Spot rubber prices made further gains mainly on covering purchases at lower levels. RSS 4 improved to ₹142 (₹141) a kg, as quoted by the traders. The grade closed firm at ₹141 (₹140) and ₹138 (₹137) respectively, according to the Rubber Board and dealers. January futures concluded at ₹140.95 (₹140.74), February at ₹147.60 (₹147.16), March at ₹151.51 (₹151), April at ₹159.25 (₹157.85) on the National Multi Commodity Exchange. RSS 3 (spot) flared up to ₹164.50 (₹161.72) at Bangkok. January futures increased to ¥283.7 (₹166.98) on the Tokyo Commodity Exchange. Spot rubber (₹/kg): RSS-4: 142 (141); RSS-5: 134 (132); Ungraded: 121 (119); ISNR 20: 130 (129) and Latex (60% drc): 85 (84).