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 down today with the Dow Jones Industrial Average ( ^DJI) trading down 20 points (-0.2%) at 12,795 as of Monday, Nov. 12, 2012, 11:49 AM ET. The NYSE advances/declines ratio sits at 1,283 issues advancing vs. 1,555 declining with 129 unchanged. The Basic Materials sector currently sits up 0.1% versus the S&P 500, which is down 0.1%. On the negative front, top decliners within the sector include SandRidge Energy ( SD), down 6.7%, NuStar Energy L.P ( NS), down 6.2%, Plains All American Pipeline ( PAA), down 3.5%, Enterprise Products Partners ( EPD), down 2.8% and Randgold Resources ( GOLD), down 1.7%. Top gainers within the sector include Emerald Oil ( EOX), up 298.4%, Titanium Metals Corporation ( TIE), up 42.3%, Kronos Worldwide ( KRO), up 10.6%, Valhi Incorporated ( VHI), up 4.1% and Nexen ( NXY), up 2.0%. TheStreet Ratings group would like to highlight 5 stocks pushing the sector lower today: 5. Yamana Gold ( AUY) is one of the companies pushing the Basic Materials sector lower today. As of noon trading, Yamana Gold is down $0.18 (-0.9%) to $19.95 on light volume Thus far, 1.5 million shares of Yamana Gold exchanged hands as compared to its average daily volume of 5.8 million shares. The stock has ranged in price between $19.80-$20.31 after having opened the day at $20.25 as compared to the previous trading day's close of $20.13. Yamana Gold Inc. engages in the exploration, development, and production of mineral properties, primarily gold. It also explores for copper, molybdenum, zinc, and silver metals. Yamana Gold has a market cap of $15.3 billion and is part of the metals & mining industry. The company has a P/E ratio of 42.5, above the S&P 500 P/E ratio of 17.7. Shares are up 38.8% year to date as of the close of trading on Friday. Currently there are 14 analysts that rate Yamana Gold a buy, no analysts rate it a sell, and 2 rate it a hold. TheStreet Ratings rates Yamana Gold as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, largely solid financial position with reasonable debt levels by most measures, solid stock price performance, good cash flow from operations and expanding profit margins. We feel these strengths outweigh the fact that the company has had somewhat disappointing return on equity. Get the full Yamana Gold Ratings Report now.