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Sales ComparisonMEDIUM16.4% of exam

What is one rule of thumb about the number of adjustments and comparability, and what is considered a better indicator?

Correct Answer

B) More adjustments mean less comparability; gross adjustment is better

One rule of thumb is that the more adjustments a sale needs, the less comparable it is; the absolute gross adjustment, which weights each difference by its market-derived amount, is perhaps a better indicator.

Answer Options
A
More adjustments mean a better comparable; net adjustment is better
B
More adjustments mean less comparability; gross adjustment is better
C
The number of adjustments does not matter; sale price is better
D
Fewer adjustments mean a worse comparable; the median is better

Why This Is the Correct Answer

Option B is correct because one rule of thumb is that the greater the number of adjustments, the less comparable the sale. The absolute gross adjustment is perhaps a better indicator of comparability. Adding adjustments without regard to sign shows the total amount of difference the appraiser had to account for.

Why the Other Options Are Wrong

Option A: More adjustments mean a better comparable; net adjustment is better

Option A says more adjustments mean a better comparable and that net adjustment is better. Both parts are reversed: more adjustments suggest less comparability, and net adjustment can hide large offsetting differences, so gross adjustment is the better indicator.

Option C: The number of adjustments does not matter; sale price is better

Option C says the number of adjustments does not matter and that sale price is better. The rule of thumb is that more adjustments mean less comparability, and the sale price alone does not measure how similar the property is to the subject.

Option D: Fewer adjustments mean a worse comparable; the median is better

Option D says fewer adjustments mean a worse comparable and that the median is better. Fewer adjustments suggest a more comparable sale, and the median is not the stated indicator; absolute gross adjustment is.

Gross shows the gap

Net can cancel out; gross adds the size of each adjustment, so it better shows how different a sale really is.

How to use: Use this when comparing the reliability of adjusted comparables.

Exam Tip

Remember that a near-zero net adjustment does not by itself mean a sale is highly comparable.

Common Mistakes to Avoid

  • -Judging comparability by net adjustment alone
  • -Believing more adjustments make a better comparable

Concept Deep Dive

Analysis

This question tests how comparability is judged from adjustments. One rule of thumb says the more adjustments a sale needs, the less comparable it is. The absolute gross adjustment is perhaps a better indicator because it reflects the size of each adjustment, not just the count.

Background Knowledge

Net adjustment is the sum of adjustments with signs, so positive and negative adjustments can offset. Gross adjustment adds the absolute values, showing the total magnitude of differences. A sale with a small net but large gross adjustment may be less comparable than it appears.

Real-World Application

Two comparables both show a net adjustment of about $2,000. One has a gross adjustment of $4,000 and the other $60,000 from large offsetting adjustments, so the appraiser gives more weight to the first.

gross adjustmentnet adjustmentcomparabilityreconciliationrule of thumb
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