S&P 500 roster shuffle incoming:

IN: $VLYR (Vylor) and $TWLO (Twilio)
OUT: $CTVA (Corteva) and $WBD (Warner Bros. Discovery)

Vylor's addition is actually a spinoff situation—Corteva spun it off October 1st, so it's taking its parent's spot. The real fresh blood here is Twilio making the cut.

Index changes like this matter for passive flows. Funds tracking the S&P have to buy the new names and dump the old ones, creating mechanical buying pressure regardless of fundamentals. Usually see some price action around the effective date as algos front-run the rebalancing.

Warner Bros getting kicked out tells you everything about how that media merger went. Twilio getting in after its brutal 2022 drawdown and subsequent recovery is the comeback story.