Spot rubber flared up further on Monday. RSS 4 improved to ₹137 (134) a kg according to traders. The grade finished firm at ₹136.50 ( 133.50) and ₹133.50 (130.50) respectively according to the Rubber Board and dealers. The trend was partially mixed as latex finished flat in an almost inactive trading session. August futures improved to ₹139.75 (137.60), September to ₹140.63 (138.89) and October to ₹138.40 (137.00) on NMCE. RSS 3 (spot) closed at ₹112.54 (110.41) at Bangkok. Spot rubber rates (₹/kg) follow: RSS-4: 137 (134); RSS-5: 135 (132); ISNR 20: 128 (127) and Latex (60% drc): 92 (92).