Port of LA's 3-month record is a tariff-and-fuel arbitrage clock — and it's already winding down

Importers raced the calendar. A temporary 10% global tariff under Section 122 took effect in February 2026 and was scheduled to expire on July 24; it was replaced by reciprocal duties of 10% to 12.5% on goods from 60 trading partners covering roughly 99.4% of U.S. import categories, plus sectoral tariffs (50% on steel, aluminum, autos) and forced-labor-related duties that began landing in August. NRF's Jonathan Gold, the trade's most quoted policy voice, said retailers 'stocked up as much as they can ahead of tariff increases,' with the July 2026 forecast at 2.47 million TEU — a new all-time monthly record. That record happened because the front-loading pulled future volumes into the present, not because U.S. consumers bought more.

The fuel clock layered onto the tariff clock. The U.S.–Iran war drove diesel to an all-time national average of $5.85/gallon by September 4, 2026, with jet fuel in North America up roughly 95% since the war began, per Al Jazeera and NYT reporting. Two states now average over $7/gallon diesel. For importers, this meant the cost of pulling Q4 inventory forward into Q2/Q3 was rising as fast as the tariff savings: peak-season surcharges of $200–$800 per FEU on east-west lanes compounded with ground fuel surcharges that FedEx raised from 26.5% in April to 41.50% on August 21 — a 56% jump in surcharge rate that flows directly to carrier revenue.

The arbitrage had two layers of winners. Layer one is the retailers who already had inventory in transit: they locked in pre-tariff prices and now sit on a Q4 cost-of-goods advantage. Layer two is the freight carriers who physically moved the surge. The two layers don't share the same calendar — retail gains show up in Q3/Q4 margins, freight gains in Q2/Q3 — and that's the asymmetry that drives the trade.

J.B. Hunt is the cleanest read on the front-loading: intermodal — rail-based long-haul that depends on West Coast import volumes — grew revenue 22% YoY with revenue per load up 11% and Eastern network loads up 16%, exactly the pattern when containers bound for inland distribution centers pour through the LA/Long Beach complex. FedEx called out that fuel surcharges alone contributed 5 percentage points of Q4 revenue growth — meaning roughly $1.25B of its $25.01B quarterly top line is pass-through fuel cost, not volume. United Parcel Service saw US SMB average daily volume grow 4.3% (now 34.5% of mix) even as International volume dropped 5.8% — the export side already feels the tariff drag.

The retailer layer is where the arbitrage converted into reported earnings. Walmart (Q2 FY27, reported August 20, 2026) collected nearly $2.9B in IEEPA tariff refunds — money it had already paid on imported goods that the Supreme Court's February 2026 ruling invalidated — and used a chunk of it to roll back prices on more than 11,000 items. Net sales grew 5.9%, adjusted operating income grew 17.4% in constant currency, and the company raised full-year FY27 guidance to 4.0–5.0% sales growth and 7.0–8.5% adjusted operating income growth.

Target (Q2 2026, reported August 19) was even more concentrated: $994 million of pre-tax tariff refund benefits in a single quarter, which added $1.65 to GAAP and adjusted EPS of $4.11 — the EPS doubled year-over-year, but ex-refunds it was a more modest +20%. Net sales rose 5.3%, comparable sales +3.8%, digital comp +8.7% led by >25% same-day delivery growth. The pattern: inventory imported before the August tariffs at lower cost lands now, while refund cash flows hit gross margin.

The U.S. goods-and-services trade deficit widened to $88.6 billion in July 2026 — the largest gap since March 2025, per the BEA/Census September 3 release. Imports hit $399.3B (+2.8% MoM, +1.9% in the BEA measure), with capital goods imports jumping $14.4B to a record high and goods imports alone reaching $320.6B (+3.7%). The three-month moving average deficit climbed to $78.5B, up $11.9B. Year-to-date, the deficit is actually $188.4B smaller than 2025 — but that gap narrows every month the front-loading continues, and reverses the moment September imports fall 5.7% YoY as NRF forecasts.

The mechanical implication: the same trade-deficit print that signals 'import surge' today will invert into 'import collapse' prints starting with the September BEA release (early November). Analysts who anchor on the July surge to extrapolate freight demand, retail restocking, or dollar strength are reading a lagging indicator. The leading indicator — NRF's monthly tracker — already shows the cliff.

Days-to-quarters (Q4 2026 / Q1 2027): The NRF forecast takes U.S. container imports to 1.99M TEU in September (-5.7%), 1.99M in October (-13.2%), and 1.92M in November (-5.2%). For J.B. Hunt, that means intermodal volumes and revenue-per-load — both up double-digits now — face the toughest YoY comparison in the company's history through Q4. For United Parcel Service and FedEx, the fuel-surcharge revenue tailwind inverts: as diesel eases from its $5.85 peak (assuming the Iran ceasefire holds), surcharge revenue drops mechanically even if volumes hold. For ocean carriers Maersk and Hapag-Lloyd, Drewry's World Container Index at $4,465/40ft on September 3 has further to fall as transpacific volumes roll over — Hapag-Lloyd already reported a EUR 18M EBIT loss in its container shipping segment for H1.

One-to-three years (2027–2028): The structural damage is in retail inventory math. Goods imported before August's new 10–12.5% duty carry an indefinite cost advantage versus goods imported after. Retailers who loaded warehouses in June–August will price into Q4 2026 holiday and into 2027 to clear that inventory — which limits how fast they can pass tariff costs through to consumers, but also means replenishment in 2027 will hit higher-cost goods and compress gross margins. The IEEPA refund windfall is a one-time event; the replacement inventory cycle is a multi-quarter headwind. For carriers and ports, that argues for capacity rationalization rather than a return to 2022-vintage pricing. The base case is that 2027 U.S. container imports grow 0–2% — well below the 2.4–3.0M TEU monthly peak reached this summer.