Spot rubber closed unchanged on Monday. RSS 4 finished flat at ₹122 a kg, according to traders. The grade improved to ₹122 (₹121.50) and ₹119 (₹118.50) respectively, according to the Rubber Board and the dealers. October futures declined to ₹120.45 (₹123.78), November to ₹120.58 (₹123.74), December to ₹120.61 (₹123.99) and January to ₹122.01 (₹123.78) while the February futures firmed up to ₹124.50 (₹124.01)on the National Multi Commodity Exchange. RSS 3 (spot) dropped to ₹110.91 (₹111.76)at Bangkok. October futures weakened to ¥172.2 (₹114.31) on the Tokyo Commodity Exchange. Spot rubber rates ₹/kg were: RSS-4: 122 (122); RSS-5: 117 (117); Ungraded: 102 (102); ISNR 20: 99 (99) and Latex (60% drc): 77 (77).