Quick Answer
A seller who owns or will produce the cash commodity fears a price decline. Buying a put, the right to sell futures at the strike, sets a minimum selling price (a floor) equal to strike minus the premium paid. Unlike a short futures hedge, a rising market stays available, net of that premium.
The seller already has one tool for a falling market: a short futures hedge that locks the selling price. A long put is the alternative that does the same protective job while leaving the door open to a higher price. The trade-off is the premium, and everything in this section builds from that single fact.
Who Uses the Long Put and What They Fear
This is the hedge of a seller: a party who owns the cash commodity now (an inventory holder, a grain elevator) or who will produce and sell it later (a producer, a farmer).
- This is the same short hedger met in the hedging-theory unit in Chapter 1 and the short-and-long-hedging unit: the one who is long the cash and therefore long the basis (holding the physical, or committed to producing it, and exposed to the cash price).
- The fear is a price decline before the cash is sold. A lower price means less revenue for the same physical bushels or barrels.
Two tools protect against that decline:
| Tool | How it works | What it costs | The favorable move (a rise) |
|---|---|---|---|
| Short futures hedge | Sell futures now, buy them back at sale time | No premium | Surrendered (the futures loss cancels the cash gain) |
| Long put | Buy a put on the futures, the right to sell at the strike | The premium | Kept (sell the physical into the higher market) |
A put is the right, not the obligation, to sell futures at the strike price. It sets a minimum selling price (a floor) while leaving the seller free to sell at a higher price if the market rises.
Exam Tip: Gotchas
- The seller uses a put, never a call. A producer who fears a price drop and "buys a call to protect against it" is the classic trap, and it is backwards. The seller will be a seller of the physical, so the option that helps is the right to sell (a put). A call is the buyer's tool.
- A put is the right to sell, not to buy. The put gains value as price falls, which is exactly what offsets the seller's shrinking cash value in a declining market.
The Long Put Sets a Price Floor
A put gains value as price falls, so it offsets the loss on the cash inventory in a declining market. That offset is what creates the floor.
- Effective floor (minimum selling price) = put strike price minus premium paid. The premium is subtracted because it is a real, up-front cost the seller pays whether or not the put is ever exercised.
- If the cash price falls below the strike, the put is exercised (or sold at a gain) and the seller's net proceeds cannot drop below the floor. The put has done its job.
- If the cash price rises above the strike, the put is left to expire worthless; the seller loses only the premium and sells the physical commodity into the higher market. This is the one-sided benefit a short futures hedge cannot give: the upside is kept.
- Maximum loss on the option is the premium. A long option can never cost more than what was paid for it, a point carried over from the option-theory unit. The premium is the price of the insurance.
Think of it this way: the put is a price-insurance policy on the sale. The strike is the coverage level, the premium is the policy cost, and the floor is what the coverage is actually worth after paying for it. If disaster (a price crash) never comes, the seller is out only the premium and still sells at whatever the market offers.
Exam Tip: Gotchas
- The floor is strike MINUS premium, not strike plus premium. The premium works against the seller because it is a cost the seller pays. Adding the premium to the strike inflates the floor and inverts the math. Subtract it.
- The floor holds no matter how far price falls, but only net of the premium. The seller is never worse off than the floor on the downside, yet is always poorer than the raw strike by the premium amount, because that cost is paid either way.
Worked Calculation: Producer Floor Price
A producer will have a commodity to sell in the fall and fears a price drop. The futures market is near 6.00 per unit (for grain, read this as dollars per bushel). The producer buys a 6.00-strike put for a premium of 0.20 per unit.
Step 1: Set the floor.
| Line | Figure (per unit) |
|---|---|
| Put strike price | 6.00 |
| Premium paid | minus 0.20 |
| Effective floor (minimum selling price) | 5.80 |
No matter how far the market falls, the producer's net minimum selling price is 5.80, because the cash sale is lifted by the gain on the put.
Step 2: Test a falling market (price drops to 5.40).
| Line | Figure (per unit) |
|---|---|
| Cash sale near | 5.40 |
| Gain on the 6.00 put (worth about) | plus 0.60 |
| Premium paid | minus 0.20 |
| Net proceeds | 5.80 |
The floor holds: 5.40 plus 0.60 minus 0.20 is 5.80. Foots.
Step 3: Test a rising market (price climbs to 6.50).
| Line | Figure (per unit) |
|---|---|
| Cash sale near | 6.50 |
| Put expires worthless (lose the premium) | minus 0.20 |
| Net proceeds | 6.30 |
The put expires, the producer loses only the 0.20 premium, and sells the physical near 6.50: net 6.50 minus 0.20 is 6.30. Foots. A short futures hedge locked near 6.00 would have surrendered that gain; the put kept it, net of the premium.
- The option helps only net of the premium: the producer is better off than an unhedged decline, and better off than a short futures hedge in a rally, but always 0.20 poorer than the raw cash price, because the premium is paid either way.
Exam Tip: Gotchas
- In a rally, the long put beats the short futures hedge; on the floor, they protect the same. Both fully cover the decline. The put's edge shows up only when price rises: the short futures hedger is stuck near the locked price, while the put holder banks the higher sale minus the premium.
- When the put expires worthless, that is the good outcome, not a loss to fear. Prices rose, so the physical sells high. The expired premium is the cost of having kept that upside, and it is the option's maximum loss.
Long Put Versus Short Futures Hedge for the Seller
Both tools remove the seller's downside. They differ on the favorable move and on cost.
| Feature | Short futures hedge | Long put |
|---|---|---|
| Protects a price decline | Yes | Yes |
| Premium cost | None | The premium paid |
| If price rises | Rise is surrendered (futures loss offsets cash gain) | Rise is kept (sell high, lose only the premium) |
| Result on the downside | Selling price locked | Selling price floored at strike minus premium |
| Best when the seller | Wants cost-free certainty and does not care about a rally | Will pay the premium to keep a possible rally |
Think of it this way: the short futures hedge nails the seller's price to the wall, up or down. The long put builds a floor under the price but leaves the ceiling open. The premium is the price of that open ceiling.
Exam Tip: Gotchas
- The put's advantage is not "no cost." It costs the premium. Its advantage is keeping the favorable direction (a rising market) that the short futures hedge gives up. An answer selling the put as the free or cheaper choice misreads the trade-off.