Solar stocks rose after Citigroup said the U.S. House of Representatives is likely to propose a new bill that will extend the solar investment tax credit for several years, longer than the one-year extension that has recently been discussed. The firm noted the House hopes to pass a bill before the Memorial Day recess; however, nothing is imminent as the bill could face meaningful revision. Citi also noted the entire sector would benefit from tax credit extension, although SunPower Corp. (SPWR, $89.00, $4.60, 5.45%) is widely regarded to have the most leverage to an extension. First Solar Inc. (FSLR, $303.98, $19.14, 6.72%), Suntech Power Holdings Co. (STP, $44.79, $3.19, 7.67%) and Emcore Corp. (EMKR, $7.51, $0.59, 8.53%) were among several solar stocks moving higher in Tuesday's trading session.