Spring might seem to have barely started weather-wise in places such as Michigan that saw snow flurries as recently as seven days ago. But according to the latest edition of Black Book Market Insights, spring might well be nearly finished in the auction lanes.

Black Book editors acknowledged that they began to see signs of a tiring spring tax season when they compiled last week’s report. When the editors shared their latest analysis on Wednesday, they indicated those signs became more obvious.

This week’s data showed the largest drop off of the spring for car and truck segments.

In particular focus this week, Black Book noticed the full-size car and upper midsize car segments have continued to perform well in the used market. Editors mentioned three drivers creating this movement may be:

— Low gas prices continue to place stress on smaller car segments.

— The continuously improving economy is incentivizing buyers to consider cars with a little more size.

— Relatively lower supply of full-size cars as compared to compact cars to meet the increased demand.

“The spring market strength is starting to wane as most segments showed slight decline or remained flat in wholesale values last week,” said Anil Goyal, vice president of automotive valuation and analytics at Black Book.

Goyal mentioned a half dozen other developments Black Book editors uncovered, including:

• Overall, the volume-weighted car values decreased by 0.11 percent from last week.

• Overall, the volume-weighted truck values were flat from last week.

• All car segments except full-size car and upper midsize car dropped in value.

• Most truck segments did not change much except for full-size CUV, full-size passenger van and luxury SUV segments which dropped more than 0.4 percent from last week.

• The top three truck segments with the most cumulative value increase over the last eight weeks are compact SUV (up 2.7 percent), full-size pickup (up 2.0 percent) and full-size cargo van (up 1.6 percent).

• The top three car segments with the most cumulative value increase over the last eight weeks are upper midsize car (up 1.5 percent), entry-level car (up 1.5 percent) and compact car (up 1.4 percent).

Along with the data trends, Black Book also shared some dealer comments gathered from the more than 60 auctions representatives attend each week.

A dealer from Minneapolis said, “Internet activity strong today on late-model low-mileage units,” while another dealer from Nashville, Tenn., added, “Plenty of selection but floors still up so a lot of no-sales here today.”

An attendee at a sale in Illinois noted, “Prices are very strong here due to low inventory of clean cars,” as a bidder at a Florida auction noticed, “More no-sales here this week than normally.”

Finally, a buyer in Atlanta touched on some specific units, saying, “Lots of no sales, but pickup trucks and passenger vans continue to be in high demand.”

The entire Black Book report can be downloaded here.