Though the temperature may be rising as we head into the last month of summer, auction prices seem to be dropping on a weekly basis.

According to NADA’s AuctionNet data, prices are expected to drop by 0.3 percent, or $50, this week.

The losses will be led by the luxury car segment, NADA automotive analyst David Paris told Auto Remarketing.

These premium cars are expected to see prices drop by an average of 1.6 percent, or $325, this week.

NADA predicts the compact utilities will see the second largest price decline, dropping by 1 percent, or $150.

Smaller declines are expected in all other segments, Paris said.

In fact, all segments are expected to see prices drop but two: the midsize cars and midsize vans, which are expected to see prices rise by 0.2 percent and 0.3 percent, respectively.

Four- and two-week AuctionNet wholesale average prices are created by collecting all AuctionNet records for vehicles up to five years of age for a specified period of time. Prices are then adjusted for changes in mileage and mix.

Current week prices are based on NADA's proprietary used-vehicle value model which includes assumptions for new-vehicle prices, used-vehicle supply, gasoline prices, and other economic factors.