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. One out of the three major indices are trading up today with the Dow Jones Industrial Average ( ^DJI) trading down 0 points (0.0%) at 15,915 as of Wednesday, Dec. 4, 2013, 11:45 AM ET. The NYSE advances/declines ratio sits at 1,252 issues advancing vs. 1,627 declining with 137 unchanged. The Basic Materials sector currently is unchanged today versus the S&P 500, which is unchanged. On the negative front, top decliners within the sector include El Paso Pipeline Partners ( EPB), down 8.9%, Kinder Morgan ( KMI), down 5.8%, Access Midstream Partners ( ACMP), down 3.3%, Kinder Morgan Energy Partners ( KMP), down 2.0% and Marathon Petroleum ( MPC), down 1.7%. Top gainers within the sector include Linn Energy ( LINE), up 4.4%, Continental Resources ( CLR), up 2.0%, Marathon Oil ( MRO), up 1.4%, Pioneer Natural Resources Company ( PXD), up 1.5% and Hess ( HES), up 1.4%. TheStreet would like to highlight 5 stocks pushing the sector lower today: 5. Plains All American Pipeline ( PAA) is one of the companies pushing the Basic Materials sector lower today. As of noon trading, Plains All American Pipeline is down $0.92 (-1.8%) to $50.04 on light volume. Thus far, 379,341 shares of Plains All American Pipeline exchanged hands as compared to its average daily volume of 1.1 million shares. The stock has ranged in price between $50.01-$50.89 after having opened the day at $50.70 as compared to the previous trading day's close of $50.96. Plains All American Pipeline, L.P., through its subsidiaries, engages in the transportation, storage, terminalling, and marketing of crude oil and refined products in the United States and Canada. The company operates in three segments: Transportation, Facilities, and Supply and Logistics. Plains All American Pipeline has a market cap of $17.6 billion and is part of the energy industry. The company has a P/E ratio of 17.6, below the S&P 500 P/E ratio of 17.7. Shares are up 12.6% year to date as of the close of trading on Tuesday. Currently there are 15 analysts that rate Plains All American Pipeline a buy, no analysts rate it a sell, and 2 rate it a hold. TheStreet Ratings rates Plains All American Pipeline as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, compelling growth in net income, reasonable valuation levels, notable return on equity and increase in stock price during the past year. We feel these strengths outweigh the fact that the company has had generally high debt management risk by most measures that we evaluated. Get the full Plains All American Pipeline 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.