Las Vegas horror drives predictable gun stock rally

The grim predictability of stock-market reactions to U.S. mass shootings-where before a final tally of casualties can be reached, shares of gun makers rise-continued Monday in the wake of a Las Vegas attack that killed at least 58 and wounded 515.Historically, gun stocks have experienced a bump after a mass shooting for reasons both political and emotional. Gun sales typically rise over concerns that a deadly event could lead to more stringent gun-control legislation. An additional driver of sal