Today's tape shows a strong downstream and a limp crude follow-through. Brent is up only 0.77%, yet fuel oil printed ¥4,363 a tonne, +6% on the day, bitumen at ¥5,256, +5.35%, butadiene rubber at ¥15,680, +5.73%, and even natural rubber lifted to ¥19,600, +2.51%.

That structure repairs margins for refiners. The fuel oil and bitumen moves have blown the crack spread open, and independent refiners' processing margins are visibly healing. The rubber side runs on a different engine — butadiene rubber is outpacing natural rubber on feedstock butadiene tightness and plant maintenance, so the supply constraint in synthetic rubber is the story.

On the book: fuel oil and bitumen longs are holdable, but do not chase a +6% single-day candle — wait for a pullback to the 5-day line before adding; the butadiene-over-natural-rubber spread is a pair to run while watching CFR butadiene offers; and because downstream is sprinting while crude lags, this is demand and maintenance pricing, not cost-push, so keep the positions short and fast.