The change in base metal stocks on the London Metal Exchange on July 28 was as follows: Copper inventories increased by 1,000 tons, with a total stock of 27,550 tons. Aluminum inventories increased by 7,050 tons, with a total stock of 533,200 tons. Tin inventory decreased by 90 tons, with a total stock of 3,425 tons. Lead inventory decreased by 550 tons and total inventory was 60,150 tons. Zinc stocks fell 575 tons, with a total stock of 583,250 tons. Nickel stocks increased by 36 tons and the total stock was 7,038 tons. Aluminum alloy stocks remained flat with a total stock of 46,300 tons.