NEW YORK (TheStreet) -- Polypore International (PPO)  stock is gaining in post-market trading despite missing first-quarter earnings and revenue estimates. 

After the bell, shares added 8% to $37.50.

Over its March-ending quarter, the company earned net income of 30 cents a share, 2 cents higher than analysts surveyed by Thomson Reuters expected. Revenue of $161 million climbed 10.3% year over year, but missed estimates of $161.72 million. 

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TheStreet Recommends

TheStreet Ratings team rates POLYPORE INTERNATIONAL INC as a Hold with a ratings score of C. TheStreet Ratings Team has this to say about their recommendation:

"We rate POLYPORE INTERNATIONAL INC (PPO) a HOLD. The primary factors that have impacted our rating are mixed -- some indicating strength, some showing weaknesses, with little evidence to justify the expectation of either a positive or negative performance for this stock relative to most other stocks. The company's strengths can be seen in multiple areas, such as its revenue growth, expanding profit margins and good cash flow from operations. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself, disappointing return on equity and generally higher debt management risk."

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