NEW YORK ( TheStreet) -- ACI Worldwide (Nasdaq: ACIW) is trading at unusually high volume Friday with 859,925 shares changing hands. It is currently at four times its average daily volume and trading up $3.80 (+12.1%) at $35.29 as of 3:20 p.m. ET. ACI Worldwide has a market cap of $1.05 billion and is part of the technology sector and computer software & services industry. Shares are up 10% year to date as of the close of trading on Thursday. ACI Worldwide, Inc. engages in developing, marketing, installing, and supporting software products and services to facilitate electronic payments in the Americas, Europe, the Middle East, Africa, and the Asia Pacific. The company has a P/E ratio of 22.2, above the average computer software & services industry P/E ratio of 21.6 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates ACI Worldwide as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, largely solid financial position with reasonable debt levels by most measures, solid stock price performance, impressive record of earnings per share growth and compelling growth in net income. We feel these strengths outweigh the fact that the company shows weak operating cash flow. You can view the full ACI Worldwide Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are rising on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVUP to 95370 or select from multiple alert options.