Spot rubber regained strength following covering purchases at lower levels . RSS 4 improved to ₹126 (124.50) a kg on according to traders. The grade firmed up to ₹125.50 (125) and ₹122.50 (122) respectively according to the Rubber Board and dealers. December futures weakened to ₹125.40 (125.88), January to ₹126.11 (126.50) and February to ₹128.20 (128.52) on NMCE. RSS 3 (spot) firmed up to ₹100.64 (100.23)at Bangkok. Spot rubber rates (₹/kg) follow: RSS-4: 126 (124.50); RSS-5: 122.50 (121.50); ISNR 20: 106.50 (106) and Latex (60% drc): 82.50 (82).