The stock reached $73.63 during afternoon trading, providing a modest recovery for a security that has struggled with a 7.7% decline since the beginning of the year. S&P Dow Jones Indices confirmed the transition, noting that the replacement becomes official at the start of the Wednesday session.

Arcosa’s departure from the index follows the finalization of its acquisition by CRH, a deal that officially closed last Friday. This index inclusion typically forces institutional funds tracking the SmallCap 600 to purchase shares, often creating temporary upward pressure on a company's market valuation.