【Trade Mechanics】How a Price Fixation Works in Metal Trading
Quote from chief_editor on June 14, 2026, 5:30 pmPrice fixation in metal trading explained. Learn how LME price fixation works, who controls it, and how it affects physical contract settlement.
Price fixation in metal trading refers to the instruction given by one party in a physical metal contract to determine the LME (London Metal Exchange) price that will be used for invoice calculation. In many physical metal supply contracts, the final price is not known at the time of shipment — it is determined by the LME price on specific dates within a defined pricing window. The party who controls when and at which price within that window the price is fixed can extract commercial advantage from price movements during the period.
Price fixation refers to the formal instruction — typically given by the buyer or seller as specified in the contract — to apply a specific LME official price on a specific date, or series of dates, as the benchmark for calculating the physical contract invoice.
How Fixation Timing Works
In a standard physical copper contract, the pricing clause might specify that the buyer has the right to fix the price — called a buyer's fixation — on any business day within the pricing window of, for example, three months from the contract date. Buyer's fixation gives the buyer the flexibility to choose when to lock in the LME price, allowing the buyer to wait for a price dip if they expect the market to weaken.
Alternatively, the pricing clause might specify seller's fixation — the seller determines when to apply the LME price within the window. Seller's fixation benefits the seller who expects prices to rise, because the seller can delay fixing until they believe the price has peaked within the available window.
In many standard contracts — particularly for copper cathode under standard London Metal Exchange-related terms — the pricing window is shorter and more defined: for example, the average of five LME Official Cash Settlement prices following the Bill of Lading (BL) date. In this case, neither party individually controls the timing — the dates are predetermined by the BL date, and the average is calculated mechanically from published LME data.
For example, assume a copper trading company sells 500 metric tons of cathode to a rod mill under a contract that gives the buyer fixation rights over a 30-day window following shipment. The buyer believes copper prices will fall from the current level of $9,200 per metric ton. The buyer waits 15 days and, observing that prices have indeed fallen to $9,050, sends a fixation instruction to apply the LME Official Cash Settlement price of that day. The final invoice price is $9,050 plus the agreed premium, rather than $9,200 plus premium — a saving of $150 per metric ton × 500 MT = $75,000.
How Traders Hedge Fixation Exposure
The party who has granted fixation rights to the counterparty carries a form of price uncertainty — they do not know exactly when the price will be fixed or at what level. A seller who grants buyer's fixation knows the metal will be priced at some point during the window, but not on which day. To manage this uncertainty, the seller typically hedges by selling LME futures for the entire pricing window — selling futures equivalent to the physical volume for each day in the window — and then covering the sold futures day by day as the buyer exercises fixation, buying back the futures for the specific day the buyer has fixed.
This hedging approach, known as a back-pricing hedge or fixation hedge, ensures that whether the buyer fixes early or late in the window, the seller's net position — physical sale price minus futures gain or loss — results in a consistent margin regardless of market direction.
The right to fix price is therefore not merely an operational convenience — it is a commercial tool that has real value when prices are moving. Contracts should specify fixation rights clearly, including the notice period required for fixation instructions, the method of calculation (Official Cash Settlement or another published LME price), and what happens if the buyer or seller fails to exercise fixation before the window closes.
Price fixation is the mechanism that converts the LME's continuous trading into a specific settlement price for a physical metal contract — the party who controls the fixation timing controls a real commercial variable that affects the final invoice value.
Price fixation in metal trading explained. Learn how LME price fixation works, who controls it, and how it affects physical contract settlement.
Price fixation in metal trading refers to the instruction given by one party in a physical metal contract to determine the LME (London Metal Exchange) price that will be used for invoice calculation. In many physical metal supply contracts, the final price is not known at the time of shipment — it is determined by the LME price on specific dates within a defined pricing window. The party who controls when and at which price within that window the price is fixed can extract commercial advantage from price movements during the period.
Price fixation refers to the formal instruction — typically given by the buyer or seller as specified in the contract — to apply a specific LME official price on a specific date, or series of dates, as the benchmark for calculating the physical contract invoice.
How Fixation Timing Works
In a standard physical copper contract, the pricing clause might specify that the buyer has the right to fix the price — called a buyer's fixation — on any business day within the pricing window of, for example, three months from the contract date. Buyer's fixation gives the buyer the flexibility to choose when to lock in the LME price, allowing the buyer to wait for a price dip if they expect the market to weaken.
Alternatively, the pricing clause might specify seller's fixation — the seller determines when to apply the LME price within the window. Seller's fixation benefits the seller who expects prices to rise, because the seller can delay fixing until they believe the price has peaked within the available window.
In many standard contracts — particularly for copper cathode under standard London Metal Exchange-related terms — the pricing window is shorter and more defined: for example, the average of five LME Official Cash Settlement prices following the Bill of Lading (BL) date. In this case, neither party individually controls the timing — the dates are predetermined by the BL date, and the average is calculated mechanically from published LME data.
For example, assume a copper trading company sells 500 metric tons of cathode to a rod mill under a contract that gives the buyer fixation rights over a 30-day window following shipment. The buyer believes copper prices will fall from the current level of $9,200 per metric ton. The buyer waits 15 days and, observing that prices have indeed fallen to $9,050, sends a fixation instruction to apply the LME Official Cash Settlement price of that day. The final invoice price is $9,050 plus the agreed premium, rather than $9,200 plus premium — a saving of $150 per metric ton × 500 MT = $75,000.
How Traders Hedge Fixation Exposure
The party who has granted fixation rights to the counterparty carries a form of price uncertainty — they do not know exactly when the price will be fixed or at what level. A seller who grants buyer's fixation knows the metal will be priced at some point during the window, but not on which day. To manage this uncertainty, the seller typically hedges by selling LME futures for the entire pricing window — selling futures equivalent to the physical volume for each day in the window — and then covering the sold futures day by day as the buyer exercises fixation, buying back the futures for the specific day the buyer has fixed.
This hedging approach, known as a back-pricing hedge or fixation hedge, ensures that whether the buyer fixes early or late in the window, the seller's net position — physical sale price minus futures gain or loss — results in a consistent margin regardless of market direction.
The right to fix price is therefore not merely an operational convenience — it is a commercial tool that has real value when prices are moving. Contracts should specify fixation rights clearly, including the notice period required for fixation instructions, the method of calculation (Official Cash Settlement or another published LME price), and what happens if the buyer or seller fails to exercise fixation before the window closes.
Price fixation is the mechanism that converts the LME's continuous trading into a specific settlement price for a physical metal contract — the party who controls the fixation timing controls a real commercial variable that affects the final invoice value.