During the 1945-1946 Hungarian hyperinflation, when the rate of inflation reached 41.9 quadrillion percent per month, the Hungarian government discovered that the real value of its tax receipts was falling dramatically. To keep real tax revenues more stable, it created a good called a "tax pengö," in which all bank deposits were denominated for purposes of taxation. Nevertheless, payments for goods and services were made only in terms of the regular Hungarian currency, whose value tended to fall rapidly even though the value of a tax pengö remained stable. Prices were also quoted only in terms of the regular currency. Lenders, however, began denominating loan payments in terms of tax pengös. In what ways did the tax pengö function as money in Hungary in 1945 and 1946?