Energy companies — which have laid off more than 90,000 workers this year — continue to be hit hard by the oil supply glut. U.S. crude fell $2.32, or 6 percent, to close at $37.65 a barrel on the New York Mercantile Exchange, its lowest price since February 2009. Natural gas prices also fell. Among energy stocks, Consol Energy plunged $1.17 a share, or 15 percent, to $6.55 and Chesapeake Energy lost 29 cents, or 6 percent, to close at $4.26.