Spot rubber closed unchanged on Thursday. RSS 4 finished flat at ₹124.50 a kg, according to traders and the Rubber Board. February futures weakened to ₹122.66 (123.75) on the Indian Commodity Exchange. RSS 3 (spot) declined to ₹115.44 (116.68) at Bangkok.Spot rubber rates (₹/kg): RSS-4: 124.50 (124.50); RSS-5: 120 (120); ISNR 20: 117 (117) and Latex (60% drc): 87 (87).