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Tag Archives: mega caps

Mar 17, 2026

Unicorns at the Gate: How Mega IPOs Could Reshape Global and Thematic Indices

Big unicorns are outside the door waiting to join the public markets party. Recently, it has been reported that SpaceX,1 OpenAI2 and Anthropic3 are preparing for their initial public offering (IPO) in the near future. This has drawn attention not just for the size of these firms but for the impact they would have on…

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Feb 2, 2026

Examining Diversification and Depth in Mega Caps

How are new index approaches to mega caps helping to address concentration concerns and increase sector diversification? S&P DJI’s Hamish Preston and DWS’s David Bianco take a closer look at the S&P 100 Ex-Top 20 Select Index to explore the role of the “next 80” in the global equity opportunity set.   

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Nov 19, 2025

Exploring the Depth of Mega Caps: A Look at the S&P 100 Ex-Top 20 Select Index

What Lies Beneath the Headline Names in the S&P 100? Introducing the S&P 100 Ex-Top 20 Select Index, which measures the performance of companies within the S&P 100, excluding the largest 20 constituents ranked by float-adjusted market capitalization. This blog examines the depth, diversification and shifting leadership that can be obscured by the dominance of…

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Jul 17, 2025

Weighting in the Wings: Equal Weight in a Mega-Cap World

In today’s equity market, mega-cap stocks are not just influential—they have become a driving force shaping overall performance and strategic market dynamics.1 The increasing market dominance of the top 100 constituents, and the narrowing differential in cumulative weights of these names, in both the S&P Total Market Index (TMI)—which tracks the broad U.S. equity market—and…

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Apr 25, 2025

Volatility, Correlation and Dispersion in the S&P 500 Top 20 Select Index

The S&P 500® Top 20 Select Index series launched in August 2024 and is designed to measure the capped market-capitalization-weighted performance of the largest 20 companies, by float market cap, in the S&P 500. Previous blogs introduced the S&P 500 Top 20 Select Indices, covering their construction, objectives and historical performance. This installment examines the…

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Nov 25, 2024

The S&P 500 Top 20 Select Indices: A Deep Dive into Mega-Cap Performance

In the first part of this blog series, we introduced the S&P 500® Top 20 Select Indices, including their construction and relevance to the equity market. Now, let’s delve deeper into the indices’ historical performance and relative performance to other similar indices. Perhaps unsurprisingly, the S&P 500 Top 20 Select Indices all had similar cumulative…

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Nov 25, 2024

Introducing the S&P 500 Top 20 Select Indices

The S&P 500® is widely regarded as the best single gauge of U.S. large-cap equities. Among the 500 companies in the index, the largest names have drawn the most attention due to their outperformance in recent years. To address the increasing interest in mega-cap stocks in the S&P 500, S&P DJI recently launched the S&P…

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Nov 20, 2023

An Elevating Effect on Equal Weight?

The trouncing of smaller caps by mega-cap stocks has been one of the hallmark market themes of this year, with the S&P 500® Top 50 outpacing the S&P SmallCap 600® by 30% YTD.1 As a result of its inherent small-cap bias, the S&P 500 Equal Weight Index (EWI) has suffered accordingly, underperforming the S&P 500…

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Nov 9, 2023

The Magnificent Seven: A Taxing Question

“The Magnificent Seven” term has transcended its cinematic roots to become the collective moniker for a select group of U.S. mega-cap stocks responsible for over 90% of the S&P 500®’s YTD gains to October’s end. Their stellar performance has, naturally, elevated their valuations. It has also increased their already-hefty collective weight in the equity benchmark….

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Sep 13, 2021

Headwinds on the Active Horizon

Active managers’ performance was disappointing in 2020, despite the market’s heightened volatility. As the market continues to march upward in 2021, it’s natural to wonder if current conditions are favorable for stock pickers.  We expect active managers’ difficulties to persist. We can think of volatility in terms of its components: dispersion and correlation. Active managers…

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