Sporty cars saw the highest depreciation among cars last week at 1.45 percent, according to Black Book’s latest Market Insights report.

All other car segments tracked by Black Book stayed under the 1 percent mark last week.

“The sporty car segment declined the most, following typical seasonal patterns as summer draws to a close,” said Anil Goyal, senior vice president of automotive valuation and analytics for Black Book. “The car segments continue to experience a steeper decline in values in comparison to pickups and SUVs.”

Volume weighted, overall car segment valued decreased by 0.77 percent last week, which was slightly higher than the rate of 0.69 percent seen in the previous four weeks. After sporty cars, the segments with the highest depreciation levels were full-size cars at 0.96 percent, and subcompact cars and luxury cars, both at .80 percent.

Meanwhile, volume weighted, overall truck segment values decreased by 0.44 percent last week — similar to the depreciation rate of 0.42 percent seen in the previous four weeks.

Among trucks, compact vans declined the most at 1.98 percent. Full-size vans, however, depreciated by 0.52 percent. Other truck segments coming in above the half-a-percentage-point mark were midsize luxury crossovers/SUVs (0.68 percent), compact crossovers/SUVs (0.60 percent), compact luxury crossovers/SUVs (0.58 percent) and subcompact crossovers (0.54 percent).

The report noted that the retention rates of midsize cars were steady during the past years until this year, when they declined by 4 percentage points. For model year 2013 midsize cars, the retention in September 2015 was 53 percent. For model year 2014 midsize cars, retention this September has dropped to 49 percent.

View from the lanes

Black Book editors and personnel look for trends at dozens of auctions throughout the U.S. each week. Last week, auction spotters in Minnesota and Pennsylvania noted low attendance.

“Lower volume of attendance and consignment this week by plenty of internet activity,” noted the former, while the latter noted low attendance but normal consignment, “with SUVs bringing the most demand.”

Demand for SUVs, trucks and high-end vehicles was strong at a location in California, while a lane watcher in Florida reported that open-top utilities and midsize trucks were in demand and doing well.

“The market is good here but things have slowed down a bit with more no-sales as of late,” said a Black Book rep in Texas.

Finally, in Washington, a rep noted that “the market trend in this area is ranging from average to slow.”