How concentrated is the S&P 500 today?

The S&P 493 is gaining attention as investors look beyond the Magnificent Seven and reassess where growth and diversification may come from in today’s equity markets. With market concentration at historic highs, a handful of mega cap companies have driven much of the S&P 500’s returns, raising questions about what lies beneath the surface.

In this episode of The Bid, host Oscar Pulido speaks with Ibrahim Kanan, Head of the U.S. Core Equity Team within BlackRock’s Fundamental Equities Group, about the growing relevance of the S&P 493 — the broader set of companies outside the largest names. They explore how market concentration has evolved, why a $200 billion company represents only a small fraction of the index, and what that means for portfolio exposure.

The conversation highlights how earnings growth is beginning to broaden beyond mega cap stocks, supported in part by the expanding impact of AI investment across sectors. From industrials and healthcare to consumer and financials, companies are both benefiting from AI infrastructure spending and adopting AI to improve operations. As dispersion across companies increases, the discussion also examines how active investing, differentiation, and stock selection may play a larger role in navigating today’s equity market.

Key moments in this episode:

00:00 Introduction

01:24 How Unprecedented Is 40% market Concentration of Magnificent Seven?

03:35 What the S&P 493 represents

05:28 Best of the Rest Signals

07:21 Earnings Growth and Convergence Explained

08:04 AI CapEx Spreads Beyond Nvidia

10:31 AI as a Competitive Edge

13:14 Where Opportunities Show Up

14:35 Beyond AI and Idiosyncratic Picks

15:44 Diversification Mirage and Active Risk

18:04 Investor Mindset in Volatile Markets

19:56 Wrap Up

Check out this episode with Carrie King on her stock picks for 2026: https://open.spotify.com/episode/69Ndp7lM8wRRccLh7EfyPg

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S&P 493, Magnificent Seven, US equities, stock market trends, AI investing, capital markets, active investing, portfolio diversification

Sources: BlackRock Fundamental Equities with data from FactSet and Bloomberg as of 12/31/25; Yahoo Finance, Stock Prices for NVDA and HAS, US ISM Manufacturing PMI 2026; “Here's the Average Stock Market Return in the Last 15 Years and What Wall Street Expects in 2025”, Yahoo Finance January 2025; “‘Magnificent-7’ Q4 2024 Earnings Review: Growth Holds, but Rotation Awaits” LSEG March 2025

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