USGC crude exports have zero price responsiveness: Panama Canal AIS visibility at 11 vessels/day—below 30-day avg of 12.17—but this reflects signal visibility only, not trade volume change. What anchors export floor is the 3.55M bpd gap between US refinery input (17.4M bpd) and domestic output (13.85M bpd) per JODI (2026-08); combined with 6.709M bpd imports, it confirms refineries must continuously source external crude—exports cannot yield quota. Yucatán Strait’s 29 vessels/day (historical norm 23) is irrelevant—it’s dominated by short-haul Gulf-to-US East Coast/Caribbean traffic, not USGC export diversion. Supply: US crude imports at 6.709M bpd are a rigid fill for 17.4M bpd refinery input—not a discretionary variable. Canada imports just 606K bpd; its refinery input (1.286M bpd) vs. output (4.461M bpd) confirms net exporter status—no sourcing competition for USGC. Demand: US distillate stocks total 591,678K bbl (2026-08), gasoline 157,374K bbl, diesel 79,896K bbl—seasonally elevated, capping further refinery run rate gains. Yet 17.4M bpd is near physical equipment ceiling, making import rigidity irreversible. Inventory: US crude ending stocks at 565,444K bbl ≈ 32.5 days of static demand—above IEA’s 30-day safety threshold—but this is national aggregate, excluding USGC dedicated export tanks, now squeezed by incoming feedstock, delaying export loading schedules. USGC-local reality: Unlike integrated hubs (e.g., Rotterdam or Fujairah), USGC operates as a three-stage node—import → process → re-export. Exports comprise two streams: direct re-export of imported crudes (e.g., ESPO, Urals), and light fractions (e.g., naphtha, LPG) exported post-distillation. Current WTI-Brent spread of $5.79/bbl (92.33–86.54) sits below breakeven arbitrage window ($7.61/bbl, per prior report), yet USGC exports remain pressured—proof that scheduling is locked to refinery logistics, not spreads. For SNSUC clients, USGC cargo booking has shifted from ‘spread-triggered’ to ‘berth-release-driven’; T+2 discharge-inspect-transfer cycles are collapsing. Upside trigger: Panama AIS vessels/day <10 for 5 consecutive days + WTI-Brent spread ≥ $8.20/bbl forces rerouting to Cape of Good Hope (current 18 vessels/day, +50% vs. historical norm 12), lengthening USGC load times and lifting FOB premiums. Downside trigger: US refinery input drops below 17.0M bpd in one month, or domestic output breaches 14.2M bpd—directly compressing import rigidity and freeing export elasticity. Stance: bearish—zero export elasticity = zero pricing power; WTI cannot rally independently. Flip to neutral if WTI breaks $85.00/bbl or US crude imports fall below 6.5M bpd. Action for SNSUC clients: ① Close USGC crude price-fixing window—pause all bids; ② Lock USD/CAD (1.4126) 72h pre-loading for booked vessels to hedge CAD appreciation; ③ Prioritize USGC naphtha co-products for Asia fuel oil transshipments—avoid main port congestion; ④ Watch condition: US refinery input <17.2M bpd for two consecutive weeks OR Panama AIS vessels/day ≥13 for 3 days.