Updated from 12:21 p.m. EDT
Remember Volatility?( At 5:35 p.m. EDT) I occasionally wonder if people who don't trade every day or cover the market for a living are aware of how frustrating it can be to try to keep up with the intraday movements and reversals. Sometimes what happens makes sense, other times it doesn't. The explanation for why stocks choose a direction on a given day can be simple and neat, but it isn't always. The market doesn't have to follow a set of rules or fit into readily definable categories. Today was one of those days. Upbeat open, selloff in the afternoon, rally in the closing minutes. Not the stuff for novices.