You know those spams you get touting penny stocks? It turns out they actually work. "The team found that a spammer who bought shares the day before starting an e-mail campaign and then sold them the day after could make a return on his or her investment of 4.9%. If he or she were to be a particularly effective spammer, returns to this strategy would be roughly 6%."
Update: NPR report on the spam stocks study. (thx, jeff)
