When insiders are selling significant stakes and they clearly don't care what people think is about the only time any clear conclusion can we drawn. As for buying, could be buy 1 onshore sell 5 offshore.
I am actually surpised that S&P, a propaganda arm of Wall St actually did this, I mean if they maintain AAA on ABK and MBI and flat REFUSE to downgrade AAA CDO'as that are in default because they are part of a crucial index then I have to wonder what the game is in doing this. Actually, the effect will be greater if they do it over a weekend as people have longer to let their imagination run riot. That is how it works.