Spot rubber showed a mixed trend on Friday. RSS 4 quoted steady at ₹140 a kg . The grade unchanged at ₹139 and ₹136 respectively, according to the Rubber Board. January futures concluded at ₹137.75 (₹138.03), February at ₹143.75 (₹143.11), March at ₹147.50 (₹146.63)on the NMCE. January futures weakened to ¥271 (159.07) on the Tokyo Commodity Exchange. Spot rubber rates (₹/kg): RSS-4: 140 (140); RSS-5: 131 (130); Ungraded: 119 (118); ISNR 20: 128 (128) and Latex (60% drc): 84 (84).