-April's partial scrapping of foreign exchange controls, and close to 30% since the start of the year. On Friday, it touched a record closing low of 1,491.50 per dollar.

Argentina's international dollar bonds were among the worst-performing emerging market high-yielders this year to Friday, after having returned over 100% to investors in 2024 (.JPMEGDARGR) , opens new tab.

Now, the stronger position for Milei's party in the legislature will encourage more investment, investors have said, as electoral risk recedes. It also boosts hopes for reform-minded candidates in the next general ballot in 2027.

"The midterms yesterday just give a longer horizon for potential foreign investments, both in financial assets and in real assets," said Graham Stock, senior sovereign strategist with RBC BlueBay Global Asset Management.

While some still anticipate a reform to the foreign exchange framework that would encourage the accumulation of reserves, with a wider band or a free float of the peso among the options, confidence in Milei's reform outlook could naturally strengthen the currency, RBC's Stock said.

Carmen Altenkirch, an emerging markets sovereign analyst at Aviva Investors, said the results could kick off a "virtuous cycle" in which locals begin selling dollars again.

"I think a stronger exchange rate is feasible," Stock said, adding that depleted dollar reserves were a key weakness.

"They need to take advantage of peso strength to buy up dollars and build those reserves up, which they can do with the current regime," he said.

https://www.reuters.com/world/americas/argentine-markets-expected-rally-after-mileis-election-victory-2025-10-27/