The Margin Looked Good on the Day It Was Booked. That Was the Last Good Day.
Quote from Guest on May 14, 2026, 9:29 amThe margin calculated when a commodity trade is booked rarely survives contact with execution. How costs between booking and settlement consume profits.
The trade was booked with a margin of $8.50 per MT. Copper concentrate, 12,000 MT, FOB Antofagasta to CIF Lianyungang. Purchase price: LME November minus TC of $75 per MT. Sale price: LME November minus TC of $62 per MT plus a premium of $4.50. Gross margin: $8.50 per MT ($62 minus $75 equals negative $13 in TC improvement, plus $4.50 premium, wait — the math was the TC spread of $13 plus the premium of $4.50, less freight of $9 per MT). The actual breakdown: the trader captured the TC differential between buy and sell terms, plus the premium, minus freight and costs. Net projected margin: $8.50 per MT, or $102,000 on 12,000 MT.
The final P&L showed $14,200. Roughly 14% of the projected margin. The erosion was not caused by any single failure. It was the accumulation of costs that appeared between the booking date and the settlement date — each individually manageable, collectively margin-consuming.
The Costs That Appear After Booking
Freight was fixed at $9 per MT, as budgeted. But the vessel arrived 3 days before the laycan. The owner requested early berthing. The terminal could not accommodate it. The vessel waited. Bunker costs during waiting: approximately $11,000. Not chargeable to anyone — the charter party did not penalize the owner for early arrival, and the terminal was not obliged to berth early.
Financing: the LC was opened 8 days before loading. LC issuance fee at 1.0%: $10,200. The cash cycle — from LC honor to buyer payment — was 68 days. Interest at 8% on approximately $10.2 million for 68 days: approximately $152,000. Wait — the trade was worth $10.2 million? No, the copper concentrate at $850 per MT landed cost times 12,000 MT equals approximately $10.2 million. The financing cost was modeled at $110,000. The actual cost was $152,000 because the cash cycle was 68 days instead of the modeled 50 days. The 18-day extension came from discharge delays (5 days) and the buyer's bank processing time (13 days). Additional financing cost: approximately $42,000.
Inspection and sampling: load port PSI at $12,500. Discharge port survey at $9,800. Umpire sample retention and analysis: $3,200. Total: $25,500 against a budget of $20,000.
Demurrage: the vessel waited 2 days at discharge port anchorage before berthing. Demurrage at $18,000 per day: $36,000. The contract specified that the buyer would bear discharge demurrage, but the buyer disputed the NOR timing and ultimately paid only $22,000. The trader absorbed $14,000.
Hedging: the LME hedge was rolled from November to December. Roll cost: $6,800. Futures commission: $2,400.
Bank and documentation charges: SWIFT fees, document courier, amendment fees: $3,800.
The Margin Is the Hypothesis. The P&L Is the Result.
Total costs beyond commodity and freight: approximately $87,800 against a budget of approximately $52,000. The overrun was $35,800. The projected margin of $102,000 less the actual cost stack of $87,800 yielded $14,200 — approximately $1.18 per MT against a projected $8.50 per MT.
No single cost item was catastrophic. The financing overrun of $42,000 was the largest — caused by 18 days of extended cash cycle. The demurrage absorption of $14,000 was the second. The inspection overage of $5,500 was the third. Each was within the range of normal variation for a physical commodity trade. Together, they reduced the margin by 86%.
This is the reality of physical commodity trading margins that newer traders and people entering from procurement or finance consistently underestimate. The margin at booking is a projection based on assumptions about the cash cycle, the logistics timeline, the inspection cost, the bank charges, the demurrage exposure, and the hedge cost. Every assumption has a variance. The variances almost always run in one direction — costs are higher than estimated, timelines are longer than planned, and charges appear that were not in the original model.
The traders who generate consistent net margins do so by modeling the cost stack conservatively at the time of booking — using the high end of the range for each cost item, adding a contingency of 10 to 15 percent, and only booking the trade if the projected margin exceeds the conservative cost estimate. The traders who book trades at the midpoint estimate of each cost item and treat the projected margin as the expected margin will consistently report actual margins that are 30 to 70 percent below projections.
The copper concentrate trade made $14,200. The trader did not lose money. But on $10.2 million of committed capital, the return was 0.14% — a number that questions whether the trade justified the risk, the capital allocation, and the operational effort. The margin looked good on the day it was booked. That was the last time it looked good. Everything that happened between booking and settlement took a piece of it, and the pieces added up to almost everything.
Keywords: trade margin erosion execution cost physical commodity | commodity trade margin vs actual profit, execution cost physical trading, physical commodity margin calculation, trading margin erosion post-booking
Words: 803 | Source: Market observation — WorldTradePro editorial research | Created: 2026-04-08
The margin calculated when a commodity trade is booked rarely survives contact with execution. How costs between booking and settlement consume profits.
The trade was booked with a margin of $8.50 per MT. Copper concentrate, 12,000 MT, FOB Antofagasta to CIF Lianyungang. Purchase price: LME November minus TC of $75 per MT. Sale price: LME November minus TC of $62 per MT plus a premium of $4.50. Gross margin: $8.50 per MT ($62 minus $75 equals negative $13 in TC improvement, plus $4.50 premium, wait — the math was the TC spread of $13 plus the premium of $4.50, less freight of $9 per MT). The actual breakdown: the trader captured the TC differential between buy and sell terms, plus the premium, minus freight and costs. Net projected margin: $8.50 per MT, or $102,000 on 12,000 MT.
The final P&L showed $14,200. Roughly 14% of the projected margin. The erosion was not caused by any single failure. It was the accumulation of costs that appeared between the booking date and the settlement date — each individually manageable, collectively margin-consuming.
The Costs That Appear After Booking
Freight was fixed at $9 per MT, as budgeted. But the vessel arrived 3 days before the laycan. The owner requested early berthing. The terminal could not accommodate it. The vessel waited. Bunker costs during waiting: approximately $11,000. Not chargeable to anyone — the charter party did not penalize the owner for early arrival, and the terminal was not obliged to berth early.
Financing: the LC was opened 8 days before loading. LC issuance fee at 1.0%: $10,200. The cash cycle — from LC honor to buyer payment — was 68 days. Interest at 8% on approximately $10.2 million for 68 days: approximately $152,000. Wait — the trade was worth $10.2 million? No, the copper concentrate at $850 per MT landed cost times 12,000 MT equals approximately $10.2 million. The financing cost was modeled at $110,000. The actual cost was $152,000 because the cash cycle was 68 days instead of the modeled 50 days. The 18-day extension came from discharge delays (5 days) and the buyer's bank processing time (13 days). Additional financing cost: approximately $42,000.
Inspection and sampling: load port PSI at $12,500. Discharge port survey at $9,800. Umpire sample retention and analysis: $3,200. Total: $25,500 against a budget of $20,000.
Demurrage: the vessel waited 2 days at discharge port anchorage before berthing. Demurrage at $18,000 per day: $36,000. The contract specified that the buyer would bear discharge demurrage, but the buyer disputed the NOR timing and ultimately paid only $22,000. The trader absorbed $14,000.
Hedging: the LME hedge was rolled from November to December. Roll cost: $6,800. Futures commission: $2,400.
Bank and documentation charges: SWIFT fees, document courier, amendment fees: $3,800.
The Margin Is the Hypothesis. The P&L Is the Result.
Total costs beyond commodity and freight: approximately $87,800 against a budget of approximately $52,000. The overrun was $35,800. The projected margin of $102,000 less the actual cost stack of $87,800 yielded $14,200 — approximately $1.18 per MT against a projected $8.50 per MT.
No single cost item was catastrophic. The financing overrun of $42,000 was the largest — caused by 18 days of extended cash cycle. The demurrage absorption of $14,000 was the second. The inspection overage of $5,500 was the third. Each was within the range of normal variation for a physical commodity trade. Together, they reduced the margin by 86%.
This is the reality of physical commodity trading margins that newer traders and people entering from procurement or finance consistently underestimate. The margin at booking is a projection based on assumptions about the cash cycle, the logistics timeline, the inspection cost, the bank charges, the demurrage exposure, and the hedge cost. Every assumption has a variance. The variances almost always run in one direction — costs are higher than estimated, timelines are longer than planned, and charges appear that were not in the original model.
The traders who generate consistent net margins do so by modeling the cost stack conservatively at the time of booking — using the high end of the range for each cost item, adding a contingency of 10 to 15 percent, and only booking the trade if the projected margin exceeds the conservative cost estimate. The traders who book trades at the midpoint estimate of each cost item and treat the projected margin as the expected margin will consistently report actual margins that are 30 to 70 percent below projections.
The copper concentrate trade made $14,200. The trader did not lose money. But on $10.2 million of committed capital, the return was 0.14% — a number that questions whether the trade justified the risk, the capital allocation, and the operational effort. The margin looked good on the day it was booked. That was the last time it looked good. Everything that happened between booking and settlement took a piece of it, and the pieces added up to almost everything.
Keywords: trade margin erosion execution cost physical commodity | commodity trade margin vs actual profit, execution cost physical trading, physical commodity margin calculation, trading margin erosion post-booking
Words: 803 | Source: Market observation — WorldTradePro editorial research | Created: 2026-04-08