Profitable Trade: SLV Naked Puts

The following SLV naked puts expired worthless in a taxable account:

01/19/2012    STO 6 SLV Jan 27 2012 28 Puts @.15        75.46

In this 8 day trade the puts expired worthless This trade earned a 2.94% return on margin maintenance of $2568.00 which equates to 134.1% annual.