In a “what comes up, must come down” type of scenario, certain vehicles that have seen fairly good retention thus far in 2016 are starting to see their values drop.

“The truck segments, particularly SUVs and pickups, are beginning to see larger declines after experiencing strong retention so far this year,” Anil Goyal, senior vice president of automotive valuation and analytics for Black Book, said in the latest Market Insights report.

Analysts at Black Book noticed increased depreciation last week for full-size vans, midsize crossover SUVs and full-size pickups. Their values fell by 1.02 percent, 0.75 percent and 0.74 percent, respectively, over the previous week.

Volume-weighted, overall truck segment values for vehicles up to 8 years old decreased by 0.58 percent last week, higher than the depreciation rate of 0.43 percent seen in the previous four weeks.

Overall car segment values, also volume-weighted, decreased by 0.57 percent last week, better than the depreciation rate of 0.66 percent seen in the previous four weeks.

Sporty cars, prestige luxury cars and compact cars declined the most at 1.20 percent, 0.99 percent and 0.82 percent, respectively.

Analysts pointed out that two truck segments — subcompact luxury crossovers and compact crossovers/ SUVs — had the best retention of any car or truck segment last week, with prices dipping by just 0.24 percent and 0.37 percent, respectively.

Going back to full-size pickups, Black Book noted that the retention rate for this segment has been climbing for the past few years, but has dipped by 2 percentage points this year. For 2-year-old model-year 2010 vehicles, retention was 56 percent. For MY 2013, that figure was 66 percent; it’s now at 64 percent for MY 2014 vehicles.

At auctions last week, Black Book editors and personnel reported a range of findings.

The news from grim for a lane watcher in Texas, who noted slow lanes with lots of no sales.

“A tough day to buy or sell,” he said.

An auction spotter in Minnesota said: “Lower volume of vehicles and dealer attendance today but still had strong internet activity on the right vehicles.”

And one in Washington said that many prices seemed to be down, though trucks were still above average.

A Black Book rep in Ohio reported that sedans, SUVs and trucks were in fairly good demand.

Finally, in Michigan: “Very large consignment today with buyers being very picky of what they bid on.”