Exactly, and it doesn't matter whether or not markets are actually efficient when it comes to explaining this price move. People were willing to pay what they p

Exactly, and it doesn't matter whether or not markets are actually efficient when it comes to explaining this price move. People were willing to pay what they paid for stocks yesterday. Today, news is better than expected. They'll now be willing to pay more. If they believe that markets are efficient, whether or not they actually are, that'll support buying even more. So better than expected news makes prices move up. The main point I'm trying to make is that this move isn't because traders are happy there's so much unemployment.