Spot rubber finished flat in an almost inactive trading session. RSS 4 quoted unchanged at ₹147 a kg by traders and the Rubber Board. The grade closed steady at ₹144 a kg, dealers said. April futures concluded at ₹144.10 (144.11), May at ₹147.81 (148.16) and June at ₹150.75 (150.68) on the NMCE. RSS 3 (spot) fell to ₹151.50 (₹154.13) at Bangkok. Spot rubber rates (₹/kg) were: RSS-4: 147 (147); RSS-5: 139 (139); Ungraded: 125 (125); ISNR 20: 128 (128), Latex (60% drc): 92.50 (92.50).