Butadiene rubber fell 1.36% to CNY 14,505/t as domestic butadiene units lifted run rates and eased the cost base, while natural rubber gained 0.24%. The widening gap restores butadiene rubber's cost edge in tire compounds, and buyers should rerun their blend ratios.

Butadiene rubber fell 3.84% to CNY 14,910/t — its steepest one-day drop in 3 months. Oversupplied butadiene feedstock and slower EV tire replacement cycles weakened downstream restocking appetite.

Butadiene Rubber (BR) and Styrene-Butadiene Rubber (SBR) are driven by butadiene cost and the NR price ratio; the synthetic/natural blend in tyre recipes swings with the spread. SNSUC lists NR and SR together for price comparison.