Rubicon Technology (RBCN +9.1%) falls 8.5% AH after warning it expects Q1 revenue of $10M and EPS of -$0.15, below a consensus of $10.3M and -$0.10. It also expects Q2 revenue of $15M-$18M and EPS of -$0.10 to -$0.14, compared with a consensus of $15.9M and -$0.01. Rubicon blames costs related to a new LED wafer contract, and a difficult pricing environment. Shares rallied earlier thanks to Veeco's strong Q1 report.