Spot rubber finished flat on Friday. RSS 4 quoted steady at ₹131 a kg by traders and the Rubber Board. The grade closed unchanged at ₹128 according to dealers. August futures improved to ₹131 (130.33), September to ₹129.32 (128.89), October to ₹128.00 (127.75) and November to ₹127.74 (127.28) on NMCE. RSS 3 (spot) weakened to ₹116.73 (117.24) at Bangkok. Spot rubber rates (₹/kg) were: RSS-4: 131; RSS-5: 126; ISNR 20: 115 and Latex (60% drc): 82.50.