IRVINE, Calif. -

Auctions values are on the way down as used supply continues to increase.

And with gas prices remaining relatively stable this past month, fuel-efficient small cars and alternative-energy vehicles led the declines in June.

Overall, according to data from Kelley Blue Book’s latest Blue Book Market Report, auction values fell by an average of 1.2 percent in June, with the more fuel-efficient vehicle segments taking the biggest price drops.

KBB explained the compact segments have “been negatively impacted by falling fuel prices as well as low lease offers on new vehicles.”

On the other hand, as construction rates increase, pickup trucks remained “hot” in June, coming in as one of the best performing segments overall with nearly no depreciation last month, according to KBB.

The truck segments have seen better price retention in the lanes most of this past spring and early summer, but have begun to see price declines as July got underway.

So, where are auction values headed?

Buyers are in luck, as prices are expected to continue falling as summer progresses.

“Used-vehicle values should continue to decline at a pace of nearly 1 percent per month through summer, thanks to improving supply conditions at auction and enticing finance and lease offers on news cars,” said Alec Gutierrez, senior market analyst at KBB.

For more analysis of June auction value trends, see Friday’s Auto Remarketing Today.

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