Spot rubber closed almost unchanged on Tuesday. RSS 4 was quoted steady at ₹112.50 a kg, according to traders and the Rubber Board. The grade finished flat at ₹109.50, according to dealers. The trend was partially mixed as RSS 5 improved marginally on enquiries from the non-tyre sector. October futures concluded at ₹114.25 (₹114.25), November at ₹113.70 (₹113.92), December at ₹114.05 (₹114.53) on the National Multi Commodity Exchange. October futures closed at ¥153.9 (₹84.67) on the Tokyo Commodity Exchange. Spot rubber rates (₹/kg): RSS-4: 112.50 (112.50); RSS-5: 110.50 (109.50); Ungraded: 99 (99); ISNR 20: 99.50 (99.50) and Latex (60% drc): 82.50 (82.50).