Coherent to Join S&P 500 on March 23, Spurs Automatic ETF Buying
Coherent will join the S&P 500 on March 23, 2026, replacing Match Group, Molina Healthcare, Lamb Weston and Paycom in the quarterly rebalance. This inclusion compels S&P 500 index funds managing over $4 trillion to purchase Coherent shares automatically, generating billions in price-insensitive demand.
1. Inclusion Details
Coherent will be officially added to the S&P 500 effective March 23, 2026, as part of the quarterly rebalance that removes Match Group, Molina Healthcare, Lamb Weston and Paycom. The company graduates from the S&P MidCap 400 after meeting eligibility criteria based on market capitalization and trading liquidity.
2. Passive ETF Demand
All ETFs and index funds tracking the S&P 500 must purchase Coherent shares in proportion to its new index weight, tapping into over $4 trillion in passive assets benchmarked to the index. This built-in demand is price-insensitive and can provide a structural support for the stock.
3. MidCap 400 Vacancy
Coherent’s departure creates a vacancy in the S&P MidCap 400, triggering further reshuffling among mid-cap names. The broader rebalancing highlights the growing influence of AI infrastructure companies as they move into larger, more prestigious benchmarks.