Energy stocks were lower Monday afternoon, with the NYSE Energy Sector Index falling 2% and the State Street Energy Select Sector SPDR ETF (XLE) dropping 2.1%.

The Philadelphia Oil Service Sector Index was decreasing 1.2%, and the Dow Jones US Utilities Index added 0.3%.

Front-month West Texas Intermediate crude oil fell 5.3% to $95.00 a barrel, and the global benchmark Brent crude contract shed 4.3% to $99.41 a barrel. Henry Hub natural gas futures declined 2.5% to $2.838 per 1 million BTU.

In corporate news, Constellation Energy (CEG) has signed a 15-year contract to provide Toyota (TM) in North America with renewable energy certificates from a Texas solar project, the companies said Monday. Constellation shares rose 4%.