Weighted Average Maturity - WAM

AAA

DEFINITION of 'Weighted Average Maturity - WAM'

The weighted average of the time until all maturities on mortgages in a mortgage-backed security (MBS). The higher the weighted average to maturity, the longer the mortgages in the security have until maturity. Also known as "average effective maturity".

INVESTOPEDIA EXPLAINS 'Weighted Average Maturity - WAM'

The measure is calculated by totaling each mortgage value represented by the MBS. The weights of each mortgage is found by dividing the value of each into the total of all. To arrive at the WAM number the weight of each security is multiplied by the time until maturity of each mortgage, and then all the values are added together. For example say an MBS has three mortgages valued at $1,000, $2,000 and $3,000 (a total of $6,000) and mature in one, two and three years respectively. The weights of these are 1/6 (1,000/6,000), 1/3 (2,000/6,000) and 1/2 (3,000/6,000). The WAM is 2 1/3 years (1/6 x 1 year + 1/3 x 2 years + 1/2 x 3 years).

RELATED TERMS
  1. Mortgage

    A debt instrument, secured by the collateral of specified real ...
  2. Weighted Average Remaining Term ...

    The remaining life of an asset-backed security or a mortgage-backed ...
  3. Weighted Average Loan Age - WALA

    A dollar-weighted average measuring the age of the individual ...
  4. Weighted Average Life - WAL

    The average number of years for which each dollar of unpaid principal ...
  5. Dwarf

    A slang term used to describe a pool of mortgage backed securities ...
  6. Pass-Through Security

    A pool of fixed-income securities backed by a package of assets. ...
RELATED FAQS
  1. Where can I find year-to-date (YTD) returns for benchmarks?

    Benchmarks are securities or groups of securities against which investment performance is analyzed. Examples of popular equity ... Read Full Answer >>
  2. What is the effective interest method of amortization?

    The effective interest method is an accounting practice used for discounting a bond. This method is used for bonds sold at ... Read Full Answer >>
  3. Under what circumstances would someone enter into a repurchase agreement?

    In finance, a repurchase agreement represents a contract between two parties, where one party sells a security to the other ... Read Full Answer >>
  4. What type of asset allocation should I use if I am already retired?

    Among investors, asset allocation is a topic of discussion that receives a great deal of weight during the asset accumulation ... Read Full Answer >>
  5. What are some examples of smart beta ETFs that use passive and active management?

    There are a number of smart beta exchange-traded funds (ETFs) that use passive and active management, including the WisdomTree ... Read Full Answer >>
  6. How does implied volatility impact the pricing of options?

    Implied volatility is an important aspect of the time value premium of an option. As implied volatility increases, call and ... Read Full Answer >>
Related Articles
  1. Credit & Loans

    Understanding The Mortgage Payment Structure

    We explain the calculation and payment process as well as the amortization schedule of home loans.
  2. Savings

    Explaining Term Deposits

    A term deposit (more often called a certificate of deposit or CD) is a deposit account that is made for a specific period of time.
  3. Economics

    What's a Maturity Date?

    Maturity date is the final date when any remaining principal and any unpaid interest are due on a debt.
  4. Professionals

    Worried About Stocks? Try on Convertibles

    Convertibles are a good hedge against equity market risk (if you're o.k. with losing a bit of upside potential).
  5. Stock Analysis

    Playing Rising Rates with Ultra-Short Term Bonds

    With rising rates likely, investors may want to consider adding a dose of ultra-short bonds to their portfolios. Here are some ETFs to consider.
  6. Professionals

    Why Investors Are Bailing on Bond ETFs

    Investors are fleeing bond ETFs. Should you follow the herd? Hint: It depends on the type of bond.
  7. Professionals

    Is a Bond Market Selloff Coming?

    A big investment management company is concerned about bond market conditions and allocating more capital to cash. Should you follow?
  8. Credit & Loans

    What is a Syndicated Loan?

    A syndicated loan is one that involves a group of lenders (called the syndicate) who pool their lending resources to make a loan.
  9. Investing Basics

    What is an Asset-Backed Security?

    An asset-backed security (ABS) is a debt security collateralized by a pool of assets.
  10. Taxes

    What is an Ad Valorem Tax?

    An ad valorem tax is a levy placed on real or personal property based on the assessed value of that property.

You May Also Like

Hot Definitions
  1. American Dream

    The belief that anyone, regardless of where they were born or what class they were born into, can attain their own version ...
  2. Multicurrency Note Facility

    A credit facility that finances short- to medium-term Euro notes. Multicurrency note facilities are denominated in many currencies. ...
  3. National Currency

    The currency or legal tender issued by a nation's central bank or monetary authority. The national currency of a nation is ...
  4. Treasury Yield

    The return on investment, expressed as a percentage, on the debt obligations of the U.S. government. Treasuries are considered ...
  5. Bund

    A bond issued by Germany's federal government, or the German word for "bond." Bunds are the German equivalent of U.S. Treasury ...
  6. European Central Bank - ECB

    The central bank responsible for the monetary system of the European Union (EU) and the euro currency. The bank was formed ...
Trading Center
×

You are using adblocking software

Want access to all of Investopedia? Add us to your “whitelist”
so you'll never miss a feature!