NEW YORK (

TheStreet

) -- Shares of

Polypore International

(NYSE:

PPO

) were gapping up Thursday morning with an open price 10.4% higher than Wednesday's closing price. The stock closed at $49.53 Wednesday and opened today's trading at $54.68.

The average volume for Polypore International has been 562,000 shares per day over the past 30 days. Polypore International has a market cap of $2.3 billion and is part of the

industrial goods

sector and

industrial

industry. Shares are up 21.6% year to date as of the close of trading on Wednesday.

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.

TheStreet Ratings rates Polypore International as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth, solid stock price performance and increase in net income. However, as a counter to these strengths, we also find weaknesses including disappointing return on equity and generally poor debt management. You can view the full

Polypore International Ratings Report

.

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