Profitable trade: Walgreen's (WAG) Naked Puts

On Friday I closed the following transaction for a profit:

5/30/12   STO  3 WAG Jul 21 2012 28 Puts @.41   $110.75
7/13/12   BTC  3 WAG Jul 21 2012 28 Puts @.03       -9.04

I was able to close the trade without paying commissions so I pulled the trigger. In this trade we made $101.71 in 44 days on ~$1200 in margin maintenance. This equates to a return on maintenance of 8.47% or 70.26% annual. I would have rolled out and/or down but with the recent rise of WAG above 30 I decided to wait. If and when WAG drops to 29 and change I will look to sell the 27 or 28's.