U.S. Markets close in 4 hrs 55 mins

Beware of attractive V-Day bots carrying malware; most and least romantic US cities

IBM’s cyberthreat unit, X-Force, says attractive zombie bots will be cut loose in droves this week, hoping to lure in thousands of singles. Yahoo Finance’s Alexis Christoforous, Rick Newman and Ethan Wolff-Mann discuss how to detect these scams.