Biopharma stocks are sensitive to a key binary event called the PDUFA date, the date by which the Food and Drug Administration is required to give its verdict on a regulatory application filed with it.
Marinus Pharmaceuticals Inc's (NASDAQ:MRNS) short percent of float has risen 9.74% since its last report. The company recently reported that it has 1.23 million shares sold short, which is 3.83% of all regular shares that are available for trading.