Some volatile solar stocks are jumping in early trading (TAN +2%). Possibly helping is a weekend WSJ column that notes U.S. solar installation doubled Y/Y in 1H12 thanks to plummeting prices, albeit while pointing out a lot of the installations involve foreign-made panels. Given heavy short interests, it often doesn't take much to produce a rally. CSUN +12.5%. STP +3.9%. CSIQ +3.6%. SPWR +3.1%. FSLR +2.4%. JKS +4.3%. TSL +4%. GTAT +10.5%. (previous)