While shares of Parsons Corporation (NYSE: PSN ) have mostly gone down over the past six months, the company has maintained its net income and earnings growth. That suggests an opportunity for investors—all else being satisfactory.Robert F. Abbott has been investing his family’s accounts since 1995, and in 2010 added options, mainly covered calls and collars with long stocks. He is a freelance writer, and his projects include a website that provides information for new and intermediate-level mutual fund inv ...