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Digital assets and currencies

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

Banking

Adjustable-rate mortgage

A variable-rate mortgage, adjustable-rate mortgage (ARM), or tracker mortgage is a mortgage loan with the interest rate on the note periodically adjusted based on an index which reflects the cost to the lender of borrowing on the credit markets. The loan may be offered at the lender's standard variable rate/base rate. There may be a direct and legally defined link to the underlying inde

Finance

Affirm Holdings

Affirm Holdings, Inc. is an American financial technology company and a point-of-sale lender. Founded in 2012 by PayPal co-founder Max Levchin, it is the largest U.S. based buy now, pay later (BNPL) financier. As of 2026, Affirm reports nearly 28 million users and processes $50 billion in annual payments.

Banking

Annual percentage rate

Annual percentage rate of charge (APR), corresponding sometimes to a nominal APR and sometimes to an effective APR (EAPR), is the interest rate for a whole year (annualized), rather than just a monthly fee/rate, as applied on a loan, mortgage loan, credit card, etc. It is a finance charge expressed as an annual rate. Those terms have formal, legal definitions in some countries or legal j

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

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

Payments & settlement

Credit card

A credit card (or charge card) is a payment card, usually issued by a bank, allowing the card's users to purchase goods and services, or withdraw cash on credit. Card use thereby accrues debt that must be repaid later.

Finance

Flat rate (finance)

In accounting and finance, flat interest rate mortgages and loans calculate interest based on the amount of money a borrower receives at the beginning of the loan. However, if repayment is scheduled to occur at regular intervals throughout the term, the average amount to which the borrower has access is lower and so the effective or true rate of interest is higher. Only if the principa

Finance

Index of real estate articles

This aims to be a complete list of the articles on real estate.

Banking

Loan

In finance, a loan is the tender of money by one party to another with an agreement to pay it back. The recipient, or borrower, incurs a debt and is usually required to pay interest for the use of the money.

Banking

Microcredit

Microcredit is the extension of very small loans (microloans) to borrowers with limited access to traditional credit who typically do not have access to traditional banking services due to a lack of collateral, steady employment, and a verifiable credit history. The primary aim of microcredit is to support entrepreneurship, facilitate self-employment, and alleviate poverty, particularly

Finance

Microfinance

Microfinance is the provision of financial services to individuals and small businesses, particularly those with low incomes and limited access to conventional banking and related financial services. It encompasses services such as microcredit, savings, checking accounts, microinsurance, and payment systems.

Finance

Outline of finance

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

Finance

Overdraft

An overdraft occurs when something is withdrawn in excess of what is in a current account. For financial systems, this can be funds in a bank account. In these situations the account is said to be "overdrawn". In the economic system, if there is a prior agreement with the account provider for an overdraft, and the amount overdrawn is within the authorized overdraft limit, then interest i

Banking

Predatory lending

Predatory lending refers to unethical practices conducted by lending organizations during a loan origination process that are unfair, deceptive, or fraudulent. While there are no internationally agreed legal definitions for predatory lending, a 2006 audit report from the office of inspector general of the US Federal Deposit Insurance Corporation (FDIC) broadly defines predatory lending a

Finance

Remortgage

A remortgage (known as refinancing in the United States) is the process of paying off one mortgage with the proceeds from a new mortgage using the same property as security. The term is mainly used commercially in the United Kingdom, though what it describes is not unique to any one country. Often the purpose of switching is to secure a more favorable interest rate from a different lende

Trading basics

Unsecured debt

In finance, unsecured debt refers to any type of debt or general obligation that is not protected by a guarantor, or collateralized by a lien on specific assets of the borrower in the case of a bankruptcy or liquidation or failure to meet the terms for repayment. Unsecured debts are sometimes called signature debt or personal loans. These differ from secured debt such as a mortgage, whic