DEFINITION of 'Robust'
A characteristic describing a model's, test's or system's ability to effectively perform while its variables or assumptions are altered. A robust concept can operate without failure under a variety of conditions.
INVESTOPEDIA EXPLAINS 'Robust'
Robustness can relate to both economic and statistical concepts. For statistics, a test is claimed as robust if it still provides insight to a problem despite having its assumptions altered or violated. In economics, robustness is attributed to financial markets that continue to perform despite alterations in market conditions. In general, being robust means a system can handle variability and remain effective.
RELATED TERMS

Variance
The spread between numbers in a data set, measuring Variance ... 
AntiFragility
A postulated antithesis to fragility where highimpact events ... 
Fama And French Three Factor Model
A factor model that expands on the capital asset pricing model ... 
Capital Asset Pricing Model  CAPM
A model that describes the relationship between risk and expected ... 
Black Scholes Model
A model of price variation over time of financial instruments ... 
Value At Risk  VaR
A statistical technique used to measure and quantify the level ...
Related Articles

Markets
The Uses And Limits Of Volatility
Check out how the assumptions of theoretical risk models compare to actual market performance. 
Fundamental Analysis
The Capital Asset Pricing Model: An Overview
CAPM helps you determine what return you deserve for putting your money at risk. 
Fundamental Analysis
Catch On To The CCAPM
The consumption capital asset pricing model smoothes over some of CAPM's weaknesses to make sense of risk aversion. 
Active Trading Fundamentals
How To Convert Value At Risk To Different Time Periods
Volatility is not the only way to measure risk. Learn about the "new science of risk management". 
Options & Futures
An Introduction To Value at Risk (VAR)
Volatility is not the only way to measure risk. Learn about the "new science of risk management". 
Professionals
Style Matters In Financial Modeling
If you're looking to get a job as an analyst, you'll need to know how to work it. 
Fundamental Analysis
What is a Null Hypothesis?
In statistics, a null hypothesis is assumed true until proven otherwise. 
Investing
How to Use Stratified Random Sampling
Stratified random sampling is a technique best used with a sample population easily broken into distinct subgroups. Samples are then taken from each subgroup based on the ratio of the subgroup’s ... 
Fundamental Analysis
Lognormal and Normal Distribution
When and why do you use lognormal distribution or normal distribution for analyzing securities? Lognormal for stocks, normal for portfolio returns. 
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.