What is Breadth of Market?
Breadth of market is an indicator used in security analysis, computed by taking the ratio of the number of advancing stocks to declining stocks on a stock market. Market breadth indicators analyze the number of stocks advancing relative to those that are declining in a given index or on a stock exchange.
Why does it Matter?
Market breadth is an important indicator because it helps investors and analysts understand the overall sentiment of the market. When more stocks are advancing than declining, it suggests that the bulls are in control of the market's momentum, which can confirm a price rise in the index. Conversely, a disproportional number of declining securities can confirm bearish momentum and a downside move in the stock index.
History
The concept of breadth of market is not new and has been used in security analysis for a long time. However, the exact dates and historical context are not specified in the provided source.
How is it Calculated?
Breadth of market is calculated by taking the ratio of the number of advancing stocks to declining stocks. This can be done for a specific index, such as the S&P 500, or for the entire stock exchange, like the New York Stock Exchange (NYSE) or Nasdaq.
Examples
A simple example of how breadth of market works is as follows:
- If 100 stocks are advancing and 20 are declining, the breadth of market would be 5:1 (100 advancing / 20 declining).
- If 80 stocks are advancing and 30 are declining, the breadth of market would be 2.67:1 (80 advancing / 30 declining).
Market Breadth Indicators
Some common market breadth indicators include:
- Advance-Decline Line: a line that plots the difference between the number of advancing and declining stocks over time.
- New Highs-New Lows: a measure of the number of stocks making new highs versus new lows.
- Breadth Thrust: a measure of the percentage of stocks in the index that are advancing.
FAQ
How is breadth of market used in practice? Breadth of market is used by investors and analysts to understand the overall sentiment of the market and make informed investment decisions.
What are some common market breadth indicators? Common market breadth indicators include the Advance-Decline Line, New Highs-New Lows, and Breadth Thrust.
Can breadth of market be used to predict market trends? While breadth of market can provide valuable insights into market sentiment, it is not a foolproof predictor of market trends.
How is breadth of market calculated? Breadth of market is calculated by taking the ratio of the number of advancing stocks to declining stocks.
What is the difference between breadth of market and stock performance? Breadth of market measures the overall sentiment of the market, while stock performance measures the individual performance of a specific stock.