Suezmax Fuel Sensitivity with Partly Fixed Price Inputs

Overview

The worksheet must also explain whose expense it represents and how, if at all, that expense relates to the proposed freight terms. A modelled change is not automatically a payment owed by the cargo interest.

Key takeaways

• Define the exposed quantity before applying a price scenario.
• Keep physical quantity, price basis, and contract allocation separate.
• Show alternative assumptions without presenting them as predictions.
• Retain the evidence supporting any fixed-price classification.

Identify the exposure the decision actually concerns

A chartering analyst may be asked why an owner has revised an indication, whether a route alternative is sensitive to fuel prices, or how a proposed adjustment mechanism behaves. State which question the model is intended to answer before choosing inputs.

An internal expense model can use a defined planning basis even when no procurement commitment exists. In that case, label the fixed input as a scenario assumption rather than evidence of a completed purchase or protected exposure.

If the analysis relies on an actual commercial commitment, the responsible team should verify its quantity, price, scope, and conditions. Do not infer that all voyage fuel is fixed merely because a supplier quotation or prior purchase appears in the file.

The same discipline applies to freight. The contracting team should identify the relevant allocation and adjustment wording. Check the current text instead of assuming that a fuel movement passes through to the charterer in a standard way.

Separate quantity status from price status

A quantity estimate describes how much fuel the model assumes for its defined scope. Price status describes the basis used to value that quantity. Both need evidence, and a confident price does not make an uncertain quantity more reliable.

Obtain the relevant voyage quantity assumptions from the owner or authorised qualified source. The commercial analyst should not create a Suezmax performance estimate from a generic class description or prescribe operational measures to reduce the result.

For the price basis, distinguish a confirmed arrangement, a current indication, and an analytical stress. Record the source date and applicable product or delivery basis where relevant. These categories should not be hidden behind a single price column.

IMO's marine fuel information describes sulphur controls under the pollution-prevention framework. See the official overview. Relevant fuel assumptions require qualified confirmation; price alone does not establish suitability.

Calculate a partly exposed illustrative case

This simplified example uses fictional figures and a single modelled fuel category. The fixed-price portion is an analytical assumption only. It is not evidence of a real purchase, a hedge, vessel performance, or current market conditions.

ILLUSTRATIVE: fictional Suezmax fuel-price exposure

Assume a total modelled quantity of 500 tonnes. Of that amount, 200 tonnes are valued at a fixed scenario price of USD 580 per tonne, while 300 tonnes remain exposed to the scenario price.

At a base exposed price of USD 600 per tonne, total expense is 200 × 580 + 300 × 600 = USD 296,000. At an exposed price of USD 660 per tonne, it becomes USD 314,000, an increase of USD 18,000.

Applying the same USD 60 per tonne increase to all 500 tonnes would imply USD 30,000 of additional expense. That would exceed the correctly scoped scenario increase by USD 12,000.

The arithmetic shows why the exposure boundary matters. It does not establish which quantities should be classified as fixed in a real transaction. That classification needs evidence from the responsible commercial source.

Test what happens if the classification is wrong

Before relying on the result, ask what supports the fixed portion. If it is only a planning assumption, present another scenario in which more of the quantity is exposed. If the underlying arrangement has conditions, identify the circumstances under which the model would need revision.

Do not confuse price certainty with quantity certainty. A changed itinerary may require a revised quantity assumption even when part of the price basis remains unchanged. The analyst should request a new relevant input rather than carry forward the original total automatically.

If several fuel categories are involved, repeat the exposure classification for each rather than applying one blanket percentage. The categories may have different price evidence or commercial treatment. A simplified combined model should disclose what it leaves out.

The decision paper should identify which uncertainty is material. If changing the classification alters the recommendation, better evidence is needed before the result is used to support commitment. If the decision remains the same, the limitation should still be stated accurately.

Fictional case: a quotation is mistaken for a fixed expense

A fictional crude buyer reviews an owner's explanation of a revised Suezmax indication. An internal spreadsheet treats an earlier supplier quotation as though it fixed part of the voyage's fuel expense and concludes that the owner's price sensitivity is overstated.

The chartering manager asks the responsible team to verify the quotation's status and scope. The evidence does not establish the commitment assumed by the analyst. The model is revised to distinguish a fixed-input scenario from a scenario with a larger exposed quantity.

The buyer uses the revised sensitivity to ask informed questions, while the owner explains its commercial basis. The contracting team separately reviews whether any fuel-related adjustment is part of the proposed agreement.

The correction prevents a plausible spreadsheet from being used as proof of a fact that had never been established.

Present a result that can be challenged constructively

The summary should state the model boundary, input status, scenario change, and decision implication. A reviewer should be able to identify the assumption most worth challenging without inspecting every formula.

Keep owner-quoted freight distinct from modelled expense. If the two are compared, explain why and identify other elements of the employment that remain outside the fuel calculation. The comparison should generate questions rather than imply a complete explanation of pricing.

Retain the input and calculation version in the transaction record. When a new quotation, commitment, or voyage assumption arrives, update the relevant case and explain whether the recommendation changes.

After the decision, review whether the model was used within its stated purpose. If colleagues treated a scenario as an actual procurement position, improve the status labels and approval note before expanding the analysis.

Common mistakes

Applying a price movement to the entire modelled quantity can misstate exposure when the analysis assumes a partly fixed basis. The opposite error is classifying a quantity as fixed without evidence.

Avoid treating a supplier indication as a completed commitment. Verify the status and scope through the responsible team.

Do not infer contractual reimbursement from an expense model. Check the current agreement and obtain the appropriate commercial or legal assessment.

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