Editor's Note: Any reference to TheStreet Ratings and its underlying recommendation does not reflect the opinion of TheStreet, Inc. or any of its contributors including Jim Cramer or Stephanie Link. All three major indices are trading up today with the Dow Jones Industrial Average ( ^DJI) trading up 72 points (0.4%) at 16,112 as of Thursday, Feb. 20, 2014, 11:55 AM ET. The NYSE advances/declines ratio sits at 1,810 issues advancing vs. 1,095 declining with 165 unchanged. The Industrial industry currently sits up 0.7% versus the S&P 500, which is up 0.3%. On the negative front, top decliners within the industry include Nidec Corporation ( NJ), down 0.8%, and ABB ( ABB), down 0.6%. Top gainers within the industry include 3D Systems Corporation ( DDD), up 4.4%, Xylem ( XYL), up 2.3%, Ametek ( AME), up 1.2%, Dover Corporation ( DOV), up 1.2% and Ingersoll-Rand ( IR), up 1.1%. TheStreet would like to highlight 3 stocks pushing the industry lower today: 3. Polypore International ( PPO) is one of the companies pushing the Industrial industry lower today. As of noon trading, Polypore International is down $3.08 (-9.3%) to $29.87 on heavy volume. Thus far, 1.8 million shares of Polypore International exchanged hands as compared to its average daily volume of 435,400 shares. The stock has ranged in price between $29.73-$30.69 after having opened the day at $30.10 as compared to the previous trading day's close of $32.95. 7-Apr-2005 Amos Lynn However, our business is focused on membranes and modules containing membranes for a wide variety of filtrations applications. We have generally steered clear of systems businesses, macro filtration markets, pumps or non-membrane based methods of filtration. Polypore International has a market cap of $1.5 billion and is part of the industrial goods sector. Shares are down 15.3% year-to-date as of the close of trading on Wednesday. Currently there are 2 analysts that rate Polypore International a buy, no analysts rate it a sell, and 5 rate it a hold. TheStreet Ratings rates Polypore International as a hold. The company's strengths can be seen in multiple areas, such as its good cash flow from operations and expanding profit margins. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself, feeble growth in the company's earnings per share and deteriorating net income. Get the full Polypore International Ratings Report now. STOCKS TO BUY: TheStreet Quant Ratings has identified a handful of stocks that can potentially TRIPLE in the next 12 months. Learn more.