Spot rubber continued to rule unchanged on Wednesday. RSS 4 finished flat at ₹140 a kg, according to traders and the Rubber Board. The grade was quoted steady at ₹137 by dealers. July futures closed at ₹139 (₹139.06), August at ₹136.08 (₹135.94), September at ₹129.55 (₹129.35) on the National Multi Commodity Exchange. RSS 3 (spot) firmed up to ₹108.23 (₹108.23) at Bangkok. July futures improved to ¥171.6 (₹109.87) on the Tokyo Commodity Exchange. Spot rubber rates (₹/kg): RSS-4: 140 (140); RSS-5: 136 (136); Ungraded: 110 (110); ISNR 20: 118 (118) and Latex (60% drc): 96 (96).