Transfer redefined to include sale, extinguishment, compulsory acquisition and conversion to stock in trade, expanding capital asset scope. The amendment substitutes the statutory definition of transfer to include sale, exchange or relinquishment of a capital asset; extinguishment of any rights in the asset; compulsory acquisition under any law; and conversion of the asset by the owner into, or treatment of the asset as, stock in trade of a business, with such conversion or treatment treated as a transfer.