The post Coherent, Teradyne, and Ciena Are the S&P 500’s 3 Biggest Decliners on Tuesday appeared first on 24/7 Wall St.. Shares of three AI infrastructure heavyweights are leading the S&P 500 lower into the final hour of Tuesday’s session. Coherent (NYSE:COHR) is off 11%, Ciena (NYSE:CIEN) is down 10%, and Teradyne (NASDAQ:TER) is lower by 10%. All three are the day’s biggest S&P 500 decliners. Risk Rotation Out of AI Hardware Today’s price acti…