These were Louisville’s best- and worst-performing stocks of 2015

The year past proved a tough one for mainstream investors. Year-to-date, the Standard & Poor’s 500 was virtually flat, and the Nasdaq gained just about 6 percent on the year. Yet there were some Louisville-based companies that really beat the markets for those savvy, or lucky, enough to hold onto them all year. The big winners didn’t include any of Louisville’s largest companies, but hotshot investors know the big money is to be found on the little guys, not the big dogs. And if you have a hot tip…