Fuel oil futures surged 4.23% to ¥4,661/t, signaling acute tankage stress in East China; with average bonded warehouse turnover at 1.8x/month, usable capacity has fallen below the 72% warning threshold. Demurrage fees hit ¥3,650/day — up 28% vs. Sep avg. Asphalt’s -1.57% move confirms deteriorating regional arbitrage economics.