LEARN ROCKPORT VAL / SAMPLE LESSON

Stress the rent. Keep the base.

Apply a scenario shock without overwriting the starting assumption.

Begin the lesson

Keep the base. Test the shock.

ANNUAL MARKET RENT / PER m²−8%

Base assumption£250

Shocked assumption£230

250 × 0.92230

An assumption change. The valuation still needs checking.

Rockport VAL / Shocks workflow.

THE IDEA TO UNDERSTAND

Stress the assumptions. Keep the base.

You need a clearly identified downside case and a base model you can still compare against.

HOW IT WORKS

Use a Shock against the intended version and scenario, rather than editing the base input to create the test. The documented Shocks workflow applies changes to the selected property set while retaining the underlying base assumptions.

The method you will practise

Confirm the version, scenario and properties you intend to test.
Set the market-rent shock and check whether it applies to all selected properties or only particular ones.
Compare the shocked result with the same base version and scenario. A rent change alone does not establish the percentage change in value.

Rockport VAL / Shocks workflow.

THINK IT THROUGH

Does an 8% market-rent reduction prove that the valuation falls by 8%?

Choose what you expect. The feedback will help you test your starting idea.

YOUR TURN

Compare the assumption states

Compare the cases below. Notice what changes, then read the explanation of why.

WHY THIS HAPPENS

£250 × 0.92 = £230. This shows the assumption change only; it is not a software-generated valuation.

CHECK WHAT YOU UNDERSTAND

How should you preserve a reliable comparison in the documented Shocks workflow?

Apply the Shock to the intended version, scenario and property set.Overwrite the base rent and try to remember the old number.Report that value is down 8% without running the model.

Give me a hint

Confirm the version, scenario and properties you intend to test.

TAKE THE SKILL INTO YOUR WORK

Now try it in your software.

On an authorised test scenario, confirm the version and property selection before applying a Shock. Compare the changed assumption and the resulting valuation separately.

WHAT YOU SHOULD BE ABLE TO EXPLAIN

You can set up a traceable stress test and keep a clean comparison.

Need help with your own example?

The Companion is where you ask about the task on your screen. Include your software version, what you changed and the result you expected.

Read this module’s Companion example

This sample checks your reasoning here. It cannot inspect or certify your work in another application.