Look what banks did yesterday immediately after the S&P downgrade.
Bank moves yesterday had nothing to do with any downgrades. The Fed lowered the cost of dollars yesterday in a last-ditch effort to stave of a bank run 10 days from now when the next EU summit fails.
...on the theory that whatever S&P downgrades must be solid. S&P a contra-indicator.
Ago is now (according to S&P) stable. "Stable" apparently has some juice........