Shares in Skechers USA jumped by more than 15 percent on Dec. 1 after the company announced that its founder and chief executive, Robert Greenberg, snapped up $11 million worth of stock in a move that analysts interpreted as a bullish stance on 2017 prospects. Greenberg, who acquired 500,000 shares in the open market, had not purchased any of Skechers' shares in the last ten years. The retailer has enjoyed double-digit annual revenue growth since 2013 by capitalizing on casual athletic trends, but that growth began cooling down last year as investors started to lose their appetite for the stock, leaving it down 60 percent from its record high in 2015.