All three major indices are trading down today with the Dow Jones Industrial Average ( ^DJI) trading down 28 points (-0.2%) at 16,426 as of Thursday, Feb. 18, 2016, 11:55 AM ET. The NYSE advances/declines ratio sits at 1,380 issues advancing vs. 1,516 declining with 148 unchanged.

The Basic Materials sector currently sits down 1.1% versus the S&P 500, which is down 0.3%. On the negative front, top decliners within the sector include Gold Fields ( GFI), down 10.4%, Newfield Exploration ( NFX), down 7.8%, Anadarko Petroleum ( APC), down 6.7%, Antero Resources ( AR), down 6.4% and Southern Copper ( SCCO), down 5.5%. Top gainers within the sector include Plains GP Holdings ( PAGP), up 6.9%, CF Industries Holdings ( CF), up 5.2%, Barrick Gold ( ABX), up 5.0%, Western Gas Equity Partners ( WGP), up 2.3% and Enbridge Energy Partners ( EEP), up 3.3%.

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

3. Helmerich & Payne ( HP) is one of the companies pushing the Basic Materials sector lower today. As of noon trading, Helmerich & Payne is down $2.49 (-4.7%) to $50.43 on average volume. Thus far, 1.2 million shares of Helmerich & Payne exchanged hands as compared to its average daily volume of 2.6 million shares. The stock has ranged in price between $50.18-$53.65 after having opened the day at $53.05 as compared to the previous trading day's close of $52.92.

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Helmerich & Payne, Inc. engages in the contract drilling of oil and gas wells. It provides drilling rigs, equipment, personnel, and camps on a contract basis to explore for and develop oil and gas from onshore areas and from fixed platforms, tension-leg platforms, and spars in offshore areas. Helmerich & Payne has a market cap of $5.3 billion and is part of the energy industry. Shares are down 1.2% year-to-date as of the close of trading on Wednesday. Currently there are 6 analysts that rate Helmerich & Payne a buy, 4 analysts rate it a sell, and 12 rate it a hold.

TheStreet Ratings rates Helmerich & Payne as a hold. The company's strengths can be seen in multiple areas, such as its largely solid financial position with reasonable debt levels by most measures and expanding profit margins. However, as a counter to these strengths, we also find weaknesses including feeble growth in the company's earnings per share, disappointing return on equity and weak operating cash flow. Get the full Helmerich & Payne Ratings Report now.

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2. As of noon trading, Royal Dutch Shell ( RDS.B) is down $0.50 (-1.1%) to $45.71 on light volume. Thus far, 1.0 million shares of Royal Dutch Shell exchanged hands as compared to its average daily volume of 3.1 million shares. The stock has ranged in price between $45.60-$46.49 after having opened the day at $46.39 as compared to the previous trading day's close of $46.21.

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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 $144.8 billion and is part of the energy industry. Shares are up 0.4% year-to-date as of the close of trading on Wednesday.

TheStreet Ratings rates Royal Dutch Shell as a hold. The company's strengths can be seen in multiple areas, such as its increase in net income, growth in earnings per share and largely solid financial position with reasonable debt levels by most measures. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself, disappointing return on equity and weak operating cash flow. Get the full Royal Dutch Shell Ratings Report now.

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1. As of noon trading, Marathon Oil ( MRO) is down $0.60 (-8.0%) to $6.82 on heavy volume. Thus far, 27.2 million shares of Marathon Oil exchanged hands as compared to its average daily volume of 19.9 million shares. The stock has ranged in price between $6.70-$7.62 after having opened the day at $7.60 as compared to the previous trading day's close of $7.41.

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Marathon Oil Corporation operates as an energy company. It operates in three segments: North America Exploration and Production, International Exploration and Production, and Oil Sands Mining. Marathon Oil has a market cap of $5.0 billion and is part of the energy industry. Shares are down 41.1% year-to-date as of the close of trading on Wednesday. Currently there are 8 analysts that rate Marathon Oil a buy, 1 analyst rates it a sell, and 6 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 deteriorating net income, disappointing return on equity, weak operating cash flow, generally disappointing historical performance in the stock itself 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).