Spot rubber weakened in the absence of genuine buyers on Thursday. RSS 4 dropped to ₹116 (117) a kg as quoted by the traders. The grade slid to ₹116 (116.50) and ₹113 (113.50) respectively, according to Rubber Board and the dealers. November futures declined to ₹117.10 (118.23), December to ₹119.90 (121.06), January to ₹122.95 (123.91) and February to ₹125.10 (126.79) a kg on National Multi Commodity Exchange. RSS 3 (spot) weakened to ₹114.67 (115.30) a kg at Bangkok. Spot rubber rates (₹/kg): RSS-4: 116 (117); RSS-5: 111(111.50); Ungraded: 101 (103); ISNR 20: 101 (101) and Latex (60% drc): 72 (72).