Profitable Trade: Conoco Phillips (COP) Covered Calls

Yesterday in a traditional IRA I earned a profit in the following transaction:

01/13/2012    Bought 200 COP @ 70.29                               -14,067.97
01/13/2012    STO 2 COP Jan 21 2012 70 Calls @.99                   186.47
01/20/2012    BTC 2 COP Jan 21 2012 70 Calls @.77                  -165.52
01/20/2012    STO 2 COP Jan 27 2012 70 Calls @1.35                +258.45
01/30/2012    STO 2 COP Feb 18 2012 70 Calls @.58                 +104.47
02/16/2012    Sold 200 COP @ 70                                           13979.75

We made $295.65 when these shares were assigned. We held the shares for 34 days. Our rate of return was 2.1% which equates to 22.54% annual.