As we enter the fall market, auction prices are continuing to weaken.

According to NADA AuctionNet data, prices are expected to drop by 0.7 percent or $100 this week.

That’s after cars dropped by an average of $66 and the trucks fell by $45 last week, according to Black Book data.

All the segments NADA tracks are expected to see price declines this week, sans one.

Interestingly, though most high-end units have been softening in the lanes, luxury utilities are expected to see prices grown by 0.3 percent or $75, marking the only segment predicted to see price increases this week.

On the other hand, the percentage price drops will be led by the compact segment, according to AuctionNet data. This segment is predicted to fall by 1.3 or $125 this week.

The large pickups are expected to follow with one of the biggest monetary drops, falling by 1.2 percent or $250.

Analysts expect prices to continue falling in this segment as unusually strong price retention for this segment in the first half of the year is causing a bit of a market correction.

Losses for the remaining segments will be less significant, said David Paris, NADA automotive analyst.

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.