Elsewhere in commodity markets, the April gold contract gained $4.70 to $1,426.50 an ounce. The April Natural gas contract rose 2 cents to $3.91 per British thermal unit on expectations that Japan's nuclear crisis would drive up demand.Natural gas plays were firmly in positive territory at the end of the trading session. Chesapeake Energy (CHK) rose 2.3% to $33.56, Southwestern Energy (SWN) gained 4% to $38.38 and Range Resources (RRC) added 2.9% to $49.92. Specialist LNG shippers saw their stocks rise sharply. Tsakos Energy (TNP - Get Report) advanced 7.8% to $10.11, while Golar LNG (GLNG - Get Report) jumped 9% to $20.32, having earlier touched $20.53, a 52-week high. The benchmark 10-year Treasury was up 9/32, with the yield weakening to 3.369%. The dollar weakened against a basket of currencies with the dollar index down by 0.5%. . --Written by Shanthi Bharatwaj and Andrea Tse in New York.