Combined with his big position in Wells Fargo, his deeply underwater warrants in Goldman and the General Electric warrants and you can see a concentration in an area with some of the most opaque balance sheets in the world.
In particular, note the double bottoms in the first two charts. A hold at these levels would be a nice entry point whereas cracking that support could set up 30 to 50% declines from here.
I'm going to flesh this out next week but for now here's some food for thought (three month charts):
Bank of America