Back
Indices

S&P 100 Index

OEX
$
OEX

Price

OEX
OEX
S&P 100 Index
24h Change 24h Change
24h High 24h High
24h Low 24h Low

Overview

The S&P 100 Index consists of 100 major, established U.S. companies spanning multiple industries. Each constituent is selected based on market capitalization, liquidity, and sector representation. As a subset of the S&P 500, this index reflects some of the most influential corporations within the larger U.S. equity market.

Originally designed to measure performance of large-cap companies with a high market share, the S&P 100 is known for its extensive trading in both the cash market (stocks) and derivatives, such as index options. Because it focuses on the largest corporations, it often experiences lower volatility than broader-market indices, yet it still serves as an important barometer of U.S. economic activity.

By focusing on the largest, most liquid U.S. companies, the S&P 100 Index offers a reliable measure of large-cap market movements. Its track record, breadth, and recognized blue-chip components make it a popular choice for traders and investors seeking balanced yet high-exposure portfolio strategies in the U.S. equity market.

Check leverage and margin requirements quickly through our Margin Calculator.

Price Chart

Candlestick
Area

Technical Details

Index Calculation Market-capitalization-weighted, giving higher weight to companies with higher market values
Rebalancing Frequency Quarterly (alongside the broader S&P indices)
Sector Distribution Technology, finance, healthcare, consumer services, and more
Derivatives Availability Actively traded options (OEX) and index futures contracts

Why Trade S&P 100 Index?

Highly Liquid Instruments

The S&P 100 offers abundant liquidity in both its component stocks and derivative products, facilitating tighter spreads and efficient entry or exit.

Market Stability

Concentration in large-cap corporations often leads to reduced volatility, providing a relatively stable market environment.

Portfolio Hedging

Traders and investors can hedge overall market exposure by using S&P 100–linked derivatives, which track many leading U.S. companies.

Transparent Performance

Since constituents are widely recognized blue-chip names, there is broad coverage and reliable information available.

Pros & Cons

Advantages

  • Highly liquid index, often favored by institutional traders
  • Focuses on industry-leading, large-cap U.S. companies
  • Relatively lower volatility compared to smaller, more concentrated indices

Disadvantages

  • Limited diversification, as it only includes 100 large-cap companies
  • Sector overrepresentation can occur if certain industries dominate
  • Missing the mid- and small-cap coverage found in broader indices

Frequently Asked Questions

How does the S&P 100 differ from the S&P 500? +
The S&P 100 is a subset of the S&P 500, composed of 100 of the largest and most influential U.S. companies. While the S&P 500 offers a wider snapshot of the U.S. market, the S&P 100 focuses on mega-cap, highly liquid stocks.
Can I invest directly in the S&P 100 Index? +
You cannot invest directly in an index; however, you can gain exposure through index funds, ETFs, or derivatives such as options and futures that track the S&P 100.
Does the index only include U.S. companies? +
Yes. The constituents of the S&P 100 Index are large-cap companies primarily headquartered or operating in the United States.
Why is the S&P 100 considered more stable than smaller-cap indices? +
Because it is composed of large, established companies that tend to have diverse revenue streams, stronger balance sheets, and broader market reach, it usually experiences relatively lower volatility compared to smaller-cap benchmarks.
How often is the list of companies in the S&P 100 updated? +
The composition is typically reviewed and adjusted quarterly to maintain alignment with the index’s criteria for market capitalization, liquidity, and representation.

Best Brokers For You

Exness

8 /10

eToro

7.9 /10

Pepperstone

7.9 /10

XM

7.6 /10

IC Markets

7.5 /10
View All Brokers