"Stocks were up Thursday for American Outdoor Brands, the company that makes the AR-15 rifle used in the Florida school shooting that claimed 17 lives. The company’s shares closed up 1.49%, netting the company an additional $8.8 million on the day. The Associated Press reported that accused gunman Nikolas Cruz used a Smith & Wesson M&P15 rifle – a variant of the AR-15 – during his allegedly shooting spree at Marjory Stoneman Douglas High School in Parkland, Florida, on Wednesday. Smith & Wesson, which was founded in 1852, is a Springfield, Mass.-based holding of American Outdoor Brands.... Shares of American Outdoor Brands closed 5.6% higher on Wednesday, the day of the shooting. It’s not uncommon for gun maker shares to rise following a mass shooting as people are likely to stock up fearing potential gun control measures. This is the third time an M&P15 has been used in a mass shooting in the United States. James E. Holmes, who was convicted of killing 12 and wounding 70 in the 2012 Aurora, Colorado movie theater shooting, used a Smith & Wesson M&P15 rifle. An illegally modified Smith & Wesson M&P15 Sport rifle was recovered by law enforcement officials after the 2015 San Bernardino shooting, where 14 people were killed."