Quote from hrokling:
If Europe and Asia would have been down a total of 4-5% on Mon/Tue before US open they still could have done a surprise cut of maybe 50, but the extra oomph must have been caused by Soc Gen. And if the markets hadn't been down that much they could have waited until their scheduled announcement. So, I didn't mean that Soc Gen caused the whole thing but it became a catalyst that might have pushed both the timing forward and increased the size of the rate cut.
The Fed could still very well have cut 75 next week if they hadn't done the emergency one. As it is now, their timing is slightly off - they have to offer something more - and they already know that the 75 they did was probably as much as they should have done at the scheduled meeting.
Just my 2 cents of course. And yes, I know this might be what everyone says - but often the Fed can be quite predictable and "everyone" is right.