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This final note today, in which I once again bow down to the greater wisdom of Twitter.

I know, I know; I've said it before, but this time it comes with money attached. A couple of researchers at Indiana University did some analysis. Ten million tweets over an 8-month period in 2008. They looked at them for six factors: Happiness, kindness, alertness, sureness, vitality and calmness.

Turns out they can tell within a window of 2 to 6 days whether the Dow's going to go up or down.

There's more to it, of course on the blog of Technology Review. You can get the full analysis here.

Follow Kai Ryssdal at @kairyssdal