I agree that banks are a challenging arena, starting in the mid-90s when I was a very active day trader I have seen a few crazy things! These days I mostly trade futures, but this looked too good to totally pass up. When I bought Credit Suisse yesterday early AM, I did so as a quick speculation on the premise there would be some kind of emergency announcement later in the day due to its systematic importance, "too big to fail." There was one, rather low key, but it helped.
I picked up some shares at 1.87 with the ADR, the present bid is 2.32 so I am up about 24%. It will be a price-action judgement call later today whether to ride it a bit further or exit for a favorable return trip later on.
The Swiss Central Bank just bailed out CS to the tune of $54 billion so, they are pretty safe. I will keep it on my watch list until the downtrend ends. I do not mind paying a bit more if that is the case or taking it at a much lower price either.