ACV Auctions lost a lot of money last year. It will lose money this year, too.ACV Auctions (ACVA 12.85%) stock tumbled 15.1% through 11:20 a.m. ET Tuesday after reporting mixed earnings last night.Heading into the Q4 report, analysts forecast ACV would lose a penny a share on $182 million in sales. As it turned out, the online used-car marketplace beat the sales forecast, reporting $183.6 million. ACV badly missed the earnings projection, however, losing $0.11 per share for the quarter . ACV Q4 earningsIt w ...