The S&P 500 is a household name in investing, widely regarded as the gold standard for measuring U.S. large-cap stock performance. But in recent years, a lesser-known term has gained traction among market watchers: the S&P 493. This informal index offers a critical lens into the broader market, stripping away the outsized influence of a handful of mega-cap tech stocks to reveal how the majority of large-cap companies are faring. For investors seeking a more nuanced view of market health beyond the headline S&P 500 numbers, the S&P 493 is an indispensable tool.
What Is the S&P 493?
The S&P 493 is not an official index from S&P Dow Jones Indices, but a widely adopted concept referring to the S&P 500 minus its seven largest constituent stocks—Apple, Microsoft, Amazon, Alphabet, Meta Platforms, Tesla, and Nvidia. These seven companies, often called the “Magnificent Seven,” have grown to dominate the S&P 500 in terms of market capitalization and performance. By excluding them, the S&P 493 provides a snapshot of the remaining 493 stocks, which represent a more diversified cross-section of the U.S. economy, from healthcare and industrials to consumer staples and financials.
Key Differences Between the S&P 493 and the S&P 500
Understanding how the S&P 493 differs from the S&P 500 is essential for leveraging its insights.
First, composition: The S&P 500 includes all 500 large-cap U.S. stocks, but its weightings are market-capitalization-based—meaning the largest companies have the most impact on its performance. The S&P 493 removes these top seven, leveling the playing field to highlight the broader market.
Second, sector weightings: The S&P 500’s tech sector weighting is inflated by the Magnificent Seven, while the S&P 493 shifts this balance. Sectors like healthcare, industrials, and consumer staples make up a larger share of the S&P 493, reflecting the true diversity of the large-cap space.
Third, performance dynamics: The S&P 500’s returns are often driven by the outperformance of its top seven stocks. In contrast, the S&P 493’s performance is a better indicator of how most large-cap stocks are performing. For example, if the Magnificent Seven are soaring but the rest of the market is stagnant, the S&P 500 may show strong gains—while the S&P 493 would reveal the underlying weakness in the broader market.
Why Investors Should Pay Attention to the S&P 493
The S&P 493 matters for three core reasons:
Concentration Risk Assessment
Many investors hold portfolios heavy on mega-cap tech stocks, either directly or through S&P 500 ETFs. The S&P 493 helps identify concentration risk: if your portfolio’s performance is closely tied to the S&P 500 but lags the S&P 493, it may signal overexposure to the Magnificent Seven. This is critical because concentration risk can lead to volatility if those mega-caps underperform.
Market Breadth Indicator
Market breadth refers to how many stocks are participating in a rally or decline. A strong S&P 493 performance alongside the S&P 500 suggests a broad-based rally—considered more sustainable than a narrow rally driven only by a handful of stocks. Conversely, if the S&P 500 is up but the S&P 493 is down, it’s a red flag: the rally is not supported by the broader market and may fizzle out.
Diversification Insights
For investors looking to diversify beyond mega-caps, the S&P 493 offers a blueprint. By analyzing which sectors are performing well in the S&P 493, investors can adjust their portfolios to include more of those sectors—like healthcare or industrials—reducing reliance on tech mega-caps and spreading risk.
Tracking the S&P 493: Proxies and Tools
Since the S&P 493 isn’t an official index, investors use proxies to track its performance. One popular option is the S&P 500 Equal Weight Index, which gives each stock in the S&P 500 the same weight, minimizing the influence of the Magnificent Seven. This index is a close proxy for the S&P 493’s broader market focus.
Exchange-traded funds (ETFs) that track the equal-weight S&P 500 are readily available, making it easy for investors to gain exposure to the S&P 493’s composition. Additionally, some financial data providers offer custom indices that replicate the S&P 493’s makeup, allowing investors to monitor its performance in real time.
How to Incorporate the S&P 493 Into Your Investment Strategy
The S&P 493 isn’t just a market indicator—it’s a actionable tool for investors:
- Benchmark Your Portfolio: Replace or supplement the S&P 500 as a benchmark if you want to assess performance against the broader large-cap market. This is especially useful if your portfolio isn’t heavily weighted toward mega-caps.
- Adjust Allocations: If the S&P 493 is outperforming the S&P 500, it may signal that the broader market is gaining strength. In this case, consider increasing exposure to sectors prominent in the S&P 493, like consumer staples or industrials.
- Hedge Mega-Cap Risk: If you’re concerned about the volatility of the Magnificent Seven, add an equal-weight S&P 500 ETF to your portfolio. This balances out the influence of the top seven stocks, aligning your holdings more closely with the S&P 493.
Conclusion
The S&P 493 may not have the same recognition as the S&P 500, but it’s a powerful tool for investors seeking a clearer view of the U.S. large-cap market. By excluding the Magnificent Seven, it reveals the true performance of the broader market, helping investors assess concentration risk, gauge market breadth, and make informed diversification decisions. Whether you’re a seasoned investor or just starting out, the S&P 493 complements the S&P 500 by offering a more holistic picture of market health. As the market continues to evolve, the S&P 493 will remain a key indicator of the majority of large-cap stocks—proving that sometimes, looking beyond the headline numbers is the key to smarter investing.