Synthetic rubber weakened across the board: butadiene rubber (BR) -3.84% and natural rubber (NR) -0.98%, with the gap between them widening. BR is squeezed by falling butadiene feedstock and tire-plant run cuts; NR only dipped on slower port-inventory draw. The widening spread flags a split in downstream restocking cadence.

China's spot natural rubber was quoted near ¥17,791/t on 27 August, up 7.94% from ¥16,483/t at the start of the month; front-month screens this morning show natural rubber at ¥18,905/t (+0.51%) and butadiene rubber at ¥14,435/t (+0.31%). Thai cup lump holds at a high THB 70/kg and Qingdao bonded plus general-trade inventories have drawn down to 631,500 t, yet tyre operating rates sit at 64.15% for truck and bus radials and 65.81% for passenger radials (the latter down 6.06% year on year) with finished-goods stocks still elevated. NOAA puts the probability of a strong El Nino in October-December at 81%, leaving a textbook 'strong expectations, weak reality' market.