Natural rubber traded at 19,340 yuan per tonne, down 1.15% on the day, while butadiene rubber held at 16,800, up 0.45%. The spread between the two narrowed to 2,540 yuan per tonne, exposing a mismatch between tire makers' pricing and distributor inventory and reopening room for synthetic blend ratios.

Natural rubber fell 1.5% while butadiene rubber rose 0.67%, narrowing the NR–BR premium to ¥2,920 as tight butadiene turnarounds held BR's floor.

Natural rubber held at 19,865 yuan/t while butadiene rubber fell 2.0% to 15,685 yuan/t; the NR–BR spread widened to 4,180 yuan/t, prompting tire makers to lift synthetic blend and adjust hedges.