As of July 6, 2026, three stocks in the materials sector could be flashing a real warning to investors who value momentum as a key criteria in their trading decisions.

The RSI is a momentum indicator, which compares a stock’s strength on days when prices go up to its strength on days when prices go down. When compared to a stock’s price action, it can give traders a better sense of how a stock may perform in the short term. An asset is typically considered overbought when the RSI is above 70, according to Benzinga Pro.

Here’s the latest list of major overbought players in this sector.

Sonoco Products Co (NYSE:SON)

  • On June 8, Sonoco announced plans to increase prices for all converted paperboard products by 7%, effective with shipments on and after July 8. Taylor Lane, Vice President and General Manager, Industrial Paper Packaging, North America, said, “This necessary increase is driven by several factors, including robust demand across our markets and strong utilization in our paper mill network. Additionally, elevated inflationary pressures have significantly increased our operating costs. We remain committed to delivering reliable supply and high-quality products, and this increase helps ensure we can continue to support our customers’ business effectively.” The company’s stock gained around 21% over the past month and has a 52-week high of $58.44.
  • RSI Value: 78.4                                
  • SON Price Action: Shares of Sonoco gained 2.3% to close at $57.42 on Thursday.
  • Edge Stock Ratings: 91.92 Momentum score with Value at 93.51.

Ball Corp (NYSE:BALL)

  • On May 18, JP Morgan analyst Jeffrey Zekauskas upgraded Ball from Neutral to Overweight and maintained the price target of $60. The company’s stock gained around 20% over the past month and has a 52-week high of $68.29.
  • RSI Value: 77.8
  • BALL Price Action: Shares of Ball gained 2.7% to close at $63.39 on Thursday.

Crown Holdings Inc (NYSE:CCK)

  • On May 18, JP Morgan analyst Jeffrey Zekauskas upgraded Crown Holdings from Neutral to Overweight and maintained the price target of $107. The company’s stock gained around 22% over the past five days and has a 52-week high of $116.62.
  • RSI Value: 80.5
  • CCK Price Action: Shares of Crown Holdings rose 1.7% to close at $113.29 on Thursday.

Learn more about BZ Edge Rankings—click to see scores for other stocks in the sector and see how they compare.

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