Profit booking at higher levels continued to keep the rubber prices under pressure. In spot, RSS 4 declined to ?136 (138) a kg according to traders and the Rubber Board. The grade weakened to ?133 (135) according to dealers. RSS 3 (spot) slid to ?116.34 (117.57) at Bangkok. August futures improved to ?119.36 TOCOM. Spot rubber rates (?/kg) follow: RSS-4: 136 (138); RSS-5: 132 (135); ISNR 20: 127 (129) and Latex (60% drc): 90 (90). Our Correspondent