As of May 26, 2026, two stocks in the materials sector could be flashing a real warning to investors who value momentum as a key criteria in their trading decisions.Here's the latest list of major overbought players in this sector.SunCoke Energy Inc (NYSE:SXC)Newmarket Corp (NYSE:NEU)

On April 22, NewMarket posted a decline in first-quarter earnings and sales results. The company's stock gained around 8% over the past five days and has a 52-week high of $875.97.

RSI Value: 77

NEU Price Action: Shares of Newmarket gained 2.4% to close at $737.72 on Friday.