Sold Coca Cola (KO) Puts

With the DOW down ~300 to ~11500 and Coca-Cola down to ~65.58 I entered into the following transaction in a taxable account:

Sold 2 KO Dec 17 2011 62.5 Puts@.71                  +130.47

We'd be happy to own KO at ~62. Our yield on cost will exceed 3%. In addition, KO is set to raise the dividend next quarter. If the puts expire worthless we will earn 1.04% in 26 days or 14.65% annual. If one were to calculate return on margin (ROM) our return if the puts expire worthless, with an initial margin requirement of 1794.99, comes to 7.26% or 102% annual.