Short interest is the number of shares that have been sold short but have not yet been covered or closed out. Short selling is when a trader sells shares of a company they do not own, with the hope ...

Regeneron’s shares (currently trading at $552.99) have posted a disappointing 18.9% loss, well below the S&P 500’s 4.5% gain.

Ligand Pharmaceuticals shows improving price performance, earning an upgrade to its IBD Relative Strength Rating from 80 to 84.