Short interest in Merck & Co Inc (NYSE:MRK) increased during the last reporting period, rising from 30.93M to 34.12M. This put 1.35% of the company's publicly available shares short.

Short interest for Merck & Co gives investors a sense of the degree to which investors are betting on the decline of Merck & Co's stock. Short interest data is updated every two weeks.

Based on the recent average volume of 9.05M shares traded per day, it would take 3.77 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.