While the auction value for the average vehicle segment declined 1 percent between May 1 and May 29, there were a few segments in Kelley Blue Book’s data set that bucked the trend, including three that actually showed an increase.

The latest Blue Book Market Report breaks down the top five and bottom five performing segments in May, based on Kelley Blue Book Auction Values on model-year 2012 through 2014 vehicles.

At No. 1 on the top performers list is the sporty compact car, whose auction prices went up 3.7 percent over the four weeks. Next were full-size pickup trucks, which climbed 1.4 percent.

“Despite the overall decline in segment values, the full-size pickup truck segment had a good month led by the Chevrolet Silverado, Ford F-150, Toyota Tundra and GMC Sierra, all gaining just more than 2 percent this month,” KBB said in its analysis.

The only other segment to show an increase was the sports car segment with a 0.1-percent hike.

Tied for fourth on the list were high performance cars and minivans/vans. Values in both of these segments were down 0.2 percent.

Conversely, electric vehicle values had the steepest drop during the period (3.6 percent), followed by subcompact cars (down 3.3 percent), compact cars (down 2.5 percent), midsize cars (down 2.4 percent) and luxury cars (down 2.2 percent).

KBB shared some additional perspective on the overall drop in used values this past month: “The downturn we are seeing in used-car values comes as no surprise for this time of year. Typically, used-car values rise throughout the first part of the year and begin to trend downwards throughout the remainder of the year.

“The average overall yearly decline for the last two years has been nearly 9 percent when comparing average vehicle values from January to December,” the company noted. “Additionally, Kelley Blue Book expects off-lease supply to negatively impact values further as they begin to return to the market later this year.”