According to Reuters, CBS Corp's stock dropped amid allegations of personal misconduct by its chief executive Leslie Moonves.
The broadcasting and media company's shares receded ahead of an article detailing the claims, which will be published by the New Yorker.
A statement from CBS the allegations against Moonves date back decades, but the board has not concluded an investigation into his conduct.
Moonves joined CBS back in 1995 as an entertainment president, and was appointed CEO in 2006.