Watson Pharmaceuticals (WPI): Some 17,000 May 75 calls were purchased, mostly for $0.60, but volume was below open interest in the strike. WPI fell 1.34 percent to $72.80.
Yahoo (YHOO): About 10,000 June 14 puts were bought for $0.45, but volume was below open interest in the strike. YHOO fell 0.29 percent to $15.32.
Morgan Stanley (MS): More than 19,000 January 15 puts were bought, mostly for $0.19, but volume was below open interest in the strike. MS fell 1.14 percent to $15.66.
