I had just bought GILD a few days before the buyout around $40.00 as it looked like a good value. The buyout news sent it down about $4. I sold it for an approx 10% loss almost right away because I thought the deal was bad for GILD shareholders. Think of the EPS dilution they'll have with added shares, debt costs, etc.
Congrats on the MYL trade. I do some like that myself from time to time.