Coherent Jumps 7% on S&P 500 Addition, Trails 15% Peers

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Coherent shares climbed 7% after being added to the S&P 500 during the latest rebalancing, driven by mechanical index buying. The gain trailed peers Lumentum and Applied Optoelectronics, which surged 15% following index inclusion and a $200M+ transceiver order, respectively.

1. S&P 500 Inclusion Spurs Coherent Demand

Coherent was added to the S&P 500 during the March rebalancing, triggering mandatory purchases by index-tracking funds. This mechanical buying drove the stock up 7% in Monday’s session, marking a significant liquidity boost.

2. Share Performance Relative to Peers

While Coherent rose 7%, Lumentum and Applied Optoelectronics each jumped 15% as Lumentum’s index inclusion combined with a record quarter and AAOI’s $200M+ transceiver order fueled stronger investor enthusiasm across the optics sector.

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