Cosan (CSAN) Fell by Over 10% This Week. Here is Why

The share price of Cosan S.A. (NYSE:CSAN) fell by 10.45% between December 3 and December 10, 2025, putting it among the Energy Stocks that Lost the Most This Week.

Cosan S.A. (NYSE:CSAN) is a Brazilian conglomerate engaged in fuel distribution. It operates through Raízen, Compass, Moove, Rumo, and Radar segments.

Cosan S.A. (NYSE:CSAN) was among the Brazilian stocks that slumped on December 5 following reports that former Brazilian President Jair Bolsonaro had endorsed his son, Senator Flavio Bolsonaro, as the far-right candidate for the presidential election next October. The report was also confirmed by a social media post by the senator, who stated on X:

“It is with great responsibility that I confirm the decision of Brazil’s greatest political and moral leader, Jair Messias Bolsonaro, to entrust me with the mission of continuing our national project.”

This news sent Brazilian stocks falling, with the country’s benchmark stock index Bovespa down by over 4.3% and the Brazilian Real slipping as much as 3% against the US dollar, as investors were hopeful that the former president would nominate São Paulo Gov. Tarcísio de Freitas, who is viewed as a more market-friendly name with executive experience. Moreover, Bolsonaro’s decision has created a political risk environment in the country, as it could adversely affect the ties between the right-wing movement he forged and more centrist political parties.

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Disclosure: None.