E-mini S&P 500 Futures
The E-mini S&P 500 futures contract (ticker: ES) is an electronically traded futures contract on the S&P 500 index listed on the CME, with a contract value of 50 times the index level, making it one of the most liquid futures instruments in the world.
Introduced by the CME in 1997, the E-mini S&P 500 contract (ES) was designed to give individual traders access to S&P 500 futures at one-fifth the size of the original full-sized S&P 500 contract, which had a multiplier of $250 per index point. At the E-mini's $50 multiplier, a contract with the S&P 500 at 5,000 has a notional value of $250,000 — substantial, but accessible to a broader range of traders than the $1.25 million full-sized contract.
ES trades virtually around the clock on the CME Globex electronic trading platform, from Sunday evening through Friday afternoon U.S. time, with a brief daily maintenance break. This near-continuous trading is one reason ES is used globally as a real-time proxy for U.S. equity market sentiment, even during hours when the New York Stock Exchange is closed. Pre-market price action in ES is closely watched by traders worldwide as an early indicator of where U.S. stocks will open.
Liquidity in ES is extraordinary. Daily volume regularly exceeds one million contracts, representing trillions of dollars in notional value. Bid-ask spreads are often a single tick ($12.50 per contract), making ES one of the most cost-efficient instruments for executing large directional or hedging positions in U.S. equities. Institutional portfolio managers routinely use ES to quickly adjust equity exposure without disturbing underlying stock positions.
ES futures settle quarterly, in March, June, September, and December, via cash settlement based on the Special Opening Quotation (SOQ) of the S&P 500 on expiration Friday morning. Traders who hold contracts to expiration receive or pay a cash amount equal to the difference between the final settlement price and their entry price, times the $50 multiplier, times the number of contracts.
Options on ES futures (also traded at the CME) are available with weekly, monthly, and end-of-quarter expirations, creating an extensive ecosystem of derivatives layered on top of an already liquid underlying.