Jesús Huerta de Soto argues that the ordinary demand deposit hides a legal contradiction. Repeated across a banking system, that contradiction drives the recurring boom and bust of modern economies. He brings contract law and bank accounting into contact with Austrian capital theory, then closes with a detailed reform program. The fourth English edition (Mises Institute, 2020) is Melinda A. Stroup's translation of a Spanish original first issued in 1998. It is long and openly partisan. The length pays off for readers who want one argument carried from deposit law through the bank ledger to the real economy.
The opening chapter rests on two contracts. A loan transfers the use of money for a term, and interest pays for that transfer. An irregular deposit of fungible goods such as grain or money gives the depositor a standing right to withdraw an equal quantity and quality on demand. Roman law called that equivalent the tantundem. The depositary may pool units and return different notes, provided the equivalent amount stays available. From that safekeeping purpose the author derives a full-reserve obligation for demand deposits. Custody fees suit the contract; interest paid to depositors signals, on his reading, that their money is being lent.
Chapter four turns the legal claim into ledger entries, the book's most portable section. With hypothetical balance sheets for one bank and then for a system, the author shows that a loan granted against demand deposits appears at once as a new asset and a matching deposit liability. The books balance and fresh purchasing power circulates while the stock of physical goods stays put. Repayment extinguishes deposits. Default differs: the bank books a loss while deposit liabilities remain, so other depositors' claims still stand. Expansion slows when the public keeps cash outside banks or banks hold voluntary excess reserves. A shortage of creditworthy borrowers restrains it too.
Capital theory arrives in chapter five through avowedly hypothetical models, from Crusoe to an economy whose saving jumps to a quarter of net income. Under the author's assumptions, a longer process can yield more. Starting one takes real saving, since consumer goods and other completion resources must carry workers and suppliers until the capital goods are finished. He allows an exception: a footnote grants that new technology can raise productivity while shortening production, even absent net saving. In his model, saving shifts relative prices between consumer goods and earlier stages and draws factors toward longer projects. Another footnote holds that the cycle argument survives other theories of interest, including marginal productivity. Readers who reject his pure time-preference view can still test the mechanism.
Credit expansion, on the author's account, imitates saving without supplying it. New money enters through loans and lowers the loan rate relative to the rate that would have prevailed absent expansion. Because a nominal rate can rise and still sit below that counterfactual, he says each episode needs historical interpretation. The lower rate lifts the present value of capital goods, and entrepreneurs begin longer projects although consumers' saving is unchanged. Competition for factors then raises their costs. Later, consumer-goods prices climb faster than the incomes of original factors. Firms close to consumption gain profitability relative to remote stages, where higher factor costs and a climbing loan rate squeeze the projects. He reads the recession as the liquidation of those errors.
A full section answers the modern fractional-reserve free banking of George Selgin and Lawrence White, along with Steven Horwitz. In their theory, competing banks expand issue when the public wants to hold more money, accommodating that demand. Huerta de Soto replies that a demand to hold money differs from a demand to borrow, while new bank money enters circulation through loans. He adds that issue feeds back on itself through adjustment lags and relative-price shifts, though he grants that interbank clearing curbs expansion earlier than a central bank would. On our reading, a person seeking a larger cash balance may consume less, which counts as saving. He may instead sell investments, building the balance through disinvestment that supplies no new saving. Higher consumption works the other way, drawing cash down. That weakens one free-banking inference and leaves the wider dispute open. Lower historical failure rates under free banking measure a different outcome from a real boom and bust, and causal readings of those episodes remain contested.
His legal conclusions run narrower than his rhetoric. He states that fractional-reserve banking is lawful under positive law and rules out criminal fraud for people acting within today's system. His charge is that the contract is defective under general legal principles. Voluntary contracts with contingent redemption draw no objection in principle. He objects when the public still treats such claims as perfect money substitutes, because he believes the resulting cycles harm third parties. Informed consent is thus necessary and, for him, insufficient. That third-party premise carries the weight, and his introduction concedes deep disagreement among libertarian theorists over banking rules.
Under the reform, citizens would choose their money, beginning with an initial conversion to pure gold. The central bank would be abolished and entry into banking opened. Statute would hold demand deposits at full reserve. Lending would then draw on time deposits and mutual-fund shares whose market value can fall, so investors who accepted that risk bear defaults and entrepreneurial error. The author concedes that wars or natural disasters that shake confidence would still cause crises; his claim covers the recurrent credit-driven cycles. Gold is his initial choice, and he allows that markets may later settle on another standard.
The five-stage transition raises the hardest questions. A temporary central bank would print new base money once to back existing demand deposits under a permanent full-reserve mandate. Banks' old loans would pass into mutual funds whose shares are exchanged for public debt, leaving bank equity intact. If state pension liabilities were first converted into bonds, they could join that exchange alongside or in place of treasury bonds. The design moves assets and risk between holders and retires public debt only by handing bondholders an asset in return. Those who trade fixed claims for fund shares accept a different value and risk profile, even at market prices. Enforcement and the classification of claims under modern bank law get little attention.
Read it to test one question: what follows for the business cycle if a demand deposit is a custody contract? The book suits a patient reader who already handles contract law and balance sheets; its capital theory asks for sustained work. Advocates of full reserves will find their case built as one structure, and opponents will meet it at full strength. It is neither a neutral banking textbook nor investment guidance, and the prefaces' claims of forecasting success are the author's interpretation. The Mises Institute publishes the fourth edition under the author's 2020 copyright, with all rights reserved: fourth edition PDF from the Mises Institute.