I think now that AAPL is out the way and the BP situation is stablizing, the Euro banking stress test on Friday will be the biggest event remaining. Unemployment reports will still matter, but not as much as the stress test results.
Just as I mentioned yesterday that IBM's disappointing earnings weren't indicative of where the market would go today, a fantastic report by AAPL also doesn't mean the market will close in the green tomorrow. Being a contrarian really pays off in today's market.
The fact that it dropped to as low as $256 within 20 minutes is not a good sign what is going to happen tomorrow. This happened to INTC last week and we had our big drop not too long after.
Bernanke's speech to Congress is just a headline. There are many events that were largely ignored. While volume was ok today, it's nowhere near a free-fall. We will get a rebound tomorrow.