NEW YORK ( TheStreet) -- Williams Partners (NYSE: WPZ) is trading at unusually high volume Friday with 1.1 million shares changing hands. It is currently at 4.1 times its average daily volume and trading up $1.32 (+2.2%) at $60.53 as of 4:05 p.m. ET. Williams has a market cap of $18.83 billion and is part of the basic materials sector and chemicals industry. Shares are down 1.3% year to date as of the close of trading on Thursday. Williams Partners L.P. focuses on natural gas transportation, gathering, treating and processing, storage, natural gas liquid fractionation, and oil transportation activities in the United States. The company operates in two segments, Gas Pipeline, and Midstream Gas and Liquids. The company has a P/E ratio of 16, above the average chemicals industry P/E ratio of 15.3 and below the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Williams as a buy. The company's strengths can be seen in multiple areas, such as its compelling growth in net income, robust revenue growth, expanding profit margins, solid stock price performance and impressive record of earnings per share growth. Although the company may harbor some minor weaknesses, we feel they are unlikely to have a significant impact on results. You can view the full Williams Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are rising on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVUP to 95370 or select from multiple alert options.