Less-than-truckload carrier Old Dominion Freight Line (NASDAQ: ODFL) reported accelerating yield growth in August, though tonnage remained slightly negative, according to a Thursday update. Old Dominion is one of the largest and most consistently profitable LTL carriers in the U.S., moving multiple customer shipments on a single truck, and its monthly volume and pricing disclosures are widely watched as an early read on freight demand and the broader industrial economy.

The Thomasville, North Carolina-based company's daily revenue increased 12.4% year over year in August, an improvement from the 8.2% y/y growth logged in July. Diesel fuel prices increased 46% y/y in August, compared with a 31% y/y increase in July, and fuel was up 10% sequentially in August. Less-than-truckload fuel surcharge programs include a step function as diesel prices rise, which typically results in better margins.

Old Dominion's yield growth accelerated from July both with and without fuel surcharges. August revenue per hundredweight (yield) was likely 13% higher y/y with fuel surcharges and roughly 5.5% higher excluding fuel. The July growth rates were 9.3% and 4.2%, respectively. Combined growth rates for the two months were 11.3% and 4.8%, respectively. Higher shipment weights were a modest drag on the yield metrics in both months.

"Old Dominion produced solid revenue growth for July and August, with underlying demand trends remaining relatively consistent as the quarter has progressed," said Marty Freeman, president and CEO, in a news release. "In addition, the strength and consistency of our industry-leading service continue to support the ongoing improvement in our LTL revenue per hundredweight."

Tonnage declined 0.9% y/y in August, in line with July's 1% y/y decline, and the carrier faced a slightly easier prior-year comparison in the recent month. On a two-year-stacked comparison, tonnage was off 10.1% in August, slightly worse than the 9.3% decline in July.

August's tonnage result was driven by a 2.4% decline in daily shipments, partially offset by a 1.7% increase in weight per shipment. Shipment weights have been moving higher as the industrial economy improves.

The Institute for Supply Management's Manufacturing PMI logged an eighth straight month in positive territory in August. The 54.6 reading was 60 basis points light of expectations and 1 percentage point below the four-year high recorded in July. A reading above 50 signals expansion, while one below 50 indicates contraction. The new orders subindex, an indicator of future activity, fell 3 points to 53.7. Carrier tonnage trends typically lag the index by three months, meaning the August softness in new orders would, if that historical pattern holds, weigh on carrier volumes into the fall.

The overall reading was a little worse than expected, and the new orders figure drew attention from market watchers. Shares of publicly traded LTLs gapped lower following the Tuesday update, closing the day down between 4% and 7%, while the S&P 500 was off just 0.7%. The outsized reaction reflects how sensitive freight equities are to forward demand signals, since LTL carriers' profits depend heavily on sustained volume and pricing momentum.

August Numbers Support Q3 Guidance

Old Dominion's quarter-to-date results support the higher end of management's third-quarter guidance. Revenue is trending toward a 10% y/y increase, or $1.55 billion, in line with the current consensus estimate. Yield growth was expected to moderate to a range of plus-4% to plus-4.5% y/y, but August appears to have exceeded that.

Third-quarter operating ratio guidance calls for 150 to 200 basis points of sequential deterioration from the 70.1% second-quarter unadjusted OR, which included a real estate gain. In trucking, a lower operating ratio indicates better profitability, so a year-over-year improvement of 240 bps on the implied 71.9% guide would mark continued margin strength even as costs rise. Whether the company lands within that range will become clear with its third-quarter earnings report, where September tonnage and yield data will round out the quarter.

"We remain confident that through the continued execution of our long-term strategic plan, we are well positioned to win profitable market share and increase shareholder value over the long term," Freeman said.

The company normally outgrows the market by 9 to 10 percentage points in an upcycle.

Old Dominion's August report serves as a key industry bellwether, indicating that LTL carriers are prioritizing pricing discipline and profitability over volume despite only modest demand trends.