The Cargo Was Sold Three Times While Still on the Water.
Quote from chief_editor on April 22, 2026, 5:19 amCommodities sold multiple times while in transit create documentary chains where each party's risk depends on every other party performing. How strings work.
A cargo of 62,000 MT of thermal coal loaded at Richards Bay was sold FOB to a Singapore trader. The Singapore trader sold it CIF to a Dubai-based trading house while the vessel was transiting the Indian Ocean. The Dubai company sold it CIF to an Indian power utility while the vessel was rounding the Arabian Peninsula. By the time the vessel arrived at Mundra, the cargo had been the subject of three separate sales contracts, three separate LCs, and three separate sets of document presentation requirements. The cargo had not changed. The vessel had not deviated. Only the documentary chain had grown.
This is a string trade — a series of back-to-back sales of the same cargo while it is in transit. String trades are common in coal, oil products, metals, and grain. They serve a legitimate commercial purpose: they allow traders to take advantage of market movements by selling cargo they have already purchased at a higher price, and they provide liquidity and price discovery in commodity markets.
The risk in a string trade is that each link in the chain depends on every other link performing. If any party in the string fails — defaults on payment, refuses to accept documents, becomes insolvent, or is sanctioned — the failure cascades through the chain.
The Documentary Chain Gets Longer but the Time Window Does Not
In the coal string described above, the original BL was issued at Richards Bay with the South African miner as shipper and the Singapore trader's bank as consignee. The Singapore trader needed to endorse the BL and present it to the Dubai company (or the Dubai company's bank) under the second sale's LC. The Dubai company then needed to endorse the BL and present it to the Indian utility's bank under the third sale's LC. Each presentation had its own deadline — the LC expiry date.
The vessel transit from Richards Bay to Mundra is approximately 14 to 18 days. The original documents must travel from the load port to Singapore (3-4 days by courier), be checked and processed by the Singapore trader (1-2 days), be endorsed and presented to the Dubai company's bank (2-3 days by courier), be checked and processed by the Dubai company (1-2 days), and then be presented to the Indian utility's bank (2-3 days). Total documentary chain transit: 9 to 14 days. The voyage is 14 to 18 days. The documentary processing timeline nearly matches the voyage time, leaving minimal buffer for errors, discrepancies, or courier delays.
If any document in the chain has a discrepancy — wrong description, mismatched amounts, incorrect dates — the correction process consumes days that the timeline does not have. In a two-party trade, a document discrepancy is manageable. In a three-party string, a discrepancy at the first link delays every subsequent link. The Dubai company cannot present to the Indian bank until they receive documents from the Singapore trader. The Indian bank cannot examine documents until the Dubai company presents them. A 2-day delay at the first link becomes a 2-day delay at every subsequent link.
The operational requirement for string trades is that the documentary requirements of each subsequent LC must be compatible with the documents available from the prior sale. If the Indian utility's LC requires a quality certificate from a specific surveyor, but the original quality certificate was issued by a different surveyor at Richards Bay, the Singapore trader or the Dubai company must arrange for a certificate from the required surveyor — which may not be possible if the surveyor did not attend the loading.
Traders who participate in string trades build their LC terms to accommodate the string by ensuring that document requirements at each level are either identical to or less restrictive than the requirements at the prior level. They specify surveyors that are acceptable to all parties in the chain before loading. They build time buffers into each LC expiry date — typically 5 to 7 days beyond the minimum needed for document transit — to absorb processing delays.
The Price Risk in a String Is Not the Same as in a Single Trade
The market price at the time the string is assembled may differ from the market price at the time of discharge. Each party in the string has locked in their margin at the time of their sale. But if the market declines sharply during transit, the end buyer — the Indian utility — may use the string's documentary complexity as commercial advantage. A minor discrepancy that would be waived in a two-party trade becomes a basis for rejection in a string where the buyer has a financial incentive to walk away.
Conversely, if the market rises sharply, a party early in the string may attempt to default on their sale to capture the higher market price — selling the cargo directly to an alternative buyer rather than passing it through the string. This default leaves the subsequent parties in the chain without documents and without cargo, despite having LCs and buyers in place.
The coal cargo arrived at Mundra. The documentary chain processed — barely — with the final presentation reaching the Indian bank one business day before the LC expiry. The string worked. This time. The margins were thin: the Singapore trader made $1.80 per MT, the Dubai company made $1.20 per MT, and the Indian utility received coal at the prevailing market price. The aggregate margin across the string was approximately $3 per MT — roughly $186,000 shared among three parties. The total transaction costs — LCs, inspections, courier, bank charges — across the string were approximately $120,000. The net value created by the string was $66,000, distributed across three companies, two banks, and four courier shipments.
The traders who operate in string markets do so because they can identify marginal opportunities that individually are small but aggregate across many trades. The traders who are caught in strings when they fail — when one party defaults, when a document is delayed, when a buyer rejects at the end of the chain — discover that the string's efficiency in distributing margin is matched by its efficiency in distributing risk. The margin is shared. The loss is concentrated on whoever was holding the cargo when the chain broke.
Keywords: cargo resale in transit physical commodity trade string | commodity string trading risk, in-transit cargo sale chain, documentary chain physical commodity, multi-party cargo trade risk
Words: 1049 | Source: Market observation — WorldTradePro editorial research | Created: 2026-04-08
Commodities sold multiple times while in transit create documentary chains where each party's risk depends on every other party performing. How strings work.
A cargo of 62,000 MT of thermal coal loaded at Richards Bay was sold FOB to a Singapore trader. The Singapore trader sold it CIF to a Dubai-based trading house while the vessel was transiting the Indian Ocean. The Dubai company sold it CIF to an Indian power utility while the vessel was rounding the Arabian Peninsula. By the time the vessel arrived at Mundra, the cargo had been the subject of three separate sales contracts, three separate LCs, and three separate sets of document presentation requirements. The cargo had not changed. The vessel had not deviated. Only the documentary chain had grown.
This is a string trade — a series of back-to-back sales of the same cargo while it is in transit. String trades are common in coal, oil products, metals, and grain. They serve a legitimate commercial purpose: they allow traders to take advantage of market movements by selling cargo they have already purchased at a higher price, and they provide liquidity and price discovery in commodity markets.
The risk in a string trade is that each link in the chain depends on every other link performing. If any party in the string fails — defaults on payment, refuses to accept documents, becomes insolvent, or is sanctioned — the failure cascades through the chain.
The Documentary Chain Gets Longer but the Time Window Does Not
In the coal string described above, the original BL was issued at Richards Bay with the South African miner as shipper and the Singapore trader's bank as consignee. The Singapore trader needed to endorse the BL and present it to the Dubai company (or the Dubai company's bank) under the second sale's LC. The Dubai company then needed to endorse the BL and present it to the Indian utility's bank under the third sale's LC. Each presentation had its own deadline — the LC expiry date.
The vessel transit from Richards Bay to Mundra is approximately 14 to 18 days. The original documents must travel from the load port to Singapore (3-4 days by courier), be checked and processed by the Singapore trader (1-2 days), be endorsed and presented to the Dubai company's bank (2-3 days by courier), be checked and processed by the Dubai company (1-2 days), and then be presented to the Indian utility's bank (2-3 days). Total documentary chain transit: 9 to 14 days. The voyage is 14 to 18 days. The documentary processing timeline nearly matches the voyage time, leaving minimal buffer for errors, discrepancies, or courier delays.
If any document in the chain has a discrepancy — wrong description, mismatched amounts, incorrect dates — the correction process consumes days that the timeline does not have. In a two-party trade, a document discrepancy is manageable. In a three-party string, a discrepancy at the first link delays every subsequent link. The Dubai company cannot present to the Indian bank until they receive documents from the Singapore trader. The Indian bank cannot examine documents until the Dubai company presents them. A 2-day delay at the first link becomes a 2-day delay at every subsequent link.
The operational requirement for string trades is that the documentary requirements of each subsequent LC must be compatible with the documents available from the prior sale. If the Indian utility's LC requires a quality certificate from a specific surveyor, but the original quality certificate was issued by a different surveyor at Richards Bay, the Singapore trader or the Dubai company must arrange for a certificate from the required surveyor — which may not be possible if the surveyor did not attend the loading.
Traders who participate in string trades build their LC terms to accommodate the string by ensuring that document requirements at each level are either identical to or less restrictive than the requirements at the prior level. They specify surveyors that are acceptable to all parties in the chain before loading. They build time buffers into each LC expiry date — typically 5 to 7 days beyond the minimum needed for document transit — to absorb processing delays.
The Price Risk in a String Is Not the Same as in a Single Trade
The market price at the time the string is assembled may differ from the market price at the time of discharge. Each party in the string has locked in their margin at the time of their sale. But if the market declines sharply during transit, the end buyer — the Indian utility — may use the string's documentary complexity as commercial advantage. A minor discrepancy that would be waived in a two-party trade becomes a basis for rejection in a string where the buyer has a financial incentive to walk away.
Conversely, if the market rises sharply, a party early in the string may attempt to default on their sale to capture the higher market price — selling the cargo directly to an alternative buyer rather than passing it through the string. This default leaves the subsequent parties in the chain without documents and without cargo, despite having LCs and buyers in place.
The coal cargo arrived at Mundra. The documentary chain processed — barely — with the final presentation reaching the Indian bank one business day before the LC expiry. The string worked. This time. The margins were thin: the Singapore trader made $1.80 per MT, the Dubai company made $1.20 per MT, and the Indian utility received coal at the prevailing market price. The aggregate margin across the string was approximately $3 per MT — roughly $186,000 shared among three parties. The total transaction costs — LCs, inspections, courier, bank charges — across the string were approximately $120,000. The net value created by the string was $66,000, distributed across three companies, two banks, and four courier shipments.
The traders who operate in string markets do so because they can identify marginal opportunities that individually are small but aggregate across many trades. The traders who are caught in strings when they fail — when one party defaults, when a document is delayed, when a buyer rejects at the end of the chain — discover that the string's efficiency in distributing margin is matched by its efficiency in distributing risk. The margin is shared. The loss is concentrated on whoever was holding the cargo when the chain broke.
Keywords: cargo resale in transit physical commodity trade string | commodity string trading risk, in-transit cargo sale chain, documentary chain physical commodity, multi-party cargo trade risk
Words: 1049 | Source: Market observation — WorldTradePro editorial research | Created: 2026-04-08