Diversification, the Magnificent 7,
and the "Unmagnificent" 493

If you've followed the stock market at all in the past few years, you've probably heard the term "Magnificent 7." It refers to seven of the largest, most influential technology companies in the world — and for a while, they were responsible for an outsized share of the entire stock market's gains.

These seven companies became such a dominant force in major indexes that analysts started referring to everyone else in the S&P 500 — the other 493 companies — as the "S&P 493" or, with a bit of wit, the "unmagnificent 493." The joke captured something real: for a few years, it genuinely felt like seven stocks were carrying the entire market on their backs.

How dominant were they, really?

That last row is the interesting part. For the first time since 2022, the Magnificent 7 actually lagged the rest of the market in early 2026 — down while the broader S&P 493 was up. Only two of the seven (Nvidia and Alphabet) had actually outperformed the overall S&P 500 in 2025; the other five — Amazon, Apple, Meta, Microsoft, and Tesla — fell short of the index's return that year.

Why this matters for diversification

Here's the lesson underneath the headline-grabbing nickname: betting heavily on a small number of stocks — even great, famous, dominant companies — means your returns are entirely tied to their specific fortunes. When the Magnificent 7 were soaring, anyone overweight in those names looked brilliant. When they cooled off in early 2026, the same concentration became a liability.

Owning a broad index — something that includes both the Magnificent 7 and the other 493 companies — means you don't have to correctly predict which group will outperform in any given year. You get exposure to whichever part of the market is actually working, automatically, without having to guess in advance.

The concentration risk hiding inside index funds

Here's a wrinkle worth knowing: even an S&P 500 index fund isn't as diversified as it sounds, because the index is weighted by company size. As of recent data, the 10 largest stocks in the S&P 500 make up close to 40% of the entire index's value — up from about 19% in 2010. That means even "buying the whole market" through a standard S&P 500 ETF gives you a meaningfully concentrated bet on a handful of giant companies, the Magnificent 7 prominent among them.

This isn't a reason to avoid S&P 500 index funds — they're still one of the most reliable, low-cost ways to invest broadly. It's just useful to know that "diversified" is a spectrum, not a binary, and that even broad-market funds carry more concentration than their name implies.

What this means for your own portfolio

• You don't need to predict which group wins. A broad ETF gives you both the Mag 7 and the S&P 493 automatically, in proportion to their actual size in the market.
• Valuations matter, not just popularity. The Magnificent 7 have traded at notably higher price-to-earnings multiples than the rest of the index — meaning investors are paying more per dollar of those companies' earnings, which raises the bar for continued outperformance.
• "Boring" can be a feature, not a flaw. The S&P 493's quieter, steadier performance in early 2026 is a reminder that companies outside the headlines can still deliver solid, sometimes superior, returns.

Connecting back to "invest in what you know"

In our earlier article, we talked about Warren Buffett's advice to invest in businesses you understand. Diversification and that advice work well together: you can hold a broad-market ETF as your foundation — capturing both the famous names and the quieter 493 — while still choosing to add a smaller, individual stock position in a company you genuinely understand and believe in. Neither approach has to be all-or-nothing.