Short interest in ACI Worldwide Inc (NASDAQ:ACIW) increased during the last reporting period, rising from 2.28M to 2.31M. This put 3.18% of the company's publicly available shares short.

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

Based on the recent average volume of 544.33K shares traded per day, it would take 4.24 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.