Pursuant to a written agreement with the existing shareholders, the taxpayer purchased 25% of the shares of a land development corporation for U.S. $5,000 and made an interest-free loan of U.S. $295,000 to the corporation. Because the loan was made as part and parcel of an acquisition of the 25% shareholder interest in the corporation, the loan was made to assist the corporation with its business, and the taxpayer genuinely believed that it was a good development, the ultimate loss realized by the taxpayer was deductible.