S&P 400 rejig: HTZ, PENN to exit index; Illumina moves down from S&P 500

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S&P Dow Jones Indices is set to adjust its mid-cap S&P 400 indices as part of its quarterly rebalancing.

Introduced in 1991, the S&P MidCap 400 index measures the performance of U.S. mid-sized companies, reflecting the distinctive risk and return characteristics of this