GM building

What's up with General Motors? At 3:30pm ET, it was up 5.8 percent — that is a LOT for a low-beta stock like GM — and the volume was near 12 million shares, way more than the 7 million on a typical full day.

So what's up? There's no big news. One analysts noted that all the autos have been rallying, as they were deeply oversold on Europe fears. There may be a sense the selling has stopped for the time being.