In line with best statistical practices, the MLS® HPI is reviewed annually. Coverage may be revised when results from the Annual Review are implemented each June.

For example, HPI coverage may now extend to areas within markets where sales volumes were previously too low but have picked up enough to support Benchmark price tracking. On the other hand, HPI coverage may have been discontinued for areas where sales have become too sparse to support Benchmark price calculations.

To ensure HPI coverage is consistent and comparable, historical aggregate and composite data may have been recalculated based on revised and consistent coverage.