Weighted Average Market Capitalization

AAA

DEFINITION of 'Weighted Average Market Capitalization'

A stock market index weighted by the market capitalization of each stock in the index. In such a weighting scheme, larger companies account for a greater portion of the index. Most indexes are constructed in this manner, with the best example being the S&P 500.

BREAKING DOWN 'Weighted Average Market Capitalization'

For example, if a company's market capitalization is $1 million and the market capitalization of all stocks in the index is $100 million, then the company would be worth 1% of the index. The alternative to weighting by market cap is a price-weighted index such as the Dow Jones Industrial Average.

RELATED TERMS
  1. Outstanding Shares

    A company's stock currently held by all its shareholders, including ...
  2. Free-Float Methodology

    A method by which the market capitalization of an index's underlying ...
  3. Price-Weighted Index

    A stock index in which each stock influences the index in proportion ...
  4. Market Capitalization

    The total dollar market value of all of a company's outstanding ...
  5. Standard & Poor's 500 Index - S&P ...

    An index of 500 stocks chosen for market size, liquidity and ...
  6. Unweighted Index

    A simple arithmetic or geometric average used to calculate stock ...
Related Articles
  1. Insurance

    Market Capitalization Defined

    Find out the differences between mega-, large-, mid- and small-cap stocks and how each suits different investing styles.
  2. Mutual Funds & ETFs

    ETF Tracking Errors: Protect Your Returns

    Tracking errors tend to be small, but they can still adversely affect your returns. Learn how to protect against them.
  3. Mutual Funds & ETFs

    3 Types Of Indexing For ETF Success

    ETF success relies on the index with which it's paired. Discover three index genres for tracking average market performance.
  4. Economics

    The ABCs Of Stock Indexes

    Indexes can track market trends, but they're not always reliable. Can you trust them?
  5. Mutual Funds & ETFs

    Index Investing

    Get to know the most important market indices and the pros and cons of investing in them.
  6. Investing Basics

    What's a Price-Taker?

    Price-taker is an economic term describing a market participant who has no effect on overall market activity.
  7. Investing Basics

    What are Class B Shares?

    Class B shares are one classification of common stock issued by corporations.
  8. Mutual Funds & ETFs

    ETF Analysis: ProShares UltraPro Nasdaq Biotech

    Obtain information about an ETF offerings that provides leveraged exposure to the biotechnology industry, the ProShares UltraPro Nasdaq Biotech Fund.
  9. Mutual Funds & ETFs

    ETF Analysis: iShares MSCI Europe Financials

    Learn about the iShares MSCI Europe Financials fund, which invests in numerous European financial industries, such as banks, insurance and real estate.
  10. Mutual Funds & ETFs

    ETF Analysis: SPDR S&P Insurance

    Learn about the SPDR S&P Insurance exchange-traded fund, which follows the S&P Insurance Select Industry Index by investing in equities of U.S. insurers.
RELATED FAQS
  1. What does the S&P 500 index measure and how is it calculated?

    The S&P 500 measures the value of stocks of the 500 largest corporations by market capitalization listed on the New York ... Read Full Answer >>
  2. How is the value of the S&P 500 calculated?

    The S&P 500 is a U.S.market index that gives investors an idea of the overall movement in the U.S.equity market. The ... Read Full Answer >>
  3. Where do penny stocks trade?

    Generally, penny stocks are traded through the use of the Over the Counter Bulletin Board (OTCBB) and through pink sheets. ... Read Full Answer >>
  4. Where can I buy penny stocks?

    Some penny stocks, those using the definition of trading for less than $5 per share, are traded on regular exchanges such ... Read Full Answer >>
  5. How does the stock market react to changes in the Federal Funds Rate?

    The stock market reacts to changes in the federal funds rate in various ways depending on where it is in the business cycle. ... Read Full Answer >>
  6. What are the requirements for being a Public Limited Company?

    The requirements for an entity to be considered a public limited company (PLC) include registration requirements, establishing ... Read Full Answer >>

You May Also Like

Hot Definitions
  1. Dead Cat Bounce

    A temporary recovery from a prolonged decline or bear market, followed by the continuation of the downtrend. A dead cat bounce ...
  2. Bear Market

    A market condition in which the prices of securities are falling, and widespread pessimism causes the negative sentiment ...
  3. Alligator Spread

    An unprofitable spread that occurs as a result of large commissions charged on the transaction, regardless of favorable market ...
  4. Tiger Cub Economies

    The four Southeast Asian economies of Indonesia, Malaysia, the Philippines and Thailand. Tiger cub economy indicates that ...
  5. Gorilla

    A company that dominates an industry without having a complete monopoly. A gorilla firm has large control of the pricing ...
  6. Elephants

    Slang for large institutions that have the funds to make high volumes trades. Due to the large volumes of stock that elephants ...
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!