Spot rubber continued to rule steady on Wednesday. RSS 4 finished unchanged at ₹144 a kg, according to traders. The grade quoted flat at ₹143 and ₹140 respectively by the Rubber Board and dealers. August futures firmed up to ₹140.85 (₹139.68), September to ₹135.60 (₹134.58) and October to ₹131 (₹130.27) on the National Multi Commodity Exchange. RSS 3 (spot) weakened to ₹124.46 (₹127.43) at Bangkok. August futures improved to ¥182.6 (₹116.18) on the Tokyo Commodity Exchange. Spot rubber rates (₹/kg): RSS-4: 144 (144); RSS-5: 141 (141); Ungraded: 116 (116); ISNR 20: 121 (121) and Latex (60% drc): 90 (90).