AbnormalReturns

A study published this year found that stocks purchased by House of Representatives members from 1985 through 2001 "earn[ed] statistically significant positive abnormal returns," outperforming the market by more than six percentage points a year. And senators, it appears, have done even better.

The purchase of investment blog Abnormal Returns by Twitter-like Stocktwits may signal a new trend in online finance: It's called the real-time Web. Investors can get an instant snapshot of the sentiment of other investing pros by joining an immediate and constant online conversion.