Definition
A short futures position is an obligation under a futures contract that benefits from a decline in the futures price and loses when the futures price rises. Futures can reference commodities, indexes, rates, currencies, and other markets.
Mechanics
Futures use margin differently from stock margin. Initial margin is a good-faith performance bond, and positions are marked to market. If the account falls below maintenance margin because of adverse price movement, more funds may be required.
Worked example
A trader shorts a futures contract at 100. If the contract falls to 95, the short position gains before costs. If it rises to 108, the short position loses. Because the contract notional value can be much larger than the margin deposit, percentage gains and losses relative to posted margin can be large.
Comparison
| Feature | Short futures | Short stock |
|---|---|---|
| Instrument | Derivative contract | Borrowed shares |
| Settlement | Marked to market | Position remains until covered or closed |
| Margin | Performance bond | Securities margin and borrow |
| Borrow fee | No stock borrow fee | Borrow can be a major cost |
Common mistakes
- Treating initial margin as maximum risk.
- Ignoring contract size and notional exposure.
- Holding through roll dates without understanding term structure.
- Applying stock-short intuition to futures mechanics.
Stock Shorter framing
Stock Shorter is primarily focused on equity research, but futures are part of the broader short-exposure toolkit. They are especially relevant for index, commodity, and macro hedging around equity short books.
Educational only. Futures involve leverage and can create substantial losses.