It is far from clear how much distressed debt the government will end up purchasing, though it seemed likely that the $700 billion figure was large enough to send a reassuring message to the jittery markets. There are estimates that firms are carrying $1 trillion or more in bad mortgage-related assets.
The ultimate price tag of the bailout is virtually impossible to know, in part because of the possibility that taxpayers could profit from the effort, especially if the market stabilizes and real estate prices rise.
(via) That's printed in the paper of record.
We'll see if there's a correction today.