Stocks keep sliding... sliding... sliding

The Dow falls 155 points, to 12,442. That's 11 out of 12 days - and the last 30 minutes or so were especially bleak. There just isn't much appetite to buy stocks, especially with new concerns out of Greece. Meanwhile, the Facebook IPO is being priced at $38 a share, which is at the upper end of the projected range. That values the social network company at $104 billion. Facebook goes public on Friday.