Lumentum Joins the S&P 500 Soon: Buy the Dip Before the Index Funds Have To?

With Lumentum’s (NASDAQ: LITE) inclusion in S&P 500 effective March 23, 2026, passive index funds face a date-certain obligation to buy shares regardless of valuation. The question is how the mechanical buying pressure may affect price action around the inclusion date. Lumentum currently trades around $672, well off its 52-week high of $783.80. The stock ... Lumentum Joins the S&P 500 Soon: Buy the Dip Before the Index Funds Have To?