First Solar (FSLR +23.8%) guides on its analyst day for 2013 revenue of $3.8B-$4B and EPS of $4-$4.50, far above a consensus of $3.15B and $3.46. Shares have spiked higher on the news, and were shortly halted due to volatility. Other solar names are also surging: SPWR +9.8%. TSL +8.7%. DQ +12.3%. STP +36.1%. LDK +15%. JKS +15.4%. WFR +7.5%. JASO +6.6%. (previous) Update (1:56): First Solar shares are now up 48.2%, and have been halted again. CNNMoney's Paul R. La Monica notes over 1/3 of the float is shorted. "Can you say squeeze?"