No reason to short GLW, here is why?
AVNX may miss its 3th quater and cut 370 job! this bad news effect whole optical sector! Without this bad news whole optical sector will up as Semiconductor over 15-25%, as you saw AMCC, VTSS, QLGC.... But I believe this is just a short term effect, you will see soon optical sector up as they did usualy. I even believe GLW will close ~$24 today, and JDSU will be at ~$21!
If it's true that now it is the end of bear, I like to say that you will see GLW and JDSU ~$60-80 soon!