All three major indices are trading down today with the Dow Jones Industrial Average ( ^DJI) trading down 16 points (-0.1%) at 17,529 as of Tuesday, Aug. 18, 2015, 12:55 PM ET. The NYSE advances/declines ratio sits at 984 issues advancing vs. 2,001 declining with 166 unchanged.

The Materials & Construction industry currently sits up 0.3% versus the S&P 500, which is down 0.2%. On the negative front, top decliners within the industry include Abengoa ( ABGB), down 5.9%, and MasTec ( MTZ), down 4.4%. Top gainers within the industry include Toll Brothers ( TOL), up 2.5%, Fastenal ( FAST), up 0.8%, Stericycle ( SRCL), up 0.8% and Republic Services ( RSG), up 0.6%.

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

3. MDU Resources Group ( MDU) is one of the companies pushing the Materials & Construction industry lower today. As of noon trading, MDU Resources Group is down $0.26 (-1.4%) to $18.64 on light volume. Thus far, 200,422 shares of MDU Resources Group exchanged hands as compared to its average daily volume of 1.2 million shares. The stock has ranged in price between $18.63-$18.89 after having opened the day at $18.79 as compared to the previous trading day's close of $18.90.

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MDU Resources Group, Inc. operates as a diversified natural resource company in the United States. The company's Electric segment generates, transmits, and distributes electricity in Montana, North Dakota, South Dakota, and Wyoming. MDU Resources Group has a market cap of $3.6 billion and is part of the industrial goods sector. Shares are down 19.6% year-to-date as of the close of trading on Monday. Currently there are 2 analysts that rate MDU Resources Group a buy, 1 analyst rates it a sell, and 5 rate it a hold.

TheStreet Ratings rates MDU Resources Group as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth, reasonable valuation levels and good cash flow from operations. However, as a counter to these strengths, we also find weaknesses including feeble growth in the company's earnings per share, deteriorating net income and poor profit margins. Get the full MDU Resources Group Ratings Report now.

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2. As of noon trading, Fluor ( FLR) is down $0.72 (-1.5%) to $47.51 on light volume. Thus far, 424,692 shares of Fluor exchanged hands as compared to its average daily volume of 1.4 million shares. The stock has ranged in price between $47.48-$48.20 after having opened the day at $48.05 as compared to the previous trading day's close of $48.23.

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Fluor Corporation, through its subsidiaries, provides engineering, procurement, construction, fabrication and modularization, commissioning and maintenance, and project management services worldwide. Fluor has a market cap of $7.0 billion and is part of the industrial goods sector. Shares are down 20.4% year-to-date as of the close of trading on Monday. Currently there are 11 analysts that rate Fluor a buy, 1 analyst rates it a sell, and 6 rate it a hold.

TheStreet Ratings rates Fluor as a hold. 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 and notable return on equity. However, as a counter to these strengths, we also find weaknesses including weak operating cash flow, poor profit margins and a generally disappointing performance in the stock itself. Get the full Fluor Ratings Report now.

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1. As of noon trading, Chicago Bridge & Iron Company ( CBI) is down $0.80 (-1.6%) to $48.58 on average volume. Thus far, 639,802 shares of Chicago Bridge & Iron Company exchanged hands as compared to its average daily volume of 1.7 million shares. The stock has ranged in price between $48.29-$49.24 after having opened the day at $49.00 as compared to the previous trading day's close of $49.38.

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Chicago Bridge & Iron Company N.V. provides conceptual design, technology, engineering, procurement, fabrication, modularization, construction, commissioning, maintenance, program management, and environmental services worldwide. Chicago Bridge & Iron Company has a market cap of $5.5 billion and is part of the industrial goods sector. Shares are up 17.6% year-to-date as of the close of trading on Monday. Currently there are 8 analysts that rate Chicago Bridge & Iron Company a buy, 1 analyst rates it a sell, and 5 rate it a hold.

TheStreet Ratings rates Chicago Bridge & Iron Company as a buy. The company's strengths can be seen in multiple areas, such as its growth in earnings per share, increase in net income, good cash flow from operations, attractive valuation levels and notable return on equity. We feel its strengths outweigh the fact that the company has had lackluster performance in the stock itself. Get the full Chicago Bridge & Iron Company 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 materials & construction industry could consider SPDR S&P Homebuilders ETF ( XHB) while those bearish on the materials & construction industry could consider ProShares Short Basic Materials Fd ( SBM).