Crazy day on Wall Street

After being way down for most of the session, stocks made a big comeback in the last hour or so of trading. The Dow finished up 153 points, to 10,808. Why the switcheroo? Perhaps bottom feeding after several down days, perhaps a little short-covering - and perhaps some encouragement coming out of Europe. But the market dynamics have stayed pretty much the same - that is, there are many more reasons to sell than to buy.