Black Book August’s Used Vehicle Retention Index Increased Again After a Brief Break in July
The seasonally adjusted Retention Index increased to 165.7 points, barely missing another record.

The seasonally adjusted Retention Index increased to 165.7 points, barely missing another record.
LAWRENCEVILLE, Georgia – Black Book, a division of Hearst that provides industry-leading used vehicle valuation and residual value forecast solutions, released its Used Vehicle Retention Index for August 2021 which increased to 165.7 points, 3.9 points (or 2.4%) increase from July (161.8). The Index currently stands 28.5% above where it was the same time last year.
“After a brief break in July, wholesale prices started to increase at the end of August as the industry came to the realization that the new inventory shortage will worsen in the fall,” said Alex Yurchenko, Chief Data Science Officer at Black Book. “Dealers accelerated the acquisition of used inventory in anticipation of emptier new vehicle lots. In addition to the chip shortage, Hurricane Ida flooded large portions of the Southeast and Northeast, potentially aggravating inventory problems. We anticipate prices to remain strong at least through October."
The Black Book Used Vehicle Retention Index is calculated using Black Book’s published Wholesale Average value on two- to six-year-old used vehicles, as percent of original typically equipped MSRP. It is weighted based on registration volume and adjusted for seasonality, vehicle age, mileage, and condition. The Index offers an accurate, representative, and unbiased view of the strength of today’s used vehicle market values.
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