Brent and WTI fell together in the overnight session, each losing more than 6% — the sharpest single-session drop in roughly a month. Brent settled at $105.06/bbl and WTI at $96.87/bbl, pulling the transatlantic spread from the $9.30 area earlier this month to $8.19.

A tighter spread does not mean both legs weakened equally. WTI fell further, which widens the discount of US Gulf Coast light crude versus Brent. For short-haul light-sweet grades priced off Brent — ESPO, Dubai, Oman — their delivered quotes now face added pressure against US Gulf cargoes.

The yuan provided a cushion. Dollar-yuan slipped from around 6.7598 to 6.6486. At the live rate, the RMB-delivered cost of Brent falls from roughly 760 yuan/bbl to about 698 yuan/bbl, a saving of more than 60 yuan per barrel. For refiners and transshipment buyers who settle in RMB, the currency move amplifies the crude-side decline.

Lower delivered cost reshuffles feedstock economics. Deals that were stranded by the earlier currency depreciation now clear the math again. The delivered-value ranking of short-haul light-sweet grades against long-haul US Gulf cargoes swings on both spread and exchange rate, so trading desks must re-run the delivered netback every day rather than lean on a fixed formula.

The selloff also pushes refining margins to a sensitive level. Crude fell faster than products, which in theory opens the crack. But bitumen and fuel oil tracked crude lower, so the heavy end showed no independent strength — this move is macro risk pricing, not a product-specific crack story.