Spot rubber strengthened further as the market improved mainly on covering purchases at lower levels expecting fresh enquiries from the tyre sector. RSS 4 closed firm at ₹111 (109) a kg, according to traders. The grade increased to ₹110 (108.50) and ₹107 (105.50) respectively as reported by the Rubber Board and dealers. The trend was partially mixed. RSS 3 (spot) flared up to ₹99.67 (96.88) a kg at Bangkok. March futures dropped to ¥162.8 (₹97.23) on the Tokyo Commodity Exchange. Spot rubber rates (₹/kg): RSS-4: 111 (109); RSS-5: 108 (106.50); Ungraded: 105 (103); ISNR 20: 104.50 (103.50) and Latex (60% drc): 78.50 (78.50).