Spot rubber closed unchanged on Tuesday. RSS 4 quoted steady at ₹144 a kg by traders. The grade weakened to ₹143 (₹143.50) and ₹140 (140.50) respectively, according to the Rubber Board and dealers. August futures dropped to ₹139.97 (₹140.86), September to ₹134.50 (₹136.04) and October to ₹130.50 (₹132.59) on the National Multi Commodity Exchange. RSS 3 (spot) declined to ₹127.43 (₹131.48) at Bangkok. August futures weakened to ¥177.1 (₹114.26) 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).