By Elena Vasquez

The SONAR Tender Rejection Index climbed to 14.17% this week — an unusual mid-October spike that FreightWaves analyst Zach Strickland, presenting the data in a SONAR Market Update, called a significant and unexpected development. What makes the move notable is what is not behind it: the SONAR Tender Volume Index shows no demand-side surge, meaning the tightening is being driven entirely by a shortfall in truckload supply.

"The only explanation is that we still have continued market imbalance," Strickland said. "Supply is still not sufficient to cover demand in terms of truckload capacity."

Mid-October is typically a brief breathing period before the holiday rush, Strickland noted, which makes the breadth of the current disruption all the more striking. The SONAR Weighted Rejection Index is flashing elevated readings across a wide swath of the country simultaneously.

Where is the tightening concentrated?

Markets showing unusual disruptive activity include:

• Knoxville
• Harrisburg
• Memphis
• Atlanta
• Green Bay
• Des Moines
• Los Angeles
• Ontario, Calif.
• El Paso

Distribution-center-heavy markets such as Columbus, Harrisburg and Atlanta stand out because those hubs usually absorb inbound capacity from westbound lanes rather than repel it.

"To see this as broad and stretched across the country is something that is worth noting," Strickland said. "The weighted rejection index jumping up in all these places all at once is weird because a lot of that freight ends in those markets."

What is happening on the West Coast?

Los Angeles and Ontario are receiving special attention. Record import volumes moved through the Port of Los Angeles in September, Strickland noted, and he described the maritime peak this year as a "prolonged plateau" rather than a traditional spike. Lean retailer inventories — the product of just-in-time ordering strategies — are now triggering a broad replenishment push that is stretching truckload capacity from the West Coast eastward.

The numbers bear that out at the lane level. Los Angeles van rejection rates are up 1.87 percentage points week over week, spot rates are running well above contract, and 38% of the market's top 50 lanes are showing spot-market tightening signals.

Why haven't spot rates responded yet?

Spot rates have not yet caught up to the rejection surge, but the lag has a mechanical explanation. Tender lead times are running 3.5 to 4 days, while spot freight is being booked a day or less out — a gap that explains why the rate indexes have not yet reflected the tightening signals.

Strickland said he expects the National Truckload Index, the Regional Truckload Index, and possibly the Flatbed Truckload Index to move higher within the coming week as the squeeze works through the market. Not every market is tightening, however: Houston is showing the strongest softening signals in the van market, partially offsetting the national picture.

What about refrigerated capacity?

In the reefer segment, Milwaukee is posting the tightest conditions among major refrigerated markets, while Stockton, Calif., is showing the softest signal. The divergence within a single equipment segment underscores how unevenly the capacity shortfall is distributed.

Strickland cautioned that despite lower overall demand, the market remains volatile heading into the holiday season. "This market is still very unstable and you really can't fall asleep on it just yet," he said.

For shippers, the message is one of timing: with rejections at 14.17% and spot lead times compressed to a day or less, freight booked on contract terms faces a rising risk of falling to the spot market at a premium. For carriers, the same numbers signal near-term pricing leverage in the affected markets. With rate indexes expected to move higher within the week, the tightening looks set to test capacity plans just as peak-season volume arrives.