Market analysis

Interest rate

An interest rate is the price of borrowing money or the return paid for lending or depositing it, expressed as a percentage of the principal over a stated period. Rates differ by currency, maturity, borrower credit risk, collateral, and whether they are fixed, floating, market-determined, or set administratively.

Evidence passport

What this page checked.

Sources
2
Record updated
August 18, 2026

Interest rate — definition, practical meaning, example, and common interpretation risk checked against the linked reference material

Definition checked

  • Definition and plain-English explanation for “Interest rate”
  • The worked example and the distinction described in the watch-out note
  • Reference material: Federal Reserve Board — Monetary Policy: What Are Its Goals? How Does It Work?, Federal Reserve Board — Open Market Operations

Use the term correctly

  • Read the connected terms when a definition depends on another market concept
  • Check the broker’s contract specification when applying the term to a particular product
  • Treat examples as explanations of mechanics, not as prices, forecasts, or trading advice

Method. Editorial desk review of the definition, example, related concepts, and 2 linked sources. Calculations are checked directly where the entry contains arithmetic

Research scope and limits +
  • This glossary entry explains terminology and does not test a broker, trading account, platform, or live market condition
  • Contract wording and practical treatment can differ across brokers, venues, jurisdictions, and products
Page change log +
  1. Added named authorship, a definition evidence record, application checks, and a concise scope disclosure

What Interest rate means

Interest rates appear in many forms: a central bank’s policy rate, overnight interbank rates, government-bond yields, deposit rates, and loan rates. They are related but not interchangeable. In forex, markets often compare expected rates and yields across two currencies, because those expectations can affect capital flows and the relative appeal of currency-denominated assets.

Changes in actual or expected interest rates can affect exchange rates, bond prices, share valuations, and CFD overnight financing. A policy-rate change may alter market rates quickly, but the pass-through to households, businesses, and brokers is neither automatic nor identical across products. Rate expectations can move prices before a decision occurs.

A simplified one-year loan of $10,000 at a 5% simple annual interest rate produces $500 of interest for the year: $10,000 × 0.05. The total due is $10,500, ignoring fees, compounding, taxes, and any early repayment terms. Actual loan disclosures can use different calculation conventions.

Common questions

What is the difference between an interest rate and a bond yield?+

An interest rate is a broad borrowing or lending price. A bond yield is the return implied by a bond’s market price, coupon, and maturity. Bond yields can change continuously even when a central bank’s policy rate does not.

Why do relative interest rates matter in forex?+

Currency values reflect many factors, but investors often compare expected returns on assets in different currencies. The expected difference in rates can affect hedging costs, capital flows, and the pricing of forward foreign-exchange contracts.

Go to the original material.

01Federal Reserve Board — Monetary Policy: What Are Its Goals? How Does It Work?02Federal Reserve Board — Open Market Operations