XPayIndustry WIKIBack to home
XPAY KNOWLEDGE

Industry WIKI

Digital assets and currencies

Understand assets, networks and trading mechanics with sources you can check.

Trading basics

Account-based selling

Account-based selling, also known as account-based sales and hyper-segmented sales, is a strategic sales model in which the sale of goods or services is carried out to narrow segments of the target audience or specific decision makers. In a typical ABS concept, the selling company forms a target audience, then divides it into narrow segments to offline selling.

Assets

Avalanche (blockchain platform)

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.

Trading basics

Bill.com

BILL Holdings, Inc. is an American company based in San Jose, California, that provides automated, cloud-based software for financial operations for small businesses in the United States. A white-labeled, end-to-end payments automation platform, Bill.com Connect is offered to financial institutions as part of their single sign-on online business banking ecosystem.

Assets

Blockchain.com

Blockchain.com (formerly Blockchain.info) is a cryptocurrency financial services company. The company began as the first Bitcoin blockchain explorer in 2011 and later created a cryptocurrency wallet that accounted for 28% of bitcoin transactions between 2012 and 2020. It also operates a cryptocurrency brokerage and provides institutional markets lending business and data, charts, and ana

Trading basics

Capital market imperfections

Credit market imperfections (known academically as capital market imperfections) are limitations that reduce the range of financial contracts that can be signed or honored. There are three main theoretical drivers of imperfection: First, lenders do not have full information about the borrower, whether they have the capacity to pay back their debt and/or whether they are willing to pay (a

Banking

Central bank

A central bank, reserve bank, national bank, state bank, or monetary authority is a financial institution that manages the monetary policy of a country or monetary union. In contrast to a commercial bank, a central bank possesses a monopoly on increasing the monetary base. Many central banks also have supervisory or regulatory powers to ensure the stability of commercial banks in their j

Payments & settlement

Change Healthcare

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

Fiat currencies

Chartalism

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.

Securities & exchanges

Constant Maturity Mortgage

In the United States secondary mortgage market, the Constant Maturity Mortgage (CMM) rate is a financial index representing the theoretical yield of a par value agency residential mortgage-backed security (agency RMBS). Unlike the constant-maturity treasury (CMT) which reflects government borrowing costs, the CMM reflects the yield required by investors to transact agency RMBS (such as t

Securities & exchanges

Contingent claim

In finance, a contingent claim is a derivative whose future payoff depends on the value of another “underlying” asset, or more generally, that is dependent on the realization of some uncertain future event.

Finance

Copy trading

Copy trading enables individuals in the financial markets to automatically copy positions opened and managed by other selected individuals.

Payments & settlement

Creation Club

Creations (formerly Creation Club) is a system of microtransactions designed by Bethesda Game Studios for its games Fallout 4, The Elder Scrolls V: Skyrim – Special Edition and Starfield. The system was launched for Fallout 4 on August 29, 2017.

Finance

Credit spread (options)

In finance, a credit spread, or net credit spread is an options strategy that involves a purchase of one option and a sale of another option in the same class and expiration but different strike prices. It is designed to make a profit when the spreads between the two options narrows.

Fiat currencies

Currency in circulation

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

Trading basics

Data broker

A data broker is an individual or company that specializes in collecting personal data (such as income, ethnicity, political beliefs, or geolocation data) or data about people, mostly from public records but sometimes sourced privately, and selling or licensing such information to third parties for a variety of uses. Sources, usually Internet-based since the 1990s, may include census and

Fiat currencies

Deflation

In economics, deflation is an increase in the real value of the monetary unit of account, as reflected in a decrease in the general price level of goods and services exchanged, measurable by broad price indices.

Banking

Demand deposit

Demand deposits or checkbook money are funds held in demand accounts in commercial banks. These account balances are usually considered money and form the greater part of the narrowly defined money supply of a country. Simply put, these are deposits in the bank that can be withdrawn on demand, without any prior notice.

Trading basics

Demand shock

In economics, a demand shock is a sudden event that increases or decreases demand for goods or services temporarily.

Fiat currencies

Endogenous money

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.

Securities & exchanges

Equity premium puzzle

The equity premium puzzle refers to the inability of an important class of economic models to explain the average equity risk premium (ERP) provided by a diversified portfolio of equities over that of government bonds, which has been observed for more than 100 years. There is a significant disparity between returns produced by stocks compared to returns produced by government treasury bi

Payments & settlement

Euronet Worldwide

Euronet is an American provider of global electronic payment services with headquarters in Leawood, Kansas. It offers automated teller machines (ATM), point of sale (POS) services, credit/debit card services, currency exchange and other electronic financial services and payments software. Among others, it provides the prepaid subsidiaries Transact, PaySpot, epay, Movilcarga, TeleRecarga

Securities & exchanges

Financial innovation

Financial innovation is the act of creating new financial instruments as well as new financial technologies, institutions, and markets. Recent financial innovations include hedge funds, private equity, weather derivatives, retail-structured products, exchange-traded funds, multi-family offices, and Islamic bonds (Sukuk). The shadow banking system has spawned an array of financial innovat

Finance

Genpact

Genpact Ltd. is an American information technology services, consulting, and outsourcing company headquartered in New York City, New York. Founded in Gurgaon, India, and legally domiciled in Bermuda, Genpact employs more than 125,000 people and provides services to clients in over 30 countries worldwide. Genpact is listed on the NYSE and generated revenues of US$5.08 billion in 2025.

Fiat currencies

Gibson's paradox

Gibson's paradox is the observation that the rate of interest and the general level of prices under the gold standard are positively correlated. It is named for British economist Alfred Herbert Gibson who noted the correlation in a 1923 article for Banker's Magazine. The correlation had been noted earlier by Thomas Tooke.

Fiat currencies

Liquidity preference

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.

Fiat currencies

Lucas islands model

The Lucas islands model is an economic model of the link between money supply and price and output changes in a simplified economy using rational expectations. It delivered a new classical explanation of the Phillips curve relationship between unemployment and inflation. The model was formulated by Robert Lucas, Jr. in a series of papers in the 1970s.

Trading basics

Market (economics)

In economics, a market is any structure that allows buyers and sellers to exchange goods, services and information. The exchange of goods or services, either with money or without it, is a transaction. In free market economies, they are the process by which prices and allocations of goods and services are established. Markets facilitate trade and enable the distribution and allocation of

Securities & exchanges

Merton model

The Merton model, is a widely used "structural" credit risk model, which was developed by American economist Robert C. Merton in 1974.

Finance

Ministry of Finance (Liberia)

The Ministry of Finance is a government ministry of the Republic of Liberia. As of 2024, the Liberian Finance Minister is Augustine Kpehe Ngafuan, who was confirmed in September 2024. The minister is appointed by the President of Liberia, with the consent of Senate of Liberia.

Fiat currencies

Monetarism

Monetarism is a school of thought in monetary economics that emphasizes the role of policy-makers in controlling the amount of money in circulation. It gained prominence in the 1970s, but was mostly abandoned as a direct guidance to monetary policy during the following decade because of the rise of inflation targeting through movements of the official interest rate.

Fiat currencies

Monetary base

In economics, the monetary base (also base money, money base, high-powered money, reserve money, outside money, central bank money or, in the UK, narrow money) in a country is the total amount of money created by the central bank. This includes:

Fiat currencies

Monetary circuit theory

Monetary circuit theory is a heterodox theory of monetary economics, particularly money creation, often associated with the post-Keynesian school.

Fiat currencies

Monetary economics

Monetary economics is the branch of economics that studies the nature, role, and impact of money and monetary institutions. It provides a framework for analyzing money and its core functions—as a medium of exchange, a store of value, and a unit of account—and examines how money can achieve widespread acceptance, including through its role as a public good.

Fiat currencies

Monetary-disequilibrium theory

Monetary disequilibrium theory is a product of the monetarist school and is mainly represented in the works of Leland Yeager and Austrian macroeconomics. The basic concepts of monetary equilibrium and disequilibrium were, however, defined in terms of an individual's demand for cash balance by Mises (1912) in his Theory of Money and Credit.

Fiat currencies

Money

Money is any item or verifiable record that is generally accepted as payment for goods and services and repayment of debts, such as taxes, in a particular country or socio-economic context. The primary functions which distinguish money are: medium of exchange, a unit of account, a store of value and sometimes, a standard of deferred payment.

Banking

Money creation

Money creation, or money issuance, is the process by which the money supply of a country or economic region is increased. In most modern economies, both central banks and commercial banks create money. Central banks issue money as a liability, typically called reserve deposits, which is available only for use by central bank account holders. These account holders are generally large comm

Trading basics

Namibian dollar

The Namibian dollar (symbol: $ or N$; code: NAD) has been the currency of Namibia since 1993. It is normally abbreviated with the dollar sign ($), or alternatively N$ to distinguish it from other currencies called “dollar.” It is divided into 100 cents.

Banking

Narrow banking

Narrow banking is a banking system that restricts commercial banks to hold only safe and liquid assets, like government bonds, against customer deposits, while prohibiting traditional lending activities. Under this model, banks function as custodians and payment processors, separate from the lending function performed by other financial intermediaries. The concept emerged as a response t

Fiat currencies

Nominal rigidity

In economics, nominal rigidity, also referred to as price stickiness or wage stickiness, describes a situation in which a nominal price is slow to adjust or resistant to change. Complete nominal rigidity occurs when a price remains fixed in nominal terms for a relevant period of time. For example, the price of a good may be contractually set at $10 per unit for an entire year, regardles

Finance

Outline of finance

The following outline provides an overview and topical guide to finance:

Finance

Petrodollar recycling

Petrodollar recycling is the international spending or investment of a country's revenues in U.S. dollars from petroleum exports ("petrodollars"). It generally refers to the phenomenon of major petroleum-exporting states, mainly the OPEC members plus Russia and Norway, earning more money from the export of crude oil than they could efficiently invest in their own economies. The resulting

Fiat currencies

Polak model

The Polak model is a monetary approach to the balance of payment published by J. J. Polak in 1957. It seeks to model a small, open economy operating under fixed nominal exchange rate. Polak suggest explicit links between the monetary and external sectors. Polak results continue to form the theoretical bases on which the IMF Financial Programming are carried out.

Fiat currencies

Price level

The general price level is a hypothetical measure of overall prices for some set of goods and services (the consumer basket), in an economy or monetary union during a given interval (generally one day), normalized relative to some base set. Typically, the general price level is approximated with a daily price index, normally the Daily CPI. The general price level can change more than on

Banking

Probability of default

Probability of default (PD) is a financial term describing the likelihood of a default over a particular time horizon. It provides an estimate of the likelihood that a borrower will be unable to meet its debt obligations.

Trading basics

Quantitative fund

A quantitative fund is an investment fund that relies on systematic, data-driven methods, such as mathematical models, statistical techniques, AI, and machine learning, to make investment decisions, rather than fundamental human analysis. These funds are often referred to as systematic funds, and many employ factor investing strategies such as value and momentum, which are widely studied

Trading basics

Rational pricing

In financial economics, rational pricing is the assumption that asset pricing models must reflect the arbitrage-free price of the asset

Finance

Risk-free bond

A risk-free bond is a theoretical bond that repays interest and principal with absolute certainty. The rate of return would be the risk-free interest rate. It is primary security, which pays off 1 unit no matter state of economy is realized at time

Securities & exchanges

Risk-neutral measure

In mathematical finance, a risk-neutral measure (also called an equilibrium measure, or equivalent martingale measure) is a probability measure such that each share price is exactly equal to the discounted expectation of the share price under this measure.

Payments & settlement

Shift4

Shift4 Payments, Inc. is an American payment processing company based in Allentown, Pennsylvania. The company, founded in 1999 by the then 16-year-old Jared Isaacman, processes payments for over 200,000 businesses in the retail, hospitality, leisure, and restaurant industries. Shift4 specializes in commerce technology such as mobile payment software and hardware. The company was publicly

Trading basics

Social sorting

Social sorting is understood as the breakdown and categorization of group- or person-related raw data into various categories and segments by data manipulators and data brokers. Social sorting involves the key task of separating one group from the other. These groups can be based on income, education, race, ethnicity, gender, occupation, social status, derived power (social and political

Fiat currencies

Tally stick

A tally stick (or simply a tally) was an ancient memory aid used to record and document numbers, quantities, and messages. Tally sticks first appear as animal bones carved with notches during the Upper Palaeolithic; a notable example is the Ishango Bone. Historical reference is made by Pliny the Elder (AD 23–79) about the best wood to use for tallies, and by Marco Polo (1254–1324) who me

Banking

The Mask (1994 film)

The Mask is a 1994 slapstick superhero American comedy film loosely based on the 1991 comic book series by John Arcudi and Doug Mahnke. Directed by Chuck Russell and written by Mike Werb, the film stars Jim Carrey in the title role, along with Peter Riegert, Peter Greene, Amy Yasbeck, Richard Jeni, and Cameron Diaz. The plot follows Stanley Ipkiss (Carrey), a hapless and timid bank telle

Payments & settlement

Ticketing and Reservation System

Ticketing and Reservation System (TRS, 铁路客票发售和预订系统) is software used for rail ticketing in China Railways. It was developed by the China Academy of Railway Sciences. The first release was in 1996. As of December 2009, the version in use was version 5.2. It was named SMART before (excluding) version 4.0. It runs on Microsoft Windows.

Payments & settlement

Toast, Inc.

Toast, Inc. is an American cloud-based restaurant management software company based in Boston, Massachusetts. The company provides an all-in-one point of sale (POS) system built on the Android operating system.