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Tag Archives: S&P 100

Sep 23, 2025

Beyond Mega Caps: Exploring the S&P 500 Ex-S&P 100 Select Index

Introduction The representation of S&P 100® companies in the S&P 500® has grown over the past two decades: the blue-chip subset of The 500™ accounted for 70% of the large-cap U.S. equity benchmark’s weight at the end of June 2025, up from 45% at the end of 1998. However, market participants may find it beneficial…

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Mar 21, 2018

The Impact of Size on Active Management Performance in 2017: Part 1

U.S. equity markets finished 2017 on a strong note, with the S&P 500® returning 21.83% during the one-year period ending on Dec. 31, 2017. This was followed by the S&P MidCap 400® and S&P SmallCap 600® returning 16.24% and 13.23%, respectively. Despite market-cap weighting being a dominant form of indexing, equal weighting has outperformed on…

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