Petrobras falls 14% in four trading sessions and experiences worst week since 2021

The Brazilian stock exchange records strong volatility and has the state-owned oil company as its main focus of attention this week. According to Revista Oeste, Petrobras shares have accumulated a 14% drop in four trading sessions, heading towards their most negative weekly result since February 2021.

The sharp drop placed the company's shares at the bottom of the main Brazilian stock index in the period. As Revista Oeste found, the closing of last Friday showed new lows for assets, with a decline of 0.77% for PETR3 and 1.76% for PETR4.

The downward movement on the stock market did not occur in a vacuum, but was motivated by external factors relevant to the commodities market. According to Revista Oeste, the devaluation of Petrobras was motivated by the decline in Brent oil and negotiations between the United States and Iran.

Historically, losses of this magnitude in the oil company bring back memories of political interventions in the economy, although the current scenario is dictated by global factors. Revista Oeste recalls that the last previous drop of a similar proportion occurred in the period from February 19 to 22, 2021, at a time when shares plummeted by more than 20% due to threats of interference from Jair Bolsonaro in the management of the state-owned company.

Meanwhile, the international scenario reflects widespread caution among risk operators in several financial markets. Bloomberg reported that U.S. retail investors were buying stocks cautiously after the worst day since 2025, while the Canadian dollar recorded an unprecedented weekly drop since the end of September, driven by weaker-than-expected employment data.

What changes for the investor

The significant collapse of the main Ibovespa company directly affects the mood of institutional and local investors, changing the risk allocation on the Brazilian stock exchange. Intense movements in highly liquid assets require portfolio reassessment given the volatility of the energy sector and fluctuations in oil prices on the international market.

X-Trader Analysis: what changes for those who trade

Petrobras has one of the biggest weights in Ibovespa, so a 14% drop in four trading sessions pulls the entire index down. This time the reason comes from outside, with the retreat of Brent and the negotiations between the United States and Iran, and not from political interference as in 2021. For those who operate a mini-index, following oil during the trading session helps to understand part of the WIN movements. When Brent fluctuates strongly, the oil company usually takes the index with it.

Automatically translated from Portuguese.