NEW YORK ( TheStreet) -- Polypore International (NYSE: PPO) is trading at unusually high volume Wednesday with 4.1 million shares changing hands. It is currently at 4.1 times its average daily volume and trading up $3.93 (+10.3%) at $42.01 as of 10 a.m. ET. Polypore International has a market cap of $2.6 billion and is part of the industrial goods sector and industrial industry. Shares are down 13.4% year to date as of the close of trading on Tuesday. Polypore International, Inc., a technology filtration company, develops, manufactures, and markets microporous membranes used in separation and filtration processes. It operates in two segments, Energy Storage and Separations Media. The company has a P/E ratio of 26.3, below the average industrial industry P/E ratio of 26.9 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Polypore International as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, notable return on equity, expanding profit margins, good cash flow from operations and impressive record of earnings per share growth. We feel these strengths outweigh the fact that the company is trading at a premium valuation based on our review of its current price compared to such things as earnings and book value. You can view the full Polypore International 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.