All three major indices are trading up today with the Dow Jones Industrial Average ( ^DJI) trading up 37 points (0.2%) at 17,877 as of Wednesday, July 6, 2016, 12:55 PM ET. The NYSE advances/declines ratio sits at 1,655 issues advancing vs. 1,273 declining with 140 unchanged.

The Basic Materials sector currently sits up 0.5% versus the S&P 500, which is up 0.3%. On the negative front, top decliners within the sector include Marathon Petroleum ( MPC), down 5.9%, Valero Energy ( VLO), down 3.3%, Phillips 66 ( PSX), down 2.8%, Enbridge Energy Partners ( EEP), down 2.4% and MPLX ( MPLX), down 2.0%. Top gainers within the sector include Energy Transfer Equity ( ETE), up 4.8%, Barrick Gold ( ABX), up 3.4%, Randgold Resources ( GOLD), up 2.6%, Nucor ( NUE), up 2.6% and Anadarko Petroleum ( APC), up 2.2%.

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

3. Tesoro ( TSO) is one of the companies pushing the Basic Materials sector lower today. As of noon trading, Tesoro is down $3.85 (-5.1%) to $71.09 on heavy volume. Thus far, 2.4 million shares of Tesoro exchanged hands as compared to its average daily volume of 1.9 million shares. The stock has ranged in price between $69.49-$74.42 after having opened the day at $74.38 as compared to the previous trading day's close of $74.94.

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Tesoro Corporation, through its subsidiaries, operates as an independent petroleum refining, logistics, and marketing company in the United States. Tesoro has a market cap of $9.3 billion and is part of the energy industry. Shares are down 28.9% year-to-date as of the close of trading on Tuesday. Currently there are 6 analysts that rate Tesoro a buy, no analysts rate it a sell, and 7 rate it a hold.

TheStreet Ratings rates Tesoro as a buy. The company's strengths can be seen in multiple areas, such as its notable return on equity, reasonable valuation levels and good cash flow from operations. We feel its strengths outweigh the fact that the company shows low profit margins. Get the full Tesoro Ratings Report now.

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2. As of noon trading, National Oilwell Varco ( NOV) is down $0.89 (-2.8%) to $31.25 on average volume. Thus far, 2.8 million shares of National Oilwell Varco exchanged hands as compared to its average daily volume of 5.8 million shares. The stock has ranged in price between $30.67-$31.82 after having opened the day at $31.75 as compared to the previous trading day's close of $32.14.

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National Oilwell Varco, Inc. designs, manufactures, and sells equipment and components used in oil and gas drilling, completion, and production operations; and provides oilfield services to the upstream oil and gas industry worldwide. National Oilwell Varco has a market cap of $13.0 billion and is part of the energy industry. Shares are down 4.0% year-to-date as of the close of trading on Tuesday. Currently there are 6 analysts that rate National Oilwell Varco a buy, 4 analysts rate it a sell, and 17 rate it a hold.

TheStreet Ratings rates National Oilwell Varco as a sell. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, disappointing return on equity, poor profit margins, generally disappointing historical performance in the stock itself and feeble growth in its earnings per share. Get the full National Oilwell Varco Ratings Report now.

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1. As of noon trading, E.I. du Pont de Nemours ( DD) is down $0.88 (-1.4%) to $62.08 on average volume. Thus far, 1.6 million shares of E.I. du Pont de Nemours exchanged hands as compared to its average daily volume of 3.1 million shares. The stock has ranged in price between $61.12-$62.56 after having opened the day at $62.56 as compared to the previous trading day's close of $62.96.

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E. I. du Pont de Nemours and Company operates as a science and technology based company. E.I. du Pont de Nemours has a market cap of $56.2 billion and is part of the chemicals industry. Shares are down 5.5% year-to-date as of the close of trading on Tuesday. Currently there are 4 analysts that rate E.I. du Pont de Nemours a buy, 1 analyst rates it a sell, and 6 rate it a hold.

TheStreet Ratings rates E.I. du Pont de Nemours as a buy. The company's strengths can be seen in multiple areas, such as its increase in net income, largely solid financial position with reasonable debt levels by most measures, good cash flow from operations, solid stock price performance and growth in earnings per share. We feel its strengths outweigh the fact that the company has had somewhat disappointing return on equity. Get the full E.I. du Pont de Nemours 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).