One set of investors who weren’t shy about diving into the stock market in the runup to the current selloff was corporate insiders. A total of 1,341 officers and directors of American companies purchased their own stock this month while 2,013 sold, according to data compiled by Washington Service and Bloomberg. “Maybe the executives recognize a correction can happen, but they believe in their business enough in terms of longer term to just go ahead and buy in front of it,” said Charles Smith, chief investment officer at Fort Pitt Capital Group Inc.