Tennessee supply chain professor breaks down price impacts of Iran war

Gas prices in Tennessee are up about $0.42 statewide and have topped $3.00/gal for the first time since 2024 after the U.S./Israel attack on Iran and closure of the Strait of Hormuz, pushing oil prices higher. University of Tennessee supply-chain professor notes fuel is roughly 25% of truck operating costs, so higher fuel could pass through to grocery prices and disproportionately hurt low- and middle-income East Tennesseans over the next 3–4 months; longer-term shifts toward domestic drilling or alternative energy are discussed as mitigation.

Analysis

This is a classic transportation-cost shock with asymmetric pass‑through and clear winners among firms that either control logistics or internalize energy costs. Retail shelf prices do not adjust immediately; wholesalers and grocers will absorb margin compression for one to three quarters before full passthrough, creating a temporary hit to margins that is largest for thin‑margin, highly localized operators.

Modal substitution is the most important second‑order effect: sustained higher road fuel will accelerate freight migration to rail and ocean (where possible), magnifying the advantage of asset‑heavy railroads and intermodal integrators that can scale without linear increases in fuel spend. Conversely, spot‑priced trucking firms and airlines face concentrated downside as fuel is a higher share of their marginal cost and hedging tends to lag market moves.

On the policy and macro side, even a transitory supply shock increases upside risks to headline and goods inflation for the next 2–4 quarters, raising the probability of a Fed that stays hawkish longer. That outcome favors companies with strong free cash flow and low inventory sensitivity, accelerates capex into fuel‑saving or alternative energy projects (multi‑year tailwind), and makes short‑dated volatility trades around the geopolitical news cycle attractive.

Key Decisions for Investors

• Long UNP or NSC (railroads) — 6–12 month horizon. Buy UNP (or NSC) stock as a hedge against sustained truck-to-rail modal shift; target +15–25% upside if spreads widen, stop-loss -12%. Low correlation to airlines limits portfolio drawdown.
• Buy PSX (refiner) 6–9 month call spread (e.g., buy 1x PSX 9-month $95 call / sell $110 call) — captures widening crack spreads while capping premium. Expect 20–40% upside to spread value if crude stays elevated; max loss = net premium (~3–5% of notional).
• Short airlines (AAL/DAL) via 3‑month puts or buying cheap downside protection — tactical 1–3 month trade around headline risk. Premiums are inexpensive relative to directional risk; a sustained fuel spike or demand softening can produce 30%+ downside in equities, while premium cost caps loss.
• Pair trade: long WMT (or KR) / short regional grocer (small cap) — 3–9 months. Large-scale retailers with embedded logistics and purchasing power will protect margins better; target pair IRR ~2–1 reward/risk (20% vs 10%) if inflation persists and smaller grocers cut promotions.