Energy stocks were declining premarket Friday, with the State Street Energy Select Sector SPDR ETF (XLE) 0.7% lower.
The United States Oil Fund (USO) was down 3.8% and the United States Natural Gas Fund (UNG) was 1.2% lower.
Front-month US West Texas Intermediate crude oil was 3% lower at $99.43 per barrel at the New York Mercantile Exchange. Global benchmark North Sea Brent crude oil lost 2.9% to $104.56 per barrel, and natural gas futures were down 1.4% at $2.80 per 1 million British Thermal Units.
Petrobras (PBR) plans to increase diesel prices at its refineries by roughly 1 Brazilian reais ($0.20), though the state-run oil company is waiting for government measures to protect consumers from the move, Reuters reported, citing two company sources. Petrobras shares were down more than 1% pre-bell.