Black Book Retention Index Dips

By Staff Writer January 08, 2021 85

Black Book released its Used Vehicle Retention Index for December 2020, showing it at 128.8, a 1.8-point decline from November’s 130.6.

“The seasonally adjusted Retention Index has remained relatively stable since August,” said Alex Yurchenko, SVP, data science. “Nevertheless, due to record-setting summer months, the year ended with a 15.5-point (or 13.7 percent) year-over-year change in the Index. In fact, only the Minivan Segment did not have a year-over-year increase in the Index.”  

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 dates to January 2005, where Black Book published a benchmark index value of 100.0 for the market.

During 2020, it saw the largest drops and increases in the Index due to supply and demand pressures during the COVID-19 pandemic. 

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Last modified on Friday, 08 January 2021 15:26