PRA Group (NASDAQ: PRAA) has made every effort to take advantage of the debt collection industry in which it operates, and the company has dealt well with somewhat adverse industry conditions that have weighed on its ability to do business in the manner it would prefer. Coming into Tuesday’s fourth-quarter financial report, PRA Group investors expected a modest drop in revenue and were prepared to see net income fall by roughly a third. What they weren’t prepared to see, though, was a huge plunge in sales that sent the company to a substantial loss.