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【Roles and Intermediaries】What a Ship Broker Does in Commodity Trade

Ship broker role in commodity trade explained. Learn how brokers fix vessels, negotiate freight, and earn commission in physical commodity shipping.


A ship broker is an intermediary who arranges the chartering of vessels — connecting shipowners who have vessels available for hire with charterers who need to transport cargo. In physical commodity trading, ship brokers are essential commercial partners: they provide market intelligence on available vessels and freight rates, negotiate charter party terms on behalf of their clients, and manage the communication between shipowners and charterers throughout the chartering process. The ship broker earns a commission — called address commission or brokerage — typically 1.25% of the agreed freight, payable by the shipowner.

The difference between a ship broker and a freight forwarder is that a ship broker operates in the charter market — dealing with the hiring of entire vessels for bulk cargo — while a freight forwarder arranges container space and logistics services for smaller shipments that do not require a whole vessel.

How Ship Brokers Fix a Vessel

The vessel fixing process begins when a commodity trading company informs their ship broker that they have a cargo requiring transportation. The broker receives the cargo details — commodity type, quantity, loading port, discharge port, laycan (loading window), and any special requirements such as vessel age limits or flag restrictions — and begins canvassing the market for suitable available vessels.

The broker contacts shipowners and their brokers — often through a network of broking relationships — to identify vessels that match the cargo requirements and are available within the laycan. The broker presents a list of suitable candidates to the charterer (the trading company), who selects a preferred vessel based on age, specifications, and the shipowner's reputation.

Negotiation of the freight rate and charter party terms then begins. The shipowner's broker proposes an initial rate; the charterer's broker counters. Additional terms — demurrage rate, despatch rate, cargo exclusions, and any special clauses — are negotiated in a series of exchanges that typically take hours to one or two days. Once all terms are agreed, the charter party is described as fixed — the vessel is booked and both parties are committed.

For example, assume a grain trading company needs to ship 50,000 metric tons of soybeans from Santos, Brazil, to Rotterdam, Netherlands, within a 10-day loading window starting in 20 days. The ship broker receives the cargo instructions and identifies three Panamax vessels currently in South Atlantic waters that could make the Santos laycan. The broker negotiates on behalf of the trading company, achieving a freight rate of assume $22 per metric ton — $1.1 million total freight — and agrees demurrage of $15,000 per day in the charter party. The fixture note (a summary of all agreed terms) is exchanged between the broking teams, confirming the deal.

The Broker's Information Role

Beyond fixing individual vessels, ship brokers provide an important market intelligence function. A broker who is active in the Panamax bulk carrier market has visibility across dozens of fixture negotiations happening simultaneously — they know which vessels are available, which routes are congested, how freight rates have moved in the past week, and which shipowners are pricing competitively. This market intelligence is commercially valuable to trading companies that need to assess freight cost inputs before pricing a CFR or CIF cargo.

Cargo brokers — brokers who specialize in finding cargo for shipowners — work the other side of the market, approaching trading companies to find cargo that matches available vessel positions. Major broking houses including Clarksons, BRS Group, Gibsons, and Arrow Ship Brokers operate globally and maintain extensive networks across both the vessel and cargo sides of the market.

Ship brokers in the tanker market operate under similar principles but with different vessel classes — Very Large Crude Carriers (VLCCs), Suezmax, Aframax, and product tankers — and typically use a Worldscale rate framework rather than flat per-ton rates for dry bulk.

A ship broker's commercial value lies in their market knowledge, negotiating skill, and counterparty network — they compress the time and cost of fixing a vessel by connecting the right charterer to the right shipowner at the right price, earning their commission by making a market where no centralized exchange exists.