Profitable Trade: Proctor & Gamble (PG) Naked Puts

In a taxable account the following naked puts expired worthless:

01/23/2012   STO 4 PG Mar 17 2012 60 Puts @ .29             153.36

We earned 3.64% in 54 days on a margin maintenance requirement of $4209.60. This includes commission costs and equates to 24.6% annual.