As we begin to sense subtle signs of fall in the air, Black Book opted to take a look at which cars and trucks have seen the biggest depreciation at this time of year over the last decade.

According to the analysis, that distinction goes to cars in the prestige luxury segment, followed by a handful of other luxury-type segments.

From 2006 to 2016, prestige luxury cars have had their prices drop an average of 5.63 percent during July, August and September. Last year, prices for this segment dropped 5.9 percent, and in 2009 prices saw their largest three-month plummet (10.6 percent). Vehicles in this category include the Audi A8, BMW 7-Series, Lexus LS/SC, Porsche Panamera, and the Mercedes-Benz 400, 420, 500 and 600.

Luxury car (5.23 percent), full-size luxury CUV/SUV (4.83 percent), and midsize luxury CUV/SUV (4.83) are the segments that have seen the next-highest depreciation entering the fall season.

 “Dating back to 2006, we have seen a number of factors contribute to the rise and fall of used-vehicle prices, many of which are supply- and demand-related,” said Anil Goyal, senior vice president of automotive valuation and analytics at Black Book. “When looking at the three-month retention average among all segments entering fall over the last 10 years, many of the hardest-hit vehicles are in the luxury segments, which have struggled with retention strength due to increasing supply levels and higher MSRPs, which can lead to more volatile retention swings during this time of the year.

“What’s more,” he continued, “many of these luxury vehicles are now seeing slightly lower demand as car shoppers look to less expensive non-luxury vehicles that now offer technology and features that rival that of luxury types.”

Full-size pickups (10-year average third-quarter depreciation of 1.67 percent) and small pickups (1.78 percent) have seen the most retention strength in the three months entering fall. Lower supply levels and strong demand over the last several years have been contributing factors.