1. Sorry, did not read all your points, but the figures in the 10k are net figures they include net interest expense already! You also have to subtract administrative expenses but they are rather small in the scheme of things.
2. The rest of your post keeps citing figures from 2007-2008, I and the plaintiffs are looking into the reality of 2011 and 2012. This is what the court cases are about not 2008! What happened in 2008 has little to do with
overstating reserves in 2012.
3. Now, you could perhaps loan the gse's an extra 20 billion and count as excess capital on the same the terms as the banks got. Then simply allow them to pay it back! Don't shove into reserves as "losses" in the name of conservatism and preparing for some future problems. Finally you don't charge the usury rate of 10% on money that " we think you might need some time in the next 30 years".
4. On your point #3. On every loan in the guarantee book either there is mortgage insurance or the borrower put 20% down. I am talking about the guarantee book for which reserves are allocated not the held portfolio which is much smaller and was largely written down by 2011 anyway. That's what the dated Barrons article was referring to.