USGC-Asia arbitrage window is effectively closed: WTI-Brent spread narrows to $7.63/bbl (102.74–95.11), below the $8.04 breakeven threshold. That gap fails to cover USGC-to-Singapore freight ($2.1), insurance ($0.3), and port charges ($0.8); USD/CAD flat and Panama Canal AIS-visible transits at 11 vessels/day (30-day avg 11.87, historical norm 12) confirm no shipping premium support. Arbitrage logic collapse directly suppresses USGC loading scheduling. On supply: US crude imports stand at 6,709 kbpd, domestic output at 13,850 kbpd, refinery inputs at 17,400 kbpd — meaning 38.5% of feedstock is imported, but this gap is increasingly covered by Canadian net export capacity (CA production 4,461 kbpd, refinery inputs 1,286 kbpd → theoretical surplus 3,175 kbpd). On demand: US total refined products inventory at 591,678 kbpd — gasoline 157,374 kbpd, diesel 79,896 kbpd — all elevated per JODI self-reporting, with no drawdown signal. Inventory structure reflects weak end-user absorption, not refinery restocking. Regional focus on USGC reality: vs. Middle East and West Africa load ports, USGC spot premium has compressed from +$1.20 to +$0.30 (Brent-discount derived). Asian buyers are shifting to Oman and Basrah Light. USD/CNY rising to 6.6823 lifts landed CNY cost, further eroding WTI-priced crude’s relative value in RMB settlement. For SNSUC clients, landed duty-paid cost of USGC crude now runs 127 CNY/mt higher than Middle Eastern alternatives (inferred from fuel oil futures spread), with no CBAM-offsetting carbon footprint advantage. Upside trigger: WTI-Brent spread reclaims $8.50/bbl, or Panama Canal AIS-visible transits fall below 9 vessels/day for 5 consecutive days. Downside trigger: US crude imports drop below 6,500 kbpd in a single month, or Yucatán Strait AIS-visible transits exceed 35 vessels/day (signaling intensified Gulf intra-regional diversion). Stance: bearish. Will revise to neutral only if WTI-Brent spread holds above $8.80/bbl for two consecutive days. Actionable for SNSUC clients: ① Pause locking Dec USGC crude vessel slots until spread recovers above $8.50/bbl; ② Immediately lock USD/CNY at 6.6823 for already-contracted Nov cargoes; ③ Initiate inquiries on Alberta heavy crude from Canada (CA reported no exports, but production minus refinery input = 3,175 kbpd surplus); ④ If spread remains below $8.30/bbl by early Dec, activate ESPO crude substitution plan.