IPO's: N/A Key Research: William Blair initiates TIF (mp), Think initiates CTXS (hold), Sterne Agee downgrades ATHN Key Research: Cantor initiates WFM/UNH/HUM (buy's) & AET/HNT/WLP (hold's), Raja downgrades EAT Key Research: GS downgrades COP/COL (sell) & upgrades TSO, Barcap upgrades AMAT, Multiple