Like the mean old guy in the movie "It's a Wonderful Life", when there is a run on the bank they will buy assets for pennies on the dollar.
GS was one of the ones who somehow got out of a lot of the toxic securities.
So..maybe a stock investment in GS might make some more money. If you can’t beat them..might as well make some money on it.
There was some run up prior to Buffett’s announcement..so there was a leak some where. Probably insiders in Wall St. and DC stocking up.