Continuing a theme in the Black Book Market Insights report series, wholesale truck prices are softening amid the spring selling season’s peak. 

And, really, the early part of 2016, in general. 

This downturn for many segments so far this year runs contrary to the trends spotted in the second half of last year, according to Black Book — and the last three weeks, the softness in values has been particularly noticeable, the company said, for segments like compact utilities and pickups.

A few truck categories are, as Black Book senior vice president of automotive valuation and analytics Anil Goyal put it, “facing the inevitable.”

For trucks, the three-week rate of decline in values has been 0.35 percent. For cars, it has been 0.13 percent. Last week, the decrease for car values was 0.04 percent. For trucks, it was 0.3 percent.

“Some truck segments are facing the inevitable,” Goyal said in the report. “Half of all truck segments declined at a higher rate than the luxury car segment, the cars’ worse performing weekly segment.”

So, what does Goyal mean by “inevitable?” Well, the strength they’ve shown in recent times won’t last forever, Black Book explained. 

With additional truck supply hitting the market (which has already started to happen in 2016), prices will fall, the company said. 

One other nugget from this week’s report: two car segments (compacts, up 0.4 percent; sporty cars, up 0.05 percent) actually increased in value last week. The compact car, in particular, had its highest weekly retention in more than a year. Aside from the flat subcompact crossover, all truck segments were down.