The current OCT target price is just below $23. At that point over 120,000 call options will expire worthless or at greatly reduced prices. At that point I would look at selling the JAN 2014 $20 PUT's.
At this point NOV target price is $24, so some money can be made on the put trade. You may not want to hold the put position into JAN 2013 as the target price is $21.
At worst case you could end up owning PFE for just over 18 and a yield of 4.8%.