Close this search box.

Table of Contents



Parity in finance refers to a situation where two financial instruments or securities are equal in value or have an equivalent worth. This equality can be observed in various contexts, such as currency exchange rates, options (when an option’s strike price is equal to the current market price of the underlying asset), and bond yield rates. Parity helps traders and investors identify fair market values, evaluate investment opportunities, and maintain balanced portfolios.


The phonetic pronunciation of “Parity” is /ˈpærɪti/.

Key Takeaways

  1. Parity is a concept used in various domains such as mathematics, computer science, or finance. It refers to the idea of equality, evenness, or equivalence between two entities, values, or systems.
  2. In computer science, parity is commonly used in error detection and correction schemes. Examples include parity bits and RAID storage systems, where an extra bit is added to a data set, allowing the detection and possible correction of transmission or storage errors.
  3. In finance, parity is often applied in foreign exchange markets, where two currencies are said to be at parity if their exchange rate is equal to 1:1. Purchasing power parity (PPP) is another concept related to parity in finance, focusing on the comparison of the value of different currencies in terms of what they can buy in their respective countries.


Parity is an important concept in business and finance because it signifies a condition of equality or equivalence between two or more economic entities or instruments. In the context of financial markets, it is often used to compare the value of currencies, shares, or options. Ensuring parity prevents market distortions, promotes fair competition, and encourages the flow of capital and investments across borders. By maintaining parity in valuation, investors can make informed decisions and allocate their resources efficiently, ultimately contributing to a healthy and stable global financial ecosystem.


Parity is a functional concept in the world of finance and business, primarily concerned with the notion of balance and equivalence between various assets, entities or transactions. The primary purpose of parity is to establish a level playing field by ensuring that an investor gets equal value from two or more options, thereby preventing any unfair advantage or unwarranted losses. This fosters an environment of fair competition, and encourages stability and efficiency in financial systems. Some common types of parity that investors may encounter include purchasing power parity, interest rate parity, and option parity. By identifying situations where parity exists, market participants can make informed decisions, hedge their risks, and take advantage of possible arbitrage opportunities. Understanding parity plays an essential role in the development and execution of investment strategies, risk assessment, and cross-border transactions. In international finance, for example, purchasing power parity (PPP) reflects the balance between the exchange rates for two different currencies, considering the relative prices of goods and services in each country. By using PPP as a basis for currency valuation, companies engaged in global operations can better comprehend the true value of transactions and make more precise financial decisions, ultimately leading to reduced risks in foreign exchange markets. Similarly, interest rate parity helps companies and investors determine the right investment opportunities between domestic and foreign markets, taking into account differences in interest rates. Although parity-based analyses may not always predict an exact quantitative balance, it nevertheless contributes significantly to a clearer and more comprehensive understanding of financial scenarios, empowering investors to make more informed decisions and propel market efficiency.


1. Purchasing Power Parity (PPP): This concept is used to compare the purchasing power of different currencies in their respective countries. When two currencies are at par, it means that a basket of goods and services should cost the same in both countries when the exchange rate is considered. For example, if a Big Mac costs $5 in the United States and the exchange rate is 1 USD = 0.85 EUR, the same Big Mac should cost €4.25 in the Eurozone (assuming the theory holds true). PPP is essential for macroeconomic analysis and setting exchange rate policies. 2. Interest Rate Parity (IRP): This refers to the relationship between the interest rates of two countries and their respective currency exchange rates. In a well-functioning market, the difference in interest rates should be equal to the percentage difference between the forward exchange rate and the spot exchange rate. This concept is vital for understanding international capital flows and foreign exchange market equilibrium. For example, if the interest rate in the US is 2% and in the UK it’s 1%, the GBP/USD forward exchange rate should be 1% higher than the spot exchange rate, thus creating a state of interest rate parity. 3. Bond Parity: This concept applies to bonds that are convertible into common stock. When the total value of the convertible bond is equal to the value of the shares that it converts into, it is said to be trading at parity. For example, if a convertible bond with a face value of $1,000 can be converted into 50 shares of a company’s stock, and the current market price of the shares is $20, then the bond is trading at parity since the value of the shares (50 x $20 = $1,000) is equal to the face value of the bond. Bond parity helps investors determine whether a convertible bond is fairly priced and if it is more beneficial to hold the bond or convert it into shares.

Frequently Asked Questions(FAQ)

What is parity in finance and business terms?
Parity refers to the condition where two or more financial instruments or economic indicators possess the same value, equal price level or equivalency in the financial market. It is often used to compare currencies, commodity prices, interest rates, or other assets in various markets.
What is the significance of parity in the financial market?
Parity is significant in financial markets as it represents a state of equilibrium for two or more financial instruments. It aids investors and traders in making informed decisions by comparing relative values and understanding when assets are undervalued or overvalued.
How does currency parity work?
Currency parity occurs when the exchange rate between two currencies is 1:1, which effectively means that the purchasing power of both currencies is equal. This concept helps compare the relative value of currencies and assess their strength in the international market.
Can parity occur in the options market?
Yes, parity can occur in the options market, specifically when the price of an option is equal to its intrinsic value. This means that the option is “at parity” and there’s no advantage in exercising the option as opposed to purchasing the underlying asset directly.
How is purchasing power parity (PPP) applied in economics?
Purchasing Power Parity (PPP) is the economic principle stating that the amount of money needed to purchase the same basket of goods and services in two different countries should be equal, once the exchange rate is taken into consideration. PPP is often used to compare the cost of living in different countries and to estimate the currency exchange rates that should hold in the long run.
How does parity impact international trade and investments?
Parity plays a crucial role in international trade and investments, as it helps investors and businesses alike identify discrepancies in the fair valuation of currencies or assets. Understanding parity can assist investors in determining the best investments, making the best use of finance strategies, and comparing countries’ relative value in the international market.

Related Finance Terms

  • Purchasing Power Parity (PPP)
  • Interest Rate Parity (IRP)
  • Exchange Rate Parity
  • Put-Call Parity
  • Convertible Bond Parity

Sources for More Information

  • Investopedia:
  • IG:
  • The Business Professor:

About Our Editorial Process

At Due, we are dedicated to providing simple money and retirement advice that can make a big impact in your life. Our team closely follows market shifts and deeply understands how to build REAL wealth. All of our articles undergo thorough editing and review by financial experts, ensuring you get reliable and credible money advice.

We partner with leading publications, such as Nasdaq, The Globe and Mail, Entrepreneur, and more, to provide insights on retirement, current markets, and more.

We also host a financial glossary of over 7000 money/investing terms to help you learn more about how to take control of your finances.

View our editorial process

About Our Journalists

Our journalists are not just trusted, certified financial advisers. They are experienced and leading influencers in the financial realm, trusted by millions to provide advice about money. We handpick the best of the best, so you get advice from real experts. Our goal is to educate and inform, NOT to be a ‘stock-picker’ or ‘market-caller.’ 

Why listen to what we have to say?

While Due does not know how to predict the market in the short-term, our team of experts DOES know how you can make smart financial decisions to plan for retirement in the long-term.

View our expert review board

About Due

Due makes it easier to retire on your terms. We give you a realistic view on exactly where you’re at financially so when you retire you know how much money you’ll get each month. Get started today.

Due Fact-Checking Standards and Processes

To ensure we’re putting out the highest content standards, we sought out the help of certified financial experts and accredited individuals to verify our advice. We also rely on them for the most up to date information and data to make sure our in-depth research has the facts right, for today… Not yesterday. Our financial expert review board allows our readers to not only trust the information they are reading but to act on it as well. Most of our authors are CFP (Certified Financial Planners) or CRPC (Chartered Retirement Planning Counselor) certified and all have college degrees. Learn more about annuities, retirement advice and take the correct steps towards financial freedom and knowing exactly where you stand today. Learn everything about our top-notch financial expert reviews below… Learn More