Short interest in TransAlta Corp (NYSE:TAC) increased during the last reporting period, rising from 5.91M to 8.54M. This put 2.87% of the company's publicly available shares short.

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

Based on the recent average volume of 648.23K shares traded per day, it would take 13.18 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.