The company's profitability is going in the wrong direction for many investors.Dialysis specialist DaVita (DVA -10.79%) had quite the Wednesday to forget, as investors sold out of its stock following the company's latest-earnings release. On the back of news that profitability was notably lower than expected, those folks left DaVita shares with a more-than 10% decline in value on the day. This was significantly worse than the 0.3% dip of the S&P 500 index that trading session.Revenue rose while profitabilit ...