S&P 500 Index: Live Tracker, Holdings & Sector Breakdown

Frequently Asked Questions

Key questions about the S&P 500 index.

What is the S&P 500 index?

The S&P 500 is a stock market index that tracks the performance of 500 of the largest publicly traded companies in the United States. Maintained by S&P Dow Jones Indices, it is widely regarded as the single best gauge of the U.S. large-cap equity market and covers approximately 80% of available U.S. market capitalization. The index is market-cap weighted, meaning larger companies like Apple, Microsoft, and NVIDIA have a proportionally greater influence on the index's value.

How can I invest in the S&P 500?

The most common way to invest in the S&P 500 is through index funds or ETFs that track it. Popular options include the Vanguard S&P 500 ETF (VOO, 0.03% expense ratio), SPDR S&P 500 ETF Trust (SPY, 0.0945%), and iShares Core S&P 500 ETF (IVV, 0.03%). You can also invest via mutual funds like the Vanguard 500 Index Fund (VFIAX, 0.04%). These funds hold all 500 stocks in proportion to their index weight, giving you instant diversification for a very low cost.

What is the average annual return of the S&P 500?

From 1990 through 2025, the S&P 500 has delivered an average annualized return (CAGR) of approximately 10.4% including dividends. However, returns vary enormously year to year — from −37% in 2008 to +32.4% in 2013. Over any given 20-year rolling period since 1926, the S&P 500 has never produced a negative total return, which is why long-term holding is generally recommended.

What are the 11 sectors in the S&P 500?

The S&P 500 is divided into 11 GICS (Global Industry Classification Standard) sectors: Information Technology (~32%), Financials (~13%), Health Care (~12%), Consumer Discretionary (~10%), Communication Services (~9%), Industrials (~8%), Consumer Staples (~6%), Energy (~4%), Utilities (~2.5%), Real Estate (~2.5%), and Materials (~2%). Technology has dominated the index in recent years due to the growth of mega-cap companies like Apple, Microsoft, and NVIDIA.

How often is the S&P 500 rebalanced?

The S&P 500 is rebalanced quarterly on the third Friday of March, June, September, and December. However, the S&P Index Committee can make changes at any time if a company no longer meets the inclusion criteria (e.g., due to a merger, acquisition, bankruptcy, or significant decline in market cap). To be included, a company must be a U.S. company, have a market cap of at least $18 billion (as of 2026), be highly liquid, have a public float of at least 50%, and have positive earnings in the most recent quarter and over the trailing four quarters.

Data Sources & Methodology

This tracker uses snapshot data, not a live market feed. Sources include:

S&P Global — official index methodology and sector classification
Slickcharts — current S&P 500 holdings and weights
macrotrends.net — historical annual returns data (total return, 1990–2025)
Sector weights and holdings weights are approximate and change daily with market prices

Historical returns calculator uses S&P 500 total return index data (price appreciation + reinvested dividends). The year-end to year-end methodology means a "1990–2000" calculation measures growth from end of 1989 through end of 2000.

S&P 500 Index Tracker

Sector Breakdown

Top 25 Holdings

Historical Returns Calculator

Frequently Asked Questions

Data Sources & Methodology