Bollinger Band

Definition of 'Bollinger Band'


A band plotted two standard deviations away from a simple moving average, developed by famous technical trader John Bollinger.


Bollinger Band
In this example of Bollinger Bands®, the price of the stock is banded by an upper and lower band along with a 21-day simple moving average.

Investopedia explains 'Bollinger Band'


Because standard deviation is a measure of volatility, Bollinger Bands® adjust themselves to the market conditions. When the markets become more volatile, the bands widen (move further away from the average), and during less volatile periods, the bands contract (move closer to the average). The tightening of the bands is often used by technical traders as an early indication that the volatility is about to increase sharply.

This is one of the most popular technical analysis techniques. The closer the prices move to the upper band, the more overbought the market, and the closer the prices move to the lower band, the more oversold the market.

Want to know more? Read The Basics Of Bollinger Bands



Related Video for 'Bollinger Band'

comments powered by Disqus
Hot Definitions
  1. Yield Burning

    The illegal practice of underwriters marking up the prices on bonds for the purpose of reducing the yield on the bond. This practice, referred to as "burning the yield," is done after the bond is placed in escrow for an investor who is awaiting repayment.
  2. Marginal Analysis

    An examination of the additional benefits of an activity compared to the additional costs of that activity. Companies use marginal analysis as a decision-making tool to help them maximize their profits. Individuals unconsciously use marginal analysis to make a host of everyday decisions. Marginal analysis is also widely used in microeconomics when analyzing how a complex system is affected by marginal manipulation of its comprising variables.
  3. Treasury Inflation Protected Securities - TIPS

    A treasury security that is indexed to inflation in order to protect investors from the negative effects of inflation. TIPS are considered an extremely low-risk investment since they are backed by the U.S. government and since their par value rises with inflation, as measured by the Consumer Price Index, while their interest rate remains fixed.
  4. Gilt-Edged Switching

    The selling and repurchasing of certain high-grade stocks or bonds to capture profits. Gilt-edged switching involves gilt-edged security, which can be high-grade stock or bond issued by a financially stable company such as the Blue Chip companies or by certain governments.
  5. Master Limited Partnership - MLP

    A type of limited partnership that is publicly traded. There are two types of partners in this type of partnership: The limited partner is the person or group that provides the capital to the MLP and receives periodic income distributions from the MLP's cash flow, whereas the general partner is the party responsible for managing the MLP's affairs and receives compensation that is linked to the performance of the venture.
  6. Class Action

    An action where an individual represents a group in a court claim. The judgment from the suit is for all the members of the group (class).
Trading Center