All three major indices are trading up today with the Dow Jones Industrial Average ( ^DJI) trading up 32 points (0.2%) at 17,861 as of Friday, May 27, 2016, 12:55 PM ET. The NYSE advances/declines ratio sits at 1,933 issues advancing vs. 985 declining with 172 unchanged.

The Basic Materials sector currently sits down 0.5% versus the S&P 500, which is up 0.3%. On the negative front, top decliners within the sector include CF Industries Holdings ( CF), down 3.0%, ArcelorMittal ( MT), down 2.8%, Ultrapar Participacoes ( UGP), down 1.9%, Statoil ASA ( STO), down 1.8% and Anadarko Petroleum ( APC), down 1.6%. Top gainers within the sector include Energy Transfer Equity ( ETE), up 4.7%, Energy Transfer Partners ( ETP), up 2.0%, Sherwin-Williams ( SHW), up 1.3%, Baker Hughes ( BHI), up 0.9% and TransCanada ( TRP), up 0.7%.

TheStreet would like to highlight 3 stocks pushing the sector lower today:

3. Royal Dutch Shell ( RDS.A) is one of the companies pushing the Basic Materials sector lower today. As of noon trading, Royal Dutch Shell is down $0.36 (-0.7%) to $49.49 on light volume. Thus far, 1.2 million shares of Royal Dutch Shell exchanged hands as compared to its average daily volume of 4.9 million shares. The stock has ranged in price between $49.25-$49.69 after having opened the day at $49.66 as compared to the previous trading day's close of $49.85.

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Royal Dutch Shell plc operates as an independent oil and gas company worldwide. It operates through Upstream and Downstream segments. The company explores for and extracts crude oil, natural gas, and natural gas liquids. Royal Dutch Shell has a market cap of $201.9 billion and is part of the energy industry. Shares are up 8.9% year-to-date as of the close of trading on Thursday.

TheStreet Ratings rates Royal Dutch Shell as a hold. Among the primary strengths of the company is its solid financial position based on a variety of debt and liquidity measures that we have evaluated. At the same time, however, we also find weaknesses including deteriorating net income, poor profit margins and weak operating cash flow. Get the full Royal Dutch Shell Ratings Report now.

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2. As of noon trading, Continental Resources ( CLR) is down $0.64 (-1.5%) to $41.41 on light volume. Thus far, 1.4 million shares of Continental Resources exchanged hands as compared to its average daily volume of 6.5 million shares. The stock has ranged in price between $41.03-$41.95 after having opened the day at $41.72 as compared to the previous trading day's close of $42.05.

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Continental Resources, Inc. explores for, develops, and produces crude oil and natural gas properties in the north, south, and east regions of the United States. Continental Resources has a market cap of $15.6 billion and is part of the energy industry. Shares are up 83.0% year-to-date as of the close of trading on Thursday. Currently there are 12 analysts that rate Continental Resources a buy, 1 analyst rates it a sell, and 8 rate it a hold.

TheStreet Ratings rates Continental Resources as a sell. The company's weaknesses can be seen in multiple areas, such as its feeble growth in its earnings per share, generally high debt management risk, disappointing return on equity, weak operating cash flow and generally disappointing historical performance in the stock itself. Get the full Continental Resources Ratings Report now.

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1. As of noon trading, Marathon Oil ( MRO) is down $0.36 (-2.7%) to $12.82 on light volume. Thus far, 8.0 million shares of Marathon Oil exchanged hands as compared to its average daily volume of 32.4 million shares. The stock has ranged in price between $12.77-$13.10 after having opened the day at $13.08 as compared to the previous trading day's close of $13.17.

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Marathon Oil Corporation operates as an energy company. It operates through three segments: North America E&P, International E&P, and Oil Sands Mining. Marathon Oil has a market cap of $11.5 billion and is part of the energy industry. Shares are up 4.6% year-to-date as of the close of trading on Thursday. Currently there are 8 analysts that rate Marathon Oil a buy, 1 analyst rates it a sell, and 7 rate it a hold.

TheStreet Ratings rates Marathon Oil as a sell. The company's weaknesses can be seen in multiple areas, such as its poor profit margins, weak operating cash flow, generally disappointing historical performance in the stock itself, disappointing return on equity and feeble growth in its earnings per share. Get the full Marathon Oil Ratings Report now.

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If you are interested in one of these 3 stocks, ETFs may be of interest. Investors who are bullish on the basic materials sector could consider Materials Select Sector SPDR ( XLB) while those bearish on the basic materials sector could consider ProShares Short Basic Materials Fd ( SBM).