Tutor Perini, V2X Shares Climb on S&P SmallCap 600 Inclusion

Shares of Tutor Perini Corp. (NYSE:TPC) and V2X Inc. (NYSE:VVX) gained in after-hours trading Monday following an announcement from S&P Dow Jones Indices that both companies will be added to the S&P SmallCap 600 index. Tutor Perini's stock climbed 7.4%, while V2X shares rose 3.9% on the news.

Index Reshuffle Details

S&P Dow Jones Indices detailed the upcoming changes, which are part of a broader index rebalancing driven by promotions and corporate acquisitions. The adjustments will occur prior to the opening of trading on their respective effective dates.

• Tutor Perini (TPC) will replace Krystal Biotech Inc. (NASDAQ:KRYS) effective July 24.
• V2X Inc. (VVX) will replace Avanos Medical Inc. (NYSE:AVNS) effective July 27.

These changes are prompted by other corporate actions. Krystal Biotech is being promoted to the S&P MidCap 400, while Avanos Medical is being acquired by American Industrial Partners in a transaction expected to close soon.

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Market Impact and Context

Inclusion in a major index like the S&P SmallCap 600 typically provides a positive catalyst for a company's stock. The move forces passive investment funds and exchange-traded funds (ETFs) that track the index to purchase shares of the newly added companies to align their portfolios with the benchmark's new composition.

This mandatory buying pressure often leads to a short-term increase in share price and trading volume. The reshuffle also involves Krystal Biotech replacing Taylor Morrison Home Corp. (NYSE:TMHC) in the S&P MidCap 400. Taylor Morrison is being removed due to its pending acquisition by Berkshire Hathaway Inc. (NYSE:BRK-A), which is expected to be finalized around July 24.