Argentina Markets: Merval & the Peso — September 12, 2026

01 The session in one read

Argentina’s S&P Merval took a breather on Friday, falling 1.87% to 3,098,897.55 points. It was a rare down day for a market that has been on a tear — the index is still up more than 70% over the past 12 months.

The day’s move was broad, with heavyweight banks and energy names leading the decline. YPF, the state-linked oil producer and the session’s most-traded stock, slipped 1.8% on roughly $30 million in turnover.

The peso bucked the soft equity tone, firming about 0.28% to close near 1,508 per dollar. That resilience matters: it suggests the currency’s managed float, a pillar of President Javier Milei’s reform agenda, is weathering the stock-market wobble.

For foreign investors, the message is nuance. The reform trade is not breaking — it is pausing while traders digest a market that has run hard and a government that, for now, is holding back extra liquidity.

02 The day’s numbers

The Merval’s close below the 3.10 million mark is a psychological setback, but only a modest one. Live ticks late in the session clustered around 3,097,000 and 3,103,000, suggesting buyers were still lurking at those levels.

The peso’s daily range of roughly 1,508.81 to 1,512.81 per dollar, within the central bank’s much wider intervention band, shows the currency is not under stress. The band, set at 734.08 to 1,894.30 for the session, gives the market a lot of room before the monetary authority has to step in.

03 Why it moved — a position-squaring pause after a long rally

The most straightforward explanation is gravity. The Merval has delivered spectacular gains under Milei’s reform push — deregulation, fiscal tightening and a managed peso — and no market goes up in a straight line forever.

Friday’s limp came after the economy ministry refinanced 103% of maturing peso debt, a solid result that nonetheless disappointed some traders hoping for a bigger liquidity injection. With no fresh fuel, investors chose to bank some gains.

The softer tone in energy and banking shares is telling. These are the sectors most tied to the reform story — YPF for energy policy, Galicia and Macro for the financial system’s health — and they have been the engines of the rally.

Yet the firmer peso complicates any simple risk-off narrative. If investors were truly running from Argentina, the currency would not have strengthened. This looks more like a mature market digesting its own success.

04 The day’s movers

The day’s biggest moves came from smaller, less-liquid names: Transener, which runs high-voltage power lines, jumped 2.4% on modest turnover. Gas transporter TGS fell 3.4%, while BBVA Argentina dropped 3.2%.

Cross-listed CEDEARs — Argentine certificates that track foreign shares — reflected the mixed picture. Google parent Alphabet’s CEDEAR rose 1.7%, but energy explorer Vista fell 3.7%, showing how the currency and moves in US markets pull these instruments in different directions.

05 The regional scoreboard

It was a broadly down day across Latin America. Brazil’s Ibovespa, the region’s largest index, fell 0.56%, while Chile’s IPSA was nearly flat. Colombia’s MSCI Colcap had the weakest performance after Argentina, dropping 1.41%.

For Argentina, the underperformance is notable but not alarming given the size of its 12-month rally. The live market board above carries the session closes for the full regional set.

06 The technical picture

The Merval’s 1.87% decline brought it back to test the 3.10 million level, which has acted as a floor in recent sessions. The index closed just below that mark, leaving it within easy reach of a quick recovery if buyers return on Monday.

The intraday range of roughly 3,042,365 on the high side and 2,991,150 on the low shows volatility is picking up as the index consolidates after its run. That is normal after a strong advance.

The 52-week picture remains bullish. The index is still up more than 70% year-on-year, near the top of its range, and the peso is within 0.4% of its strongest level against the dollar in that period.

Technicians will watch whether the Merval can hold above 3 million on any further weakness. A decisive break below that round number would signal a deeper correction, while a quick reclaim of 3.10 million would reinforce the uptrend.

07 What to watch

• Weekend news flow: Any Milei government announcements on fiscal policy or the peso band could set Monday’s tone.
• Peso stability: If the currency holds near 1,508-1,510, the reform trade remains intact; a slide toward 1,514 would raise eyebrows.
• YPF and energy shares: The sector’s heaviest volume makes it the clearest signal for institutional sentiment.
• Central bank liquidity moves: Whether the monetary authority adds or drains pesos will determine how much fuel the market has for another leg up.

Background: Argentina Inflation Falls to 1.7 Percent, Lowest in 14 Months.

Background: Argentina’s Top Economic Officials Clash Over Jobs.

More: Argentina news in English, every day from The Rio Times.

Frequently Asked Questions

What is the Merval?

Argentina’s benchmark stock index, tracking the largest companies listed on the Buenos Aires exchange, quoted in pesos.

Why did the index fall 1.87%?

Investors took profit after a huge rally, and the government’s debt auction added no fresh liquidity to the market.

Why did the peso get stronger while stocks fell?

The managed float under President Milei’s reform plan has kept the currency stable, and a firmer peso shows investors still trust the adjustment story.

Is the Milei reform trade over?

No. The index is still up more than 70% over the past year, and the peso is near its strongest level in 52 weeks — this looks like a pause, not a reversal.

Market data: RT; exchange figures from BYMA

This article was produced by The Rio Times’ automated newsroom system. How we use AI · Report an error · Editorial responsibility: Matthias Camenzind, Editor-in-Chief

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