Market Watch · U.S. large caps

S&P 500

A broad view of large U.S. companies, weighted by float-adjusted market capitalization.

All markets

Snapshot · Sep 4, 2026

Benchmark history

S&P 500

7,718.60−29.11 (−0.38%)Latest session · Sep 4, 2026
S&P 500, weekly closes over the past 12 months6,0006,5007,0007,5008,000OctNovDecJanFebAprMayJunJulAug7,719
S&P 500, weekly closes over the past 12 months6,0006,5007,0007,5008,000OctDecFebAprJunAug7,719

The chart uses available weekly observations. Period boundaries may fall between observations; the dates shown identify the actual comparison.

1 month
+0.1%
3 months
+4.5%
Year to date
+12.8%
12 months
+20.3%

Price changes exclude dividends and fees. Indexes are unmanaged and cannot be invested in directly. Past performance does not guarantee future results.

Previous close · index points
7,747.71
Session low · index points
7,706.12
Session high · index points
7,750.19
52-week low · index points
6,316.91
52-week high · index points
7,816.70

Understanding the benchmark

What does this index mean?

The S&P 500 brings together leading large U.S. companies in one measure. It gives more influence to companies with a larger market value of publicly available shares. Its level is expressed in index points, not the cost of buying a portfolio.

Why should I care?

This is a common reference for the large-company stock portion of a portfolio. Seeing it alongside small companies, sectors, and bonds helps explain why your own investments may have a different experience.

What it leaves out.

It does not cover every U.S. company, bonds, or the full global economy. Large constituent weights can make the index rise even when many of its companies fall. A balanced portfolio is not designed to match an all-stock index every day.

Explore the index publisher’s explanation ↗

A question worth asking.

Is this an appropriate comparison for my stock holdings, and what benchmark fits the rest of my plan?

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