Dirty Price

by / ⠀ / March 20, 2024

Definition

The “Dirty Price” in finance refers to the price of a bond that includes not only the present value of future cash flows but also any accrued interest. This is the price a buyer actually pays for the bond, unlike the “clean price” which excludes the accrued interest. The accrued interest is the interest that the bond has earned since the last interest payout up to the point of sale.

Key Takeaways

  1. The term “Dirty Price” in finance refers to the price of a bond or other fixed income security that includes the present value of all future cash flows, including accrual interest. Thus, it represents the total cost to buy the bond, not just the bond’s face value.
  2. A dirty price contrasts with a “clean price,” which refers only to the price of the bond excluding accrued interest. Traders quote bonds using the clean price, but when the transaction is settled, the buyer pays the dirty price.
  3. The dirty price fluctuates constantly as the level of accrued interest changes daily. However, the clean price remains relatively stable, changing only due to movements in interest rates or changes in the credit quality of the issuer.

Importance

The finance term “Dirty Price” is significant as it provides a more accurate and comprehensive valuation of a bond or any fixed income security.

The dirty price includes both the clean price, which is the market value of the bond excluding any interest that has accumulated, and the accrued interest.

It therefore offers investors and financial analysts a clearer view of the total cost to purchase a bond at any point in time.

By considering the dirty price, investors can effectively factor in the time value of money and the interest earned, helping them make more informed investment decisions.

Essentially, the dirty price provides a fuller picture of a bond’s value.

Explanation

Dirty price in finance refers primarily to the price of a bond inclusive of any accrued interest. In this context, the purpose of a dirty price is to give a complete picture of the bond’s value at a particular point in time. Bonds pay periodic interest to their holders, typically semi-annually or annually.

Hence, a portion of the bond’s next interest payment accrues with every passing day. When buyers purchase a bond between coupon payment dates, they must compensate the sellers for the interest accrued up until the date of sale. This accrued interest is accounted for in the bond’s dirty price, thus providing an all-inclusive cost of the bond transaction to the buyer.

Essentially, the dirty price is used to somehow ‘normalize’ bond trading, so as to ensure that sellers do not lose out on the interest that has been accumulating since the last coupon payment and buyers understand that they are, in turn, responsible for that interest. Therefore, by using dirty price, accurate financial calculations and assessments can be made, and both sellers and buyers are assured of a fair trade. Remember, the dirty price changes daily as the bond’s accrued interest changes, highlighting its dynamic nature and integral role within bond market pricing.

Examples of Dirty Price

Bonds: In the bond market, it is the most common place to find the term dirty price. For instance, if an investor decides to purchase a bond in the middle of the payment term, the price paid will be the dirty price of the bond, which is a sum of the clean price (the worth of the bond at face value) and accrued interest from the last coupon payment.

Treasury Bills: If an investor decides to buy a treasury bill from another investor before it matures, the price to be paid by the new investor is the dirty price. This is calculated by adding the initial cost of the bill plus the interest that it has accumulated up to the point of sale.

Mortgage-Backed Securities: These securities often include pre-decided payment schedules. If a potential buyer is considering purchasing such a security in the middle of a payment cycle, they will have to pay the dirty price, i.e., the clean price plus the interest already accrued within the ongoing payment cycle.

FAQ: Dirty Price

What is Dirty Price?

Dirty Price is the price of a bond that includes any accrued interest since the bond’s last payment date. It reflects the total price an investor would actually pay if they purchased the bond.

What is the difference between dirty and clean price?

Dirty Price includes accrued interest in the price of a bond, while clean price does not. Clean price is the price of the bond alone, and is typically quoted in bond tables.

How is the Dirty Price calculated?

The Dirty Price of a bond is calculated by adding the clean price of a bond and its accrued interest. It represents the gross price an investor would pay to purchase the bond.

Why is the Dirty Price important?

The Dirty Price is important as it gives the buyer an accurate picture of the total cost of purchasing a bond, including any accrued interest. Without consideration of the Dirty Price, an investor may underestimate the actual cost of a bond purchase.

Related Entrepreneurship Terms

  • Bond Yield
  • Clean Price
  • Accrued Interest
  • Face Value
  • Coupon Rate

Sources for More Information

  • Investopedia : A comprehensive online source of finance and investment-related definitions and articles.
  • Reuters : An international news organization providing financial information and business news worldwide.
  • Morningstar : A global investment research firm providing independent ratings and data on mutual funds, stocks, and other financials.
  • Bloomberg : A major global provider of 24-hour financial news and information, including real-time and historic price data, financials data, trading news and analyst coverage.

About The Author

Editorial Team

Led by editor-in-chief, Kimberly Zhang, our editorial staff works hard to make each piece of content is to the highest standards. Our rigorous editorial process includes editing for accuracy, recency, and clarity.

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