By George Glover

Three stocks set to join the S&P 500 were rallying Monday, even as the broader market slumped after the Iran war drove oil prices past $100 a barrel.

Data-center equipment maker Vertiv Holdings and optical networking company Lumentum Holdings both rose 3% ahead of the opening bell. Satellite communications infrastructure provider EchoStar added 2.1%, while Lumentum's peer Coherent slipped 0.5%.

S&P Dow Jones Indices said after Friday's close that the four stocks would join the S&P 500 before trading begins on March 23, as part of the index's quarterly rebalance.

Quarterly rebalancings tend to trigger buying and selling by funds that track the benchmarks, which can drive short-term moves in the affected stocks.

Online dating app developer Match, health insurance provider Molina Healthcare, food processing company Lamb Weston, and HR software provider Paycom Software are all leaving the S&P 500 and moving down to smaller indexes as part of the rebalancing.

Match dropped 2.5%, Molina slid 0.9%, Lamb Weston climbed 0.1%, and Paycom fell 2.1% in Monday's premarket.

Futures tracking the S&P 500 were 1.1% lower as investors worried that the war in the Middle East would lead to a drawn-out disruption of energy supplies.

Write to George Glover at george.glover@dowjones.com

This content was created by Barron's, which is operated by Dow Jones & Co. Barron's is published independently from Dow Jones Newswires and The Wall Street Journal.

(END) Dow Jones Newswires

March 09, 2026 07:34 ET (11:34 GMT)

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