Security Future
A security future is a futures contract whose underlying asset is a single equity security (single stock future, SSF) or a narrow-based stock index, standardized by an exchange and subject to both CFTC and SEC joint regulation in the United States under the Commodity Futures Modernization Act of 2000. Security futures trade like commodity futures—with daily mark-to-market and margin requirements—but on individual stocks rather than commodities or broad indices.
Key takeaways
- Single stock futures (SSFs) represent the right and obligation to buy or sell 100 shares of a specific stock at a predetermined price on a future date.
- In the U.S., SSFs are regulated jointly by the SEC and CFTC, reflecting their hybrid nature as both a security and a futures contract.
- Margin requirements for SSFs are typically 20% of the underlying value—leverage of 5:1, compared to 50% initial margin for stock purchases under Regulation T.
- Security futures can replicate leveraged long positions, serve as hedging instruments, or facilitate portfolio adjustments without triggering capital gains events in certain structures.
- The U.S. SSF market (OneChicago exchange, now defunct) never achieved significant liquidity; SSFs are more actively traded in India, South Africa, and South Korea, where they are major equity trading instruments.
Explanation
Security futures were authorized in the United States under the Commodity Futures Modernization Act of 2000, which ended a 21-year moratorium on single stock futures dating from the Shad-Johnson Accord of 1982 (a regulatory demarcation agreement between the SEC and CFTC). The instrument combines the leverage efficiency of futures with the specificity of individual equity exposure, theoretically providing a capital-efficient alternative to margined stock positions and equity options for hedging and speculation.
The pricing of a security future follows the same cost-of-carry framework as equity index futures: F = S × (1 + r - d), where S is the spot stock price, r is the risk-free rate, and d is the expected dividend yield over the futures period. When the risk-free rate exceeds the dividend yield, the futures price trades at a premium to spot; when dividends are high relative to rates (as for mature dividend-paying stocks), futures trade at a discount. Any deviation from this fair value relationship creates an arbitrage opportunity that dealers and proprietary traders will exploit, keeping futures prices tightly linked to spot prices.
The margin structure of SSFs differs meaningfully from both stock margin and broad-based index futures. Under Regulation T, stock purchases require 50% initial margin (2:1 leverage). SSFs require only 20% margin (5:1 leverage), making them significantly more capital-efficient for leveraged exposure. This leverage can be used constructively—for instance, a portfolio manager can gain equivalent exposure to a stock position using less capital and investing the freed capital in Treasury bills, enhancing overall portfolio return through the 'enhanced cash' strategy. However, the leverage also amplifies losses proportionately, making risk management critical for SSF users.
Security futures can also be used for stock replacement strategies. An investor who owns shares with embedded capital gains might sell their position and purchase equivalent SSF exposure, deferring the gain while maintaining economic exposure. However, IRS constructive sale rules limit the tax effectiveness of this approach in many cases. Institutional investors use SSFs in transition management—switching equity exposures between countries or sectors using futures to bridge the gap between selling old positions and receiving settlement proceeds from the sales, maintaining market exposure without 'going flat' during the transition period.
Global markets for SSFs vary dramatically in depth and liquidity. In India, the NSE Futures & Options segment is one of the world's most active SSF markets—single stock options and futures account for a disproportionate share of Indian equity derivatives volume, driven by retail speculation and leveraged positioning. South Korea's KRX single stock futures market is similarly active. In contrast, the U.S. market for SSFs largely failed to develop: OneChicago, the dedicated U.S. exchange for SSFs, shut down in September 2020 after decades of thin volume, attributable to the competing liquidity of listed equity options, the cost-of-capital disadvantage of CFTC margining rules relative to options margin, and the fragmented dealer interest across competing venues.
Formula
SSF Fair Value = S × (1 + r - d)^T; where r = risk-free rate, d = dividend yield, T = time to expiration
Example
An investor wishes to gain exposure to 1,000 shares of a $200 stock (total notional: $200,000) using a single stock future instead of buying the shares outright. The SSF price is $201.50 (spot $200 + 1-year cost of carry at 5% risk-free rate minus 2.5% dividend yield = $200 × 1.025 = $205 for 1 year, or approximately $201.50 for 3 months). The investor buys 10 SSF contracts (each covering 100 shares) at $201.50. Required margin: 20% × $201.50 × 1,000 = $40,300 versus $100,000 required to buy the shares outright under Regulation T. If the stock rises to $215 at expiration, the futures P&L is ($215 - $201.50) × 1,000 = $13,500 on a $40,300 investment—a 33.5% return. If the stock falls to $190, the loss is ($190 - $201.50) × 1,000 = -$11,500, representing a -28.5% loss on the margin invested (versus a proportional -5% loss on the $200,000 outright stock position).
Related terms
Arbitrage Color Cost Of Carry Dividend Dividend Yield Equity Equity Index Exchange Futures Contract Futures Price Hedging Initial Margin