Maybe I'm reading the post too literally, but here goes:
How many rate and spread scenarios have you calculated out to approx. April, 2016? Using the replies to your posting, you could enter all the data for rates, spreads, and future price per share for four different scenarios in about 40 minutes. Take another 15 minutes and enter the data for zero gain over 20 quarters. Be pessimistic and just crush the pps and the dividend yield over every quarter.
I think you will find that AGNC, IVR and other quality paper-holders are still ahead of most other investment categories.