Marsh & McLennan Plunges 1.54% to 232nd in Trading Volume Amid Margin Pressures and Regulatory Scrutiny

Marsh & McLennan (MMC) closed on Sept. 10, 2025, , , ranking 232nd in market activity. The drop followed a mixed earnings report highlighting margin pressures in its risk and insurance services segments, . Analysts noted the stock’s underperformance against peers amid concerns over regulatory scrutiny in its core U.S. markets.

Recent market commentary focused on Marsh’s strategic pivot toward digital underwriting tools, . A separate report highlighted client attrition in the Asia-Pacific region, . These factors, combined with a broader selloff in property-and-casualty insurers, weighed on investor sentiment.

To build and run this back-test, two daily data series were required for the U.S. listed-equity universe from Jan. 1, 2022, . The methodology assumes equal-weight portfolios with a buy-and-sell strategy at daily close. Adjustments to the universe or trading conventions would require prior confirmation before data retrieval and execution.