Vertex Pharmaceuticals ( VRTX 3.06%) might be one of those special cases. Should you buy Vertex stock hand over fist before Jan. 30? What's so special about Jan. 30 for Vertex? It's the PDUFA action date set by the U.S. Food and Drug Administration (FDA) for making an approval decision on suzetrigine in treating acute pain.

Vertex Pharmaceuticals Inc. closed 19.80% below its 52-week high of $519.88, which the company reached on November 8th.

Vertex Pharmaceuticals (NASDAQ: VRTX) is a biotechnology company with a strong track record of success in developing treatments for cystic fibrosis (CF). Vertex is strategically expanding into the pain management sector,

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 that the price will fall. Traders make money from short selling if the price of the stock falls and they lose if it rises.

Vertex Pharmaceuticals Inc. closed 18.39% short of its 52-week high of $519.88, which the company reached on November 8th.