Anthony Di Pizio, The Motley Fool
6 min read
The S&P 500 (SNPINDEX: ^GSPC) hit a fresh record high on Wednesday, April 15, capping off a spectacular recovery from its recent 9% peak-to-trough decline. Investor sentiment turned positive after the U.S. and Iran reached a ceasefire agreement on April 8, leading to the eventual reopening of the critical Strait of Hormuz waterway which handles 25% of the world’s seaborne oil supply every day.
These positive developments alleviated fears of a global energy shortage, which initially threatened to reignite inflation and dent corporate earnings. But the situation is far from over, because Iran once again restricted commercial vessels from transiting the Strait this weekend, pending further negotiations with the U.S. As a result, it’s unclear whether the recent stock market highs will hold.
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The Vanguard S&P 500 ETF (NYSEMKT: VOO) is an exchange-traded fund (ETF) that directly tracks the performance of the S&P 500 by holding the same stocks and maintaining similar weightings. Should investors buy it following the index’s spectacular recovery? Read on for the surprising answer.
The S&P 500 is a highly diversified index, because it tracks 500 American companies from 11 different sectors of the economy. To qualify for inclusion, a company must be profitable, and it must maintain a market capitalization of at least $22.7 billion. But even after ticking those boxes, a special committee still has the final say over which companies make the cut, which ensures the index maintains the highest possible standards.
The S&P 500 is weighted by market capitalization, so larger companies in the index have a much higher representation than smaller companies, and thus have a greater influence over its performance. Therefore, although the index is diversified, it is quite top-heavy. Below are its three largest sectors by weighting, along with the three most valuable companies within each of them.
|
Sector |
S&P 500 Weighting |
Top Three Companies |
|---|---|---|
|
1. Information Technology |
32.9% |
Nvidia, Apple, Microsoft |
|
2. Financials |
12.6% |
Berkshire Hathaway, JP Morgan Chase, Visa |
|
3. Communication Services |
10.3% |
Alphabet, Meta Platforms, Netflix |
Data source: Vanguard. Sector weightings are accurate as of March 31, 2026, and are subject to change.
