Industry WIKI

Actuarial science is the discipline that applies mathematical and statistical methods to assess risk in insurance, pension, finance, investment, psychology, medicine, and other industries and professions.

Altreva Adaptive Modeler is a software application for creating agent-based financial market simulation models for the purpose of forecasting prices of real world market traded stocks or other securities. The technology it uses is based on the theory of agent-based computational economics (ACE), the computational study of economic processes modeled as dynamic systems of interacting heter

An asset-backed security (ABS) is a security whose income payments, and hence value, are derived from and collateralized (or "backed") by a specified pool of underlying assets.

An automated fare collection (AFC) system is the collection of components that automate the ticketing system of a public transportation network – an automated version of manual fare collection. An AFC system is usually the basis for integrated ticketing.

Avalanche is a public blockchain and smart-contract platform launched in September 2020 by the American company Ava Labs. The platform's native cryptocurrency is AVAX.

The Avignon Exchange was one of the first foreign exchange markets in history, established in the Comtat Venaissin during the Avignon Papacy. The Exchange was composed of the agents (factores) of the great Italian banking-houses, who acted as money-changers as well as financial intermediaries between the Apostolic Camera and its debtors and creditors. The most prosperous quarter of the c

Backwardation is a market condition where the price of a commodity's forward or futures contract price is trading below the spot price.

Balance of trade is the difference between the monetary value of a nation's exports and imports of goods over a certain time period. Sometimes, trade in services is also included in the balance of trade but the official IMF definition only considers goods. The balance of trade measures a flow variable of exports and imports over a given period of time. The notion of the balance of trade

Basel III is a framework published by the Basel Committee on Banking Supervision (BCBS) in response to the deficiencies in financial regulation revealed by the 2008 financial crisis. It sets international standards and recommendations for bank capital requirements, stress tests, liquidity regulations, and leverage, with the goal of mitigating the risk of bank runs and bank failures. Base

The bond market (also debt market or credit market) is a financial market in which participants can issue new debt, known as the primary market, or buy and sell debt securities, known as the secondary market. This is usually in the form of bonds, but it may include notes, bills, and so on for public and private expenditures. The bond market has largely been dominated by the United States

Børsen (Danish for "the bourse" or "the stock exchange") is a 17th-century commodity bourse and later stock exchange in the centre of Copenhagen, Denmark. The historic building is situated next to Christiansborg Palace, the seat of the Danish Parliament, on the island of Slotsholmen.

A bucket shop is a business that allows gambling based on the prices of stocks or commodities. A 1906 U.S. Supreme Court ruling defined a bucket shop as "an establishment, nominally for the transaction of a stock exchange business, or business of similar character, but really for the registration of bets, or wagers, usually for small amounts, on the rise or fall of the prices of stocks,

The Buffett indicator (or the Buffett metric, or the Market capitalization-to-GDP ratio) is a valuation multiple used to assess how expensive or cheap the aggregate stock market is at a given point in time. It was proposed as a metric by investor Warren Buffett in 2001, who called it "probably the best single measure of where valuations stand at any given moment", and its modern form co

Business intelligence (BI) consists of strategies, methodologies, and technologies used by enterprises for data analysis and management of business information to inform business strategies and business operations. Common functions of BI technologies include reporting, online analytical processing, analytics, dashboard development, data mining, process mining, complex event processing, b

In finance, a buyout is an investment transaction by which the ownership equity, or a controlling interest of a company, or a majority share of the capital stock of the company is acquired. The acquirer thereby "buys out" the present equity holders of the target company. Shareholder activism can result in buyouts. A buyout will often include the purchasing of the target company's outstan

A calendar effect (or calendar anomaly) is the difference in behavior of a system that is related to the calendar such as the day of the week, time of the month, time of the year, time within the U.S. presidential cycle, or decade within the century. It is most often used in a financial context to describe a market anomaly; traders may use market timing to profit from moves in stock pric

Capital management refers to the area of financial management that deals with capital assets, which are assets that have value as a function of economic production, or otherwise are of utility to other economic assets. Capital management can broadly be divided into two classes:

A capital market is a financial market in which long-term debt (over a year) or equity-backed securities are bought and sold, in contrast to a money market where short-term debt is bought and sold. Capital markets channel the wealth of savers to those who can put it to long-term productive use, such as companies or governments making long-term investments. Financial regulators like the B

Capitalization rate (or "cap rate") is a real estate valuation measure used to compare different real estate investments. Although there are many variations, the cap rate is generally calculated as the ratio between the annual rental income produced by a real estate asset to its current market value. Most variations depend on the definition of the annual rental income and whether it is

A cascading failure is a failure in a system of interconnected parts in which the failure of one or few parts leads to the failure of other parts, growing progressively as a result of positive feedback. This can occur when a single part fails, increasing the probability that other portions of the system fail. Such a failure may happen in many types of systems, including power transmissio

In management accounting, the cash conversion cycle (CCC) measures how long a firm will be deprived of cash if it increases its investment in inventory in order to expand customer sales. It is thus a measure of the liquidity risk entailed by growth. However, shortening the CCC creates its own risks: while a firm could even achieve a negative CCC by collecting from customers before paying

Cash return on capital invested (CROCI) is an advanced measure of corporate profitability, originally developed by Deutsche Bank's equity research department in 1996 (it now sits within DWS Group). This measure compares a post-tax, pre-interest cash flow to the gross level of capital invested and is a useful measure of a company’s ability to generate cash returns on its investments.

Cathedraticum (a Latin word from cathedra, episcopal seat or throne) is a specified sum of money to be paid annually toward a bishop. It is a mark of honour and a sign of subjection to the cathedral church, from which its name is derived.

CDS Global, Inc. is a multinational corporation based in Des Moines, Iowa, that provides business process outsourcing and customer data management to various industries worldwide.

Central bank independence refers to the degree of autonomy and freedom a central bank has in conducting its monetary policy and managing the financial system and inflation targeting. The purpose of central bank independence is to maintain price stability, enhance the effectiveness of monetary policy, and ensure the stability of the financial system. Independent central banks have more cr

A central business district (CBD) is the commercial and business center of a city. It contains commercial space and offices, and in larger cities will often be described as a financial district. Geographically, it often coincides with the "city centre" or "downtown". However, these concepts are not necessarily synonymous: many cities have a central business district located away from its

Change Healthcare Inc. (previously known as Emdeon) is a healthcare technology company that provides revenue cycle management and payment processing services for healthcare providers and insurers in the United States. The business was acquired by Optum in a $13 billion deal in 2022, in an effort to combine their service operations with the aforementioned technologies that Change Healthca

Chartalism is a heterodox theory in macroeconomics that views money as a pure creation of the state, introduced to control and organize economic activity rather than arising from barter or debt.

Cheque clearing (or check clearing in American English) or bank clearance is the process of moving cash (or its equivalent) from one bank, from which a cheque is drawn, to another bank, in which it was deposited. Clearance is usually accompanied by the movement of the cheque to the paying bank, either in the traditional physical paper form or digitally under a cheque truncation system. T

Chose (pronounced: , French for "thing") is a term used in common law tradition to refer to rights in property, specifically a combined bundle of rights. A chose is the enforcement right which a party possesses in an object. The use of chose extends from the English use of French within the courts. In English and commonwealth law, all personal things fall into one of two categories, eith

Circular economy (CE), or circularity, is a model of resource production and consumption that involves sharing, leasing, reusing, repairing, refurbishing, and recycling materials and products, to extend product life cycle for as long as possible. The concept aims to tackle global challenges such as climate change, biodiversity loss, waste, and pollution by emphasizing the design-based im

Clawback or claw back is any money or benefits that have been given out, but are required to be returned (clawed back) due to special circumstances or events, such as the money having been received as the result of a financial crime, or where there is a clawback provision in the executive compensation contract.

A clearing house, often written as clearinghouse, is a financial institution formed to facilitate the exchange (i.e., clearance) of payments, securities, or derivatives transactions. The clearing house stands between two clearing firms (also known as member firms or participants).

Climate risk is the potential for problems for societies or ecosystems from the impacts of climate change. The assessment of climate risk is based on formal analysis of the consequences, likelihoods and responses to these impacts. Societal constraints can also shape adaptation options. There are different values and preferences around risk, resulting in differences of risk perception.

In economics, competition is a scenario where different economic firms are in contention to obtain goods that are limited by varying the elements of the marketing mix: price, product, promotion and place. In classical economic thought, competition causes commercial firms to develop new products, services and technologies, which would give consumers greater selection and better products.

Consumerism is a socio-cultural and economic phenomenon in which the aspirations of many individuals include the acquisition of goods and services beyond those necessary for survival or traditional displays. In contemporary consumer society, the purchase and the consumption of products have evolved beyond the mere satisfaction of basic human needs, transforming into an activity that is n

A corporate action is an event initiated by a public company that brings or could bring an actual change to the debt securities—equity or debt—issued by the company. Corporate actions are typically agreed upon by a company's board of directors and authorized by the shareholders. For some events, shareholders or bondholders are permitted to vote on the event. Examples of corporate actions

Corporate surveillance describes the practice of businesses monitoring and extracting information from their users, clients, or staff. This information may consist of online browsing history, email correspondence, phone calls, location data, and other private details. Acts of corporate surveillance frequently look to boost results, detect potential security problems, or adjust advertisin

Crowdfunding is the practice of funding a project or venture by raising money from a large number of people, typically via the internet. Crowdfunding is a form of crowdsourcing and alternative finance, to fund projects "without standard financial intermediaries". In 2015, over US$34 billion was raised worldwide by crowdfunding. One of the companies that obtained money through crowdfundin

A cryptocurrency bubble is a phenomenon where the market increasingly considers the going price of cryptocurrency assets to be inflated against their hypothetical value. The history of cryptocurrency has been marked by several speculative bubbles on a boom to bust cycle.

In monetary economics, the currency in circulation in a country is the value of

The cyclically adjusted price-to-earnings ratio (CAPE, Shiller P/E, or P/E 10 ratio) is a stock valuation measure usually applied to the US S&P 500 equity market. It is defined as price divided by the average of ten years of earnings (moving average), adjusted for inflation. As such, it is principally used to assess likely future returns from equities over timescales of 10 to 20 years, w

Debt deflation is a theory that recessions and depressions are due to the overall level of debt rising in real value because of deflation, causing people to default on their consumer loans and mortgages. Bank assets fall because of the defaults and because the value of their collateral falls, leading to a surge in bank insolvencies, a reduction in lending and by extension, a reduction in

A company's debt-to-equity ratio (D/E) is a financial ratio indicating the relative proportion of shareholders' equity and debt used to finance the company's assets. Closely related to leveraging, the ratio is also known as risk ratio, gearing ratio or leverage ratio. The two components are often taken from the firm's balance sheet or statement of financial position (so-called book value

Decimalisation or decimalization (see spelling differences) is the conversion of a system of currency or of weights and measures to units related by powers of 10.

Dedicated short-range communications (DSRC) is a technology for direct wireless exchange of vehicle-to-everything (V2X) and other intelligent transportation systems (ITS) data between vehicles, other road users (pedestrians, cyclists, etc.), and roadside infrastructure (traffic signals, electronic message signs, etc.). DSRC, which can be used for both one- and two-way data exchanges, use

At the micro-economic level, deleveraging refers to the reduction of the leverage ratio, or the percentage of debt in the balance sheet of a single economic entity, such as a household or a firm. It is the opposite of leveraging, which is the practice of borrowing money to acquire assets and multiply gains and losses.

In accountancy, depreciation refers to two aspects of the same concept: first, an actual reduction in the fair value of an asset, such as the decrease in value of factory equipment each year as it is used and wears, and second, the allocation in accounting statements of the original cost of the assets to periods in which the assets are used (depreciation with the matching principle).

The dividend payout ratio is the fraction of net income a firm pays to its stockholders in dividends:

Earning yield is the quotient of earnings per share (E), divided by the share price (P), giving E/P. It is the reciprocal of the P/E ratio.

The economy monetization is a metric of the national economy, reflecting its saturation with liquid assets. The level of monetization is determined both by the development of the national financial system and by the whole economy. The monetization of economy also determines the freedom of capital movement. Economists have long recognized the important role played by the money supply. Nev

Edward Atkinson (February 10, 1827 – December 11, 1905) was an economist, inventor, and a founder of the American Anti-Imperialist League.

Electronic business (also known as online business or e-business) is any kind of business or commercial activity that includes sharing information across the internet. Commerce constitutes the exchange of products and services between businesses, groups, and individuals; and can be seen as one of the essential activities of any business.

Electronic Regulatory Reporting (eRR) is a universal regulatory reporting solution based on legal and technical standards governed by the Energy Traders Europe (formerly European Federation of Energy Traders) that allow users to report transactions and lifecycle events to multiple regulatory reporting regimes via a uniform interface and a single message submitted in the Commodity product

Endogenous money is an economy’s supply of money that is determined endogenously—that is, as a result of the interactions of other economic variables, rather than exogenously (autonomously) by an external authority such as a central bank.

An ethical bank, also known as a social, alternative, civic, or sustainable bank, is a bank concerned with the social and environmental impacts of its investments and loans. The ethical banking movement includes: ethical investment, impact investment, socially responsible investment, corporate social responsibility, and is also related to such movements as the fair trade movement, ethica

Enterprise value/EBITDA (more commonly referred to by the acronym EV/EBITDA) is a popular valuation multiple used to determine the fair market value of a company. By contrast to the more widely available P/E ratio (price-earnings ratio) it includes debt as part of the value of the company in the numerator and excludes costs such as the need to replace depreciating plant, interest on debt

An exchange, bourse (), trading exchange or trading venue is an organized market where people can buy and sell financial instruments, such as tradable securities, commodities, foreign exchange and derivative contracts.

An exit fare is a method of collecting ridership fees, or fares, from a transportation system, where the fee (or part of the fee) is collected from passengers upon reaching their destination.

An expert system for mortgages is a computer program that contains the knowledge and analytical skills of human authorities, related to mortgage banking. Loan departments are interested in expert systems for mortgages because of the growing cost of labor which makes the handling and acceptance of relatively small loans less profitable. They also see in the application of expert systems a

Fairmat is a free-of-charge multi-platform software that allows to model financial contracts (e.g. a derivative contract) or projects with many contingencies (e.g. a Real Options model) by decomposing it into basic parts. Complex structures and dependencies are modelled using a graphical interface. Virtually any pay-off function and asset class( from interest rate derivatives to equity-l

Fare capping is a feature of public transport fare collection systems, which allows passengers to earn an unlimited-ride pass by paying single-ride fares. Typically, passengers pay a single-ride fare each time they use public transport, using a smart card or, in some cases, their own credit or debit card. An automated fare collection system tracks the payments, and awards the passenger a

The federal funds rate is the interest rate at which depository institutions (banks and credit unions) lend reserve balances to other depository institutions overnight on an uncollateralized basis. Reserve balances are amounts held at the Federal Reserve. Institutions with surplus balances in their accounts lend those balances to institutions in need of larger balances. The federal funds

Financial fragility is the vulnerability of a financial system to a financial crisis. Franklin Allen and Douglas Gale define financial fragility as the degree to which "...small shocks have disproportionately large effects." Roger Lagunoff and Stacey Schreft write, "In macroeconomics, the term "financial fragility" is used...to refer to a financial system's susceptibility to large-scale

Financial management is the business function concerned with profitability, expenses, cash, and credit. These are often grouped together under the rubric of maximizing the value of the firm for stockholders. The discipline is then tasked with the "efficient acquisition and deployment" of both short- and long-term financial resources, to ensure the objectives of the enterprise are achieve

A financial ratio or accounting ratio states the relative magnitude of two selected numerical values taken from an enterprise's financial statements. Often used in accounting, there are many standard ratios used to try to evaluate the overall financial condition of a corporation or other organization. Financial ratios may be used by managers within a firm, by current and potential shareh

In macroeconomics and economic policy, a floating exchange rate (also known as a fluctuating or flexible exchange rate) is a type of exchange rate regime in which a currency's value is allowed to fluctuate in response to international events affecting exchange rates. A currency that uses a floating exchange rate is known as a floating currency. In contrast, a fixed currency is one where

The foreign exchange market (forex, FX, or currency market) is a global decentralized or over-the-counter (OTC) market for the trading of currencies. This market determines foreign exchange rates for every currency. By trading volume, it is by far the largest market in the world, followed by the credit market.

Fractional-reserve banking is the system of banking under which banks that take deposits from the public keep only part of their deposit liabilities in liquid assets as a reserve, and lend a percentage to borrowers, thus increasing the money supply by the loaned amount. Bank reserves are held as cash in the bank or as balances in the bank's account at the central bank. Fractional-reserv

Fuel price risk management, a specialization of both financial risk management and oil price analysis and similar to conventional risk management practice, is a continual cyclic process that includes risk assessment, risk decision making and the implementation of risk controls. It focuses primarily on when and how an organization can best hedge against exposure to fuel price volatility.

Full-reserve banking (also known as 100% reserve banking) is a system of banking where banks do not lend demand deposits and instead only lend from time deposits. It differs from fractional-reserve banking, in which banks may lend funds on deposit, while fully reserved banks would be required to keep the full amount of each customer's demand deposits in cash, available for immediate with

Giovanni Villani (Italian pronunciation: [dʒoˈvanni vilˈlaːni]; c. 1276 or 1280 – 1348) was an Italian banker, official, diplomat and chronicler from Florence who wrote the Nuova Cronica (New Chronicles) on the history of Florence. He was a leading statesman of Florence but later gained an unsavoury reputation and served time in prison as a result of the bankruptcy of a trading and banki

The Greater Manchester congestion charge was part of a bid to the government's Transport Innovation Fund for a £3-billion package of transport funding and the introduction of a road congestion charge for Greater Manchester, a metropolitan county in North West England. In 2008, two cordons were proposed—the outer encircling the main urban core of the Greater Manchester Urban Area and the

The Greenspan put was a monetary policy that Alan Greenspan, during his tenure as chair of the Federal Reserve, exercised in response to financial crises. It was used for the first time with the crash of 1987. Though it was successful in addressing various crises, it became controversial as it led to periods of extreme speculation led by Wall Street investment banks overusing the put's r

GreenTech Automotive (also known as WM GreenTech Automotive Corp.) was a United States automotive manufacturer founded in 2009 that planned to develop and produce ultralow-power electric cars resembling very small cars or large golf carts. It was a Virginia corporation, with its operations based in Mississippi.

Karl Gustav Cassel (20 October 1866 – 14 January 1945) was a Swedish economist and professor of economics at Stockholm University. Cassel was among the most prominent economists in the world in the interwar period. He made contributions to the study of value, monetary policy, and business cycles.

Hedera Hashgraph, commonly known as Hedera, is a distributed ledger which uses a variant of proof of stake to reach consensus. The native cryptocurrency of the Hedera Hashgraph system is HBAR.

Hera Pheri (transl. Foul Play) is a 2000 Indian Hindi-language comedy drama film directed by Priyadarshan and originally written by Siddique-Lal and adapted screenplay by Neeraj Vora, starring Akshay Kumar, Suniel Shetty, Paresh Rawal, Tabu, Om Puri, Asrani, and Gulshan Grover. The film is a remake of 1989 Malayalam film Ramji Rao Speaking which itself was inspired by the 1971 American T

A high-occupancy toll lane (HOT lane) is a type of traffic lane or roadway that is available to high-occupancy vehicles and other exempt vehicles without charge; other vehicles are required to pay a variable fee that is adjusted in response to demand. Unlike toll roads, drivers have an option to use general purpose lanes, on which a fee is not charged. Express toll lanes, which are less

In finance, a high-yield bond (non-investment-grade bond, speculative-grade bond, or junk bond) is a bond that is rated below investment grade by credit rating agencies. These bonds have a higher risk of default or other adverse credit events but offer higher yields than investment-grade bonds to compensate for the increased risk.

Pawnbroking, lending money on portable security, began in ancient history. The practice was widespread in many parts of the world, from ancient Greece to medieval China and medieval Europe.

The history of private equity, venture capital, and the development of these asset classes has occurred through a series of boom-and-bust cycles since the middle of the 20th century. Within the broader private equity industry, two distinct sub-industries, leveraged buyouts and venture capital experienced growth along parallel, although interrelated tracks.

Huw David Dixon (/hju: devəd dɪksən/; born 1958) is a British economist. He has been a professor at Cardiff Business School since 2006, having previously been Head of Economics at the University of York (2003–2006) after being a professor of economics there (1992–2003), and the University of Swansea (1991–1992), a Reader at Essex University (1987–1991) and a lecturer at Birkbeck College

The term hype culture refers to a cultural trend within contemporary consumer culture, that corresponds to the constant search of the last "big thing". This phenomenon circulates around the concept of expectation, more precisely it is characterized by an attitude of excessive and positive expectations that consumers attach to products, services or technological advancements which have ye

Hypothec (; from Lat. hypotheca, from Gk. ὑποθήκη: hypothēkē), sometimes tacit hypothec, is a term used in civil law systems (e.g. the law of most of Continental Europe) to refer to a registered real security of a creditor over real estate, but under some jurisdictions it may additionally cover ships only (ship hypothec), as opposed to other collaterals, including corporeal movables othe

I'm Starting to Worry About This Black Box of Doom is a 2024 satirical thriller novel by Jason Pargin, published by St. Martin's Press. The standalone novel follows Abbott Coburn, a Lyft driver in Los Angeles, who is hired to transport a passenger and a sealed black box across the United States. The novel deals with internet rumour, paranoia, social media, and isolation.

The impact of microcredit is the study of microcredit and its impact on poverty reduction which is a subject of much controversy. Proponents state that it reduces poverty through higher employment and higher incomes. This is expected to lead to improved nutrition and improved education of the borrowers' children. Some argue that microcredit empowers women. In the US and Canada, it is arg

In economics, implicit contracts refer to voluntary and self-enforcing long term agreements made between two parties regarding the future exchange of goods or services. Implicit contracts theory was first developed to explain why there are quantity adjustments (layoffs) instead of price adjustments (falling wages) in the labor market during recessions.

InSoil (formerly HeavyFinance) is a Lithuanian environmental technology investment company that operates a marketplace for the agricultural industry. The company facilitates investments in debt capital for small and medium-sized agricultural enterprises to switch and expand regenerative agriculture practices such as no-till farming, mixed crop rotation, cover cropping, and the applicatio

An insurance cycle, also known as an underwriting cycle, is a term describing the tendency of the insurance industry to swing between profitable and unprofitable periods over time. The concept is most closely associated with property insurance and casualty insurance, where premiums, underwriting profits and the availability of cover are observed to rise and fall in a cyclical pattern rat

In accounting, the inventory turnover is a measure of the number of times inventory is sold or used in a time period such as a year. It is calculated to see if a business has an excessive inventory in comparison to its sales level. The equation for inventory turnover equals the cost of goods sold divided by the average inventory. Inventory turnover is also known as inventory turns, merc

In finance, an inverted yield curve is a yield curve in which short-term debt instruments (typically bonds) have a greater yield than longer term bonds. An inverted yield curve is an unusual phenomenon; bonds with shorter maturities generally provide lower yields than longer term bonds.

Investment style,

An investor is a person or entity that allocates financial capital with the expectation of a future return (profit) or to gain an advantage (interest). Through this allocated capital the investor usually purchases some species of property. Types of investments include equity, debt, securities, real estate, infrastructure, currency, commodity, token, derivatives such as put and call optio

IOTA is an open-source distributed ledger and cryptocurrency designed for the Internet of things (IoT). It uses a directed acyclic graph to store transactions on its ledger, motivated by a potentially higher scalability over blockchain based distributed ledgers. IOTA does not use miners to validate transactions, instead, nodes that issue a new transaction on the network must approve two

Khanani & Kalia International (Private) Limited (abbreviated KKI) was a Pakistani foreign exchange company that operated from 1992 to 2008, when it was closed down by the government of Pakistan for being involved in money laundering. Blocked by U.S. Department of the Treasury’s Office of Foreign Assets Control (OFAC), it was found to have also involved in the illicit international moveme

L3COS (Level 3 Consensus Operating System) is an algorithm for digitising processes based on Blockchain, which has a three-level structure and is distributed as Platform as a Service for state bodies and businesses. The algorithm is based on the blockchain, in which any decision made at any of the levels will become part of the common chain. The technology involves a three-level framewor

Leverage is defined as the ratio of the asset value to the cash needed to purchase it. The leverage cycle can be defined as the procyclical expansion and contraction of leverage over the course of the business cycle. The existence of procyclical leverage amplifies the effect on asset prices over the business cycle.

A leveraged buyout (LBO) is one company's acquisition of another company using a significant amount of borrowed money (leverage) to meet the cost of acquisition. The assets of the company being acquired are often used as collateral for the loans, along with the assets of the acquiring company. The use of debt, which normally has a lower cost of capital than equity, serves to reduce the o

In macroeconomic theory, liquidity preference is the demand for money, considered as liquidity. The concept was first developed by John Maynard Keynes in his book The General Theory of Employment, Interest and Money (1936) to explain the determination of the interest rate by the supply and demand for money.