USO Drops 5.19%, Dragging Petrobras, YPF, Ecopetrol Down

” alt=”Oil daily market wrap.” />Oil — the daily wrap. (Photo internet reproduction)

01 The session in one read

Oil proxies suffered a sharp retreat on Tuesday as the US Oil Fund, the exchange-traded vehicle that tracks West Texas Intermediate crude futures, closed 5.19% lower at US$115.78. The drop radiated across Latin America, dragging down the New York-listed shares of Petrobras, YPF and Ecopetrol by between 1.75% and 2.78%.

The driver was a compound of tepid demand signals from China and Europe, soft refinery margins and the nagging weight of rising supply from the Americas. For Brazil’s pre-salt, Guyana’s deepwater boom, Mexico’s indebted Pemex, Argentina’s Vaca Muerta and Venezuela’s constrained output, the session reaffirmed that global benchmark prices remain the ultimate arbiter of fiscal health and project economics.

02 The board

The US Oil Fund, which holds WTI futures and cash collateral to track daily moves in the American benchmark, anchored the sell-off at US$115.78. Petrobras, the foreign-investor proxy for Brazil’s pre-salt, fell 1.78% to US$18.72, while Argentina’s premier shale name YPF dropped 2.78% to US$49.64 and Colombia’s Ecopetrol eased 1.75% to US$16.31.

The uniformity of the declines underscored how tightly Latin America’s national oil companies remain tethered to the WTI curve. When the futures structure weakens, funds that blend energy with metals and agriculture, such as the CM Commodity Index Fund with its 31.18% energy allocation, transmit the pressure into index-driven flows that amplify the moves in individual producer shares.

Source: EODHD close, 2026-08-04. Where a commodity has no spot feed, an exchange-traded tracker or leading producer is shown as a labelled proxy.

What Petroleo Brasileiro Petrobras does. Petróleo Brasileiro S.A. – Petrobras explores, produces, and sells oil and gas in Brazil, China, the United States, the Americas, Asia, Europe, Singapore, and internationally. It operates through three segments: Exploration and Production; Refining, Transportation & Marketing; and Gas & Low Carbon Energies. The Exploration and Production segment explores, develops, and produces…

03 What moved it

Soft refinery margins and deteriorating macroeconomic readings out of China and Europe catalysed the day’s risk-off mood. Traders interpreted the data as a signal that industrial activity and consumer fuel demand would require less crude feedstock in the months ahead, right as incremental barrels from the Americas continue to reach the market.

The futures curve structure added a technical headwind. Because the US Oil Fund rolls positions monthly, the fund must sell near-term contracts and buy longer-dated ones, a process that erodes returns when the market is in contango. This mechanical drag compounded the fundamental demand worries, sending the WTI proxy to its 5.19% loss.

04 The Latin American read

For Brazil, the 1.78% drop in Petrobras shares was a reminder that the pre-salt’s long-cycle investment case depends on a robust crude price. Debate over the government’s domestic fuel pricing policy added a local layer of uncertainty, making the stock a barometer of both geology and political risk in Brasília.

Argentina’s Vaca Muerta felt the chill through YPF, where the 2.78% slide to US$49.64 combined the global crude headwind with chronic macroeconomic jitters. In Mexico, Pemex’s absence from New York equity markets meant the strain showed up in credit spreads and sovereign risk rather than a share price, but the fiscal logic was identical: lower benchmarks reduce the cash flow needed to service heavy debt and fund upstream work.

05 The names to watch

Guyana remains Latin America’s most closely watched supply story, yet its growth is priced through ExxonMobil and its partners rather than a domestic listing. A sustained dip in WTI-linked funds reduces the net present value of the consortium’s high-capex deepwater projects, even as production volumes at the Stabroek block climb.

Venezuela’s heavy-oil resources are still locked behind sanctions and operational decay, and a softer benchmark like today’s USO price cuts the potential upside if incremental barrels were to return to export markets. Across the region, the session made clear that Petrobras and YPF are the most liquid and sensitive proxies for foreign investors navigating Latin America’s oil cycle.

06 The outlook

The immediate path for Latin America’s oil equities will be set by whether Chinese independent refiners step up crude purchases in the coming weeks or whether European demand data continues to deteriorate. With the US Oil Fund now at US$115.78, the price floor that makes pre-salt and shale projects comfortably economic is being tested. A failure to find demand support would shift the conversation from growth capex to balance-sheet defence across the region’s dominant producers.

07 What to watch

• China crude purchases: Watch the next round of import quotas and independent refinery buying, as a pick-up would signal a demand floor and could halt the slide in USO.
• USO futures roll: Monitor the WTI futures curve for deepening contango, since a wider spread between near and distant contracts would add further mechanical losses to the fund.
• Petrobras fuel pricing: Brazilian government statements on domestic gasoline and diesel prices will determine whether Petrobras shares decouple from the crude move or amplify it.
• YPF capex guidance: Argentina’s Vaca Muerta drilling activity is a direct read on whether YPF can sustain output in a lower-price environment, so any capex revision is critical.

Frequently Asked Questions

Why did the US Oil Fund drop 5.19%?

Weaker demand signals from China and Europe combined with soft refinery margins to push WTI futures lower. The fund, which tracks those futures, reflected the move exactly.

How did the crude move hit Petrobras?

Petrobras shares fell 1.78% to US$18.72 because foreign investors treat the stock as a direct proxy for Brazilian offshore oil, which loses value when the WTI curve softens.

What does a lower WTI price mean for Vaca Muerta?

Argentina’s shale requires continuous drilling to maintain output, so a lower benchmark squeezes YPF’s projected returns. The stock dropped 2.78% to US$49.64 as a result.

Is Guyana’s oil boom at risk?

Production is still ramping up, but the valuation of deepwater projects depends on benchmark prices. A sustained decline in WTI-linked funds reduces the present value of future barrels.

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

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