Select Medical's stock price fell sharply by 5.72% during intraday trading following the release of its quarterly earnings report.

The healthcare facilities operator reported adjusted earnings of 16 cents per share for the quarter ended December 31, which missed analysts' average expectation of 23 cents per share. While the company's revenue of $1.40 billion exceeded the $1.36 billion forecast, the earnings shortfall appears to have triggered the selloff.