Argentina Markets: Merval & the Peso — August 5, 2026

01 The session in one read

Buenos Aires equities slumped on Tuesday in a session that felt heavier than the headline numbers suggest. The S&P Merval — the benchmark index that tracks Argentina’s leading companies listed on the BYMA exchange — tumbled 2.61% to settle at 3,188,971, giving back ground after weeks of choppy trading tied to the Milei reform story.

The peso, meanwhile, weakened 0.15% to close at 1,496 per US dollar. That keeps the currency within 0.2% of its 52-week high of 1,500, a level many traders watch as an informal red line for official depreciation.

Volume was concentrated in a handful of names. Grupo Galicia, the banking group, and YPF, the energy producer, together accounted for nearly $30 million in turnover, but both posted chunky losses — 2.9% and 3.3% respectively. The irony of the session was the contrast with New York: the S&P 500 rallied 1.79%, yet Argentine assets could not catch that tailwind.

For foreign investors watching from São Paulo, New York or London, the message was clear: the Milei reform trade, which supercharged the Merval after the libertarian president’s 2023 election win, is encountering a rough patch as the market demands proof of sustained policy delivery.

02 The day’s numbers

Merval — Source: RT close, 2026-08-04. Figures rendered directly from the feed.

The Merval’s 2.61% decline was the standout figure of the day, signalling that sellers had the upper hand from the open. While the session range isn’t available from our scan, the close near the day’s lows suggests there was little appetite to buy the dip.

On the currency side, the peso’s 0.15% slip to 1,496 leaves it dangerously close to the 1,500 mark — its weakest level over the past 12 months. A move through that threshold would likely make headlines in Buenos Aires and could prompt a central-bank response.

03 Why it moved — profit-taking in the reform trade

The simplest explanation for Tuesday’s sell-off is that investors are cashing in on the Milei rally. Since the libertarian president took office in December 2023, the Merval has been one of the world’s best-performing indices in local-currency terms, driven by hopes that his shock-therapy programme — spending cuts, deregulation, and a push to tame inflation — would eventually stabilise the economy.

But reform fatigue is a real risk. Congressional battles over key legislation have been grinding, and while the government has notched some wins, the market is now asking what comes next. Country risk — measured by the EMBI Argentina spread — tends to rise when that question goes unanswered, and Tuesday’s price action suggests bond traders may also have been edgy.

Energy stocks bore the brunt of the selling. YPF, which is both a Merval heavyweight and a proxy for Argentina’s Vaca Muerta shale ambitions, fell 3.3%. Pampa Energía, another large-cap name spanning power generation and oil and gas, dropped 2.5%. When the two main energy plays slide in unison, it is usually a sign that macro flows — not company-specific news — are driving the tape.

Banks were also in the firing line. Grupo Galicia’s 2.9% decline on heavy turnover points to foreign investors trimming exposure to Argentine financials, which are highly sensitive to shifts in inflation and interest-rate expectations. Banco Macro was also notably weaker, catching the same downdraft.

04 The day’s movers

The domestic board was painted red. Transportadora Gas del Sur, a natural-gas pipeline operator, was the worst performer among local names, tumbling 4.7%. Energy and financials — the two sectors most exposed to Argentina’s macro swings — dominated the losers’ list, with YPF, Pampa Energía and Grupo Galicia all posting chunky declines.

One notable entry on the volume leaderboard was Palantir Technologies, a US-listed software company whose Buenos Aires CEDEAR — a locally traded certificate that tracks the New York share — surged 28.8% on $12 million in turnover. That move reflects events in the US after Palantir’s earnings report, not any Argentine dynamic, and serves as a reminder that CEDEARs often simply mirror the Wall Street tape.

05 The regional scoreboard

Argentina was the clear laggard among Latin American markets on Tuesday. The Ibovespa, Brazil’s main stock index, was essentially flat, dipping just 0.06% to 177,895, while Mexico’s IPC edged up 0.20%. Chile’s IPSA shed 0.48% and Colombia’s COLCAP lost 0.42%, both modest moves compared with the Merval’s 2.61% plunge.

The real divergence was with the US. The S&P 500 jumped 1.79% and the tech-heavy Nasdaq surged 2.59%, suggesting that global risk appetite was strong. Argentine equities’ inability to join that rally points to a local catalyst — most likely renewed caution on the reform outlook. The live market board above carries the verified regional closes.

06 The technical picture

From a technical perspective, Tuesday’s 2.61% drop pushes the Merval decisively away from recent highs, though the index remains well above its levels before the Milei rally took hold in late 2023. The speed of the decline matters: a single-session move of this size often triggers momentum-based selling from algorithmic traders who cut positions when an index breaches short-term moving averages.

On the currency chart, the peso’s drift to 1,496 puts the USD/ARS pair within a hair’s breadth of the critical 1,500 mark that marks the top of its 52-week range. A clean break above that level would signal that the official depreciation pace is accelerating, and historically, Argentine stocks have tended to sell off when the peso weakens at an unexpected clip.

07 What to watch

• USD/ARS 1,500 level: A breach of the 52-week low would signal accelerating depreciation and could rattle both equity and bond markets.
• EMBI Argentina spread: Watch for any widening of the country-risk index, which would confirm that bond traders share the equity market’s caution.
• YPF and energy sector flows: With Vaca Muerta ambitions central to the growth narrative, sustained selling in YPF would be a warning sign for the broader reform trade.
• Congressional reform progress: Any headline on the Milei administration’s legislative agenda — tax, labour or deregulation bills — could reverse or deepen the market’s mood.

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Background: Argentina’s Central Bank Opens Door to Dollar Payroll Accounts.

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

Frequently Asked Questions

What is the S&P Merval?

The S&P Merval is Argentina’s main stock-market index, calculated by the Buenos Aires exchange (BYMA). It tracks the shares of the country’s largest and most actively traded companies.

Why did the Merval fall on August 4?

Argentina’s benchmark index dropped 2.61% as investors took profits on the so-called Milei reform trade. Extended valuations, a lack of fresh policy catalysts, and a weak peso all contributed to the sell-off.

What is a CEDEAR?

A CEDEAR is an Argentine certificate of deposit that represents a foreign share — often a US stock — and trades on the Buenos Aires exchange. Moves in CEDEARs typically mirror the US market rather than local Argentine conditions.

What does USD/ARS 1,500 mean for Argentina?

The 1,500 level is the peso’s weakest point in the last 52 weeks. Traders watch it closely because a break above that mark would indicate the official exchange rate is being allowed to depreciate faster, which can affect inflation and corporate earnings.

This article was produced by The Rio Times’ automated newsroom system. How we use AI · Report an error

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