Spot rubber prices were unchanged on Wednesday. RSS 4 quoted steady at ₹130 a kg by traders. The grade finished flat at ₹129 and ₹126 respectively, according to the Rubber Board and dealers. December futures improved to ₹132.45 (₹131.02), January to ₹134.82 (₹133.53) and February to ₹137.96 (₹136.78) on the National Multi Commodity Exchange. RSS 3 (spot) firmed up to ₹136.41 (₹136.16) at Bangkok. Spot rubber rates (₹/kg): RSS-4: 130 (130); RSS-5: 126 (126); Ungraded: 115 (115); ISNR 20: 118 (118) and Latex (60% drc): 77 (77).