Copper inventories in the domestic bonded zones increased 4,300 mt from April 18 to 77,700 mt as of Thursday April 25, according to the latest SMM survey. Copper inventories in the Shanghai bonded zone added 4,500 mt to 73,400 mt, and inventories in the Guangdong bonded zone dipped 200 mt to 4,300 mt. Except for some customers who purchased warehouse warrants in small quantities due to arbitrage factor, the overall market demand was weak. In addition, domestic copper smelters will also deliver their cargoes to the Shanghai International Energy Exchange (INE), and bonded inventories will continue to accumulate.