Quick Answer
A speculator who is bearish on a futures price can buy a put instead of shorting the future. The put gives the right to be short at the strike, so its worst case is the premium paid, unlike the short future's open-ended loss. Profit begins once the futures falls below breakeven, which equals the strike minus the premium.
A bearish speculator can short the future, or buy a put on it for the same view with a capped worst case. This is the mirror of the long call, with one sign flipped and one much bigger reason to prefer the option: the short future it replaces has an open-ended loss.
The Bearish, Limited-Risk Substitute
A speculator who is bearish (expects the futures price to fall) has two ways to act on it.
| Tool | Direction | Worst case | Cost to enter |
|---|---|---|---|
| Short futures | Profits as price falls | Unlimited loss as price rises (no ceiling) | No premium (post performance-bond margin) |
| Long put | Profits as price falls below breakeven | Loses only the premium | The premium paid |
A put is the right, not the obligation, to go short the future at the strike price. That right lets the speculator profit on a decline while capping the downside at the premium.
- Risk is limited to the premium paid. The most a long put can lose is the premium, and that happens when the futures finishes at or above the strike (the put expires worthless).
- The short future's loss is theoretically unlimited. A futures price has no ceiling, so a short future can keep losing without bound as the market rises. This is the decisive advantage of the put. A bearish speculator who is told to keep risk "limited" or "defined" is being steered from the short future to the long put.
- The premium is a sunk cost, and no margin is posted. As with the call, the futures must fall past a breakeven before the position nets a profit, and the put buyer's only capital at risk is the premium.
Think of it this way: shorting a future is a bearish bet with no safety net above you. Buying a put is the same bet with the ceiling bolted on. The premium is what the ceiling costs, and the market has to drop past the strike and then past the premium before the bet pays.
Exam Tip: Gotchas
- The put's decisive edge is a capped loss versus the short future's unlimited loss. Both profit on a decline, but the short future can lose without bound on a rally while the put's loss stops at the premium. "Keep risk limited" points to the put every time.
- A put is the right to be SHORT the future, not long. The put gains as price falls, which is what a bearish speculator wants. An answer that says the put holder "goes long" has the direction backwards.
Breakeven, Profit, and Return on Equity
The three calculations mirror the long call, with the breakeven sign flipped.
- Breakeven = strike price minus premium. Note the sign: the put subtracts the premium (the call added it). The futures must fall to the strike and then keep falling by the premium to break even.
- Profit at expiration = (strike minus futures price) minus premium, once the futures is below the strike. Above the strike, the loss is fixed at the full premium.
- Return on equity (ROE) = net profit divided by premium paid. Same logic as the long call: no margin is posted, so the premium is the equity outlay and the ROE denominator.
Exam Tip: Gotchas
- The long put breakeven SUBTRACTS the premium. Breakeven is strike minus premium, not strike plus premium. Adding the premium is the call's rule, and applying it to a put inverts the math. This opposite-sign pair (add on the call, subtract on the put) is the top calculation trap in the unit.
- ROE still divides by the premium. A put buyer posts no margin, so the premium is the whole equity outlay. Dividing a bought put's profit by a margin figure uses the wrong base.
Worked Example: Crude Oil Put
A speculator is bearish on crude oil and buys one crude oil futures 80 put for a 4-point premium. Assume the futures finishes at 68 at expiration.
Step 1: Find the breakeven.
- Breakeven = strike minus premium = 80 minus 4 = 76.
- The futures must fall below 76 before the position nets a profit.
Step 2: Value the put at expiration.
- Intrinsic value = strike minus futures = 80 minus 68 = 12 points.
- The put finished 12 points in the money.
Step 3: Net the profit and the return.
| Line | Figure (points) |
|---|---|
| Intrinsic value at expiration | 12 |
| Premium paid | minus 4 |
| Net profit | 8 |
- Net profit = 12 minus 4 = 8 points. Foots.
- ROE = net profit divided by premium = 8 divided by 4 = 200%.
Step 4: Check the worst case against the short future.
- If the futures had instead finished at or above 80, the put would expire worthless and the loss would be the 4-point premium, and nothing more.
- Compare a short future entered at 80: at the 68 finish it gains the same 12 points gross. But if the market instead rallied to 100, the short would lose 20 points and keep losing with no ceiling, while the put's loss stays pinned at its 4-point premium. That is the open-ended risk the put removes.
Exam Tip: Gotchas
- The put's profit is net of the premium (8), not the raw intrinsic value (12). The put was worth 12 at expiration, but 4 was paid to hold it. An answer reporting 12 as the profit skipped the premium.
- In the rally scenario, the short future's loss has no cap; the put's does. A short at 80 that rises to 100 is down 20 and counting; the put holder is down only 4. This is the whole point of substituting the put for the short future.