LAWRENCEVILLE, Ga. -

Autumn officially arrived on Monday, and perhaps dealers might start to see wholesale prices cooling in the lanes, too, if the latest Black Book Market Insights report is any indication.

Analysts spotted overall price decreases last week for both cars and trucks at greater rates than the previous four-week average. Along with fall’s arrival, Black Book executive vice president of operations Anil Goyal discussed another potential reason for the movement.

“Used-vehicle prices are starting to show weakness after a strong summer season,” Goyal said in the latest report.

“Auctions reported lower sales percentages as sellers held on to higher floors,” continued Goyal, who is among the experts on tap to appear during Used Car Week, which begins on Nov. 11 in Las Vegas.

Volume-weighted, Black Book reported that overall car segment values decreased by 0.25% last week. That’s a bit higher than the average (0.19%) analysts noticed during the previous four-week stretch.

Among cars, analysts determined values of prestige luxury, luxury, and midsize cars dropped the most, dipping by 0.58%, 0.35% and 0.43%, respectively.

Again, volume-weighted, Black Book found that overall truck segment values (including pickups, SUVs, and vans) declined by 0.39% last week. That’s nearly double the previous four-week average, which was 0.20%.

In truck space, analysts said values of all three categories of luxury SUVs slid the most as compacts were off by 0.77%, midsize by 0.69% and full-size by 0.61%.

Wrapping up the latest report, Black Book relayed some of the best anecdotes it received from representatives stationed at nearly 60 sales nationwide. Here is the rundown:

— From Tennessee: “We had a lot of no-sales today even though the dealers continue to say that the market remains good.”

— From Indiana: “The truck prices seem to be holding steady in spite of the incentives on the new ones.”

— From Wisconsin: “The market here is OK for September, but there is downward pressure on the values as well as lower sales percentages.”

— From Georgia: “Overall, the quantity and quality of the vehicles declined. Sold prices were definitely down compared to the last few weeks.”