In today's rubber panel NR and BR took separate roads. Natural rubber's front month closed at ¥19,150/t, down a mild 0.98%, still inside its range; butadiene rubber closed at ¥14,910/t, off 3.84% on the day — the deepest decline among all 11 quotes.

BR's drop comes from upstream relief. Butadiene, BR's feedstock, saw domestic units restart, and the looser supply pulled the cost base down while BR processing margins actually widened. Tyre makers locked a batch of long contracts at the low, depressing physical premiums further — a loop of cheaper feedstock, more hedging, weaker spot.

NR did not follow, held up by a weather premium on the supply side. Southeast Asian belts entered a rainy-season disruption, arrivals fell short of plan, and bonded-zone stocks kept drawing. On the FX side USD/CNY at 6.7114 lifted the RMB cost of imported rubber and propped the domestic board.

For a hedging operator the divergence is the position itself: a long-NR / short-BR spread widened about 2.86 percentage points today, steadier than betting one side. SNSUC's terminal shows nr/br and the five FX pairs on one screen, so roll-over needs no reconciliation across three systems.