DEFINITION of 'Copula'
A statistical measure that represents a multivariate uniform distribution, which examines the association or dependence between many variables. Although the statistical calculation of a copula was invented in 1957, it was not applied to financial markets and finance until the late '90s.
BREAKING DOWN 'Copula'
Copulas are a mathematical tool used in finance to help identify economic capital adequacy, market risk, credit risk and operational risk. Interdependence of returns of two or more assets is usually calculated using the correlation coefficient. However, correlation only works well with normal distributions, while distributions in financial markets are mostly skewed. The copula, therefore, has been applied to areas of finance such as option pricing and portfolio valueatrisk to deal with the skewness.

Multivariate Model
A popular statistical tool that uses multiple variables to forecast ... 
Correlation Coefficient
A measure that determines the degree to which two variable's ... 
Skewness
Describe asymmetry from the normal distribution in a set of statistical ... 
Probability Distribution
A statistical function that describes all the possible values ... 
Uniform Distribution
In statistics, a type of probability distribution in which all ... 
Positive Correlation
A relationship between two variables in which both variables ...

Active Trading
What's the Correlation Coefficient?
The correlation coefficient is a measure of how closely two variables move in relation to one another. If one variable goes up by a certain amount, the correlation coefficient indicates which ... 
Fundamental Analysis
Find The Right Fit With Probability Distributions
Discover a few of the most popular probability distributions and how to calculate them. 
Forex Education
Trading With Gaussian Models Of Statistics
The entire study of statistics originated from Gauss and allowed us to understand markets, prices and probabilities, among other applications. 
Investing Basics
Using Normal Distribution Formula To Optimize Your Portfolio
Normal or bell curve distribution can be used in portfolio theory to help portfolio managers maximize return and minimize risk. 
Term
What a Normal Distribution Means
Normal distribution describes a symmetrical data distribution, where most of the results lie near the mean. 
Investing
Correlation
In the world of finance, correlation is a statistical measure of how two securities move in relation to each other. 
Investing Basics
RSquared
Learn more about this statistical measurement used to represent movement between a security and its benchmark. 
Term
What's Skewness?
Skewness describes how a data distribution leans. 
Products and Investments
4 Reasons Why Market Correlation Matters
Learn about how correlation can be used to measure how broader markets move in relation to each other. See how correlation is used to manage risk. 
Investing
What is Descriptive Statistics?
Descriptive statistics is the term applied to meaningful data analysis.

How do I calculate correlation between market indicators and specific stocks?
Discover how to calculate the correlation coefficient between market indicators and stock prices, a critical skill in technical ... Read Answer >> 
How do I find positive correlation in the stock market?
Learn how positive correlation is found in the stock market, how correlation is calculated and how positive correlation is ... Read Answer >> 
How is correlation used differently in finance and economics?
Take a look at the similarities and differences between how statistical correlation is applied in economics as opposed to ... Read Answer >> 
Can the correlation coefficient be used to measure dependence?
Understand the coefficient of correlation and its use in determining the relationship between two variables through the concepts ... Read Answer >> 
What is the difference between a copay and a deductible?
Learn how the correlation coefficient may be used to predict the relationship between the returns of two stocks, but also ... Read Answer >> 
What is the correlation between American stock prices and the value of the U.S. dollar?
The correlation between any two variables (or sets of variables) summarizes a relationship, whether or not there is any realworld ... Read Answer >>