Editor's Note: TheStreet ratings do not represent the views of TheStreet's staff or its contributors. Ratings are established by computer based on metrics for performance (which includes growth, stock performance, efficiency and valuation) and risk (volatility and solvency). Companies with poor cash flow or high debt levels tend to earn lower ratings in our model All three major indices are trading up today with the Dow Jones Industrial Average ( ^DJI) trading up 12 points (0.1%) at 15,069 as of Wednesday, May 8, 2013, 12:55 PM ET. The NYSE advances/declines ratio sits at 1,670 issues advancing vs. 1,254 declining with 121 unchanged. The Chemicals industry currently sits down 0.13 versus the S&P 500, which is up 0.2%. TheStreet Ratings group would like to highlight 3 stocks pushing the industry lower today: 3. Williams Partners ( WPZ) is one of the companies pushing the Chemicals industry lower today. As of noon trading, Williams Partners is down $2.00 (-3.9%) to $49.40 on heavy volume Thus far, 1.6 million shares of Williams Partners exchanged hands as compared to its average daily volume of 1.2 million shares. The stock has ranged in price between $49.26-$50.46 after having opened the day at $50.39 as compared to the previous trading day's close of $51.40. Williams Partners L.P., an energy infrastructure company, focuses on connecting North America's hydrocarbon resource plays to growing markets for natural gas and natural gas liquids (NGL). It operates in two segments, Gas Pipeline and Midstream Gas & Liquids. Williams Partners has a market cap of $20.7 billion and is part of the basic materials sector. The company has a P/E ratio of 27.5, above the S&P 500 P/E ratio of 17.7. Shares are up 5.6% year to date as of the close of trading on Tuesday. TheStreet Ratings rates Williams Partners as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, good cash flow from operations and expanding profit margins. We feel these strengths outweigh the fact that the company has had lackluster performance in the stock itself. Get the full Williams Partners Ratings Report now. Exclusive Offer: Jim Cramer's 'go-to' small/mid-cap guru Bryan Ashenberg only buys stocks he thinks could return 50-100%. See his top picks for 14-days FREE.