Used-vehicle sales are expected to increase just under 1% this year, according to a forecast from Cox Automotive, with overall used volume expected to climb from 35.9 million sales to 36.2 million and retail used sales (those involving a dealer) projected to climb from 19.0 million to 19.2 million.

The year closed a positive note, with dealers seeing approximately a 3% month-over-month rise in used-car sales in December, with year-over-year sales up 1%, Cox said, citing an initial estimate based on data from its vAuto unit.

Software, marketing, and data firm ZeroSum also ...