See Also:
Direct Labor Variance Formulas
Direct Material Variance Formulas
Variance Analysis
Financial Instruments
Common Stock Definition

Covariance Definition

The covariance in finance is the degree or amount that two stocks or financial instruments move together or apart from each other.

Meaning of Covariance

The covariance means that investors have the opportunity to seek out different investments based upon their respective risk adversity. If the covariance is negative then this means that the two instruments move opposite one another depending on the economy. This then becomes a way for investors to diversify some of their risks away.
If an investor were to buy two stocks with a negative covariance then in a boom period one would earn more than the other and vice versa for a recession.
If an investor were to care solely about the return and no risk then an investor might choose two stocks that have a positive covariance based solely on their expected returns. This means that this particular investor has the chance to make a big gain, but also a bad loss. This is because the two instruments will move with each other and there is no diversification in the portfolio of two stocks.

Covariance Example

Tim has been doing some research in the market and has narrowed his search down to three stocks. However, Tim only has enough money to invest in two of the stocks. The covariances are as follows:

A and B Stock = -100
A and C Stock = 100
B and C Stock = 0

Depending on Tim’s risk adversity he will make different decisions. If he is simply looking solely at the returns he will choose stocks A and C because they have the highest potential returns but also the highest potential loss. If he were very risk averse he would choose stocks A and B because the amount of risk has been diversified away. The final option would not be chosen because stocks B and C have no covariance or correlation between each other. The two stocks simply move independently and there is not as much potential to diversify or maximize the risk and return.
Note: The result assumes weights of 50% will be put into each stock for each investment opportunity.


Mining the Balance Sheet for Working Capital

Mining the Balance Sheet for Working Capital Let’s face it… There has been significant liquidity in the marketplace over the past couple of years. Debt and equity capital has been relatively easy to find and commercial banks have been very willing participants as capital providers; however, many of the commercial banks have admitted that this robust marketplace

Read More »

Is Your Business Bankable?

Businesses call us for many reasons but here are two very common reasons why we get called… They are growing and want to strengthen the financial function. OR They are in financial distress and can’t find a way out. Why does a business need to be bankable? What does being bankable mean? In this blog,

Read More »

Alternative Forms of Financing

It happens all the time. Companies need capital, but they aren’t bankable. Banks or other financial institutions will not touch them because they are either too risky, not able to meet covenants, or it just doesn’t work out for some reason. So, where do those companies go? They need to look at alternative forms of

Read More »


Financial Leadership Workshop

MARCH 28TH-31ST 2022


Financial Leadership Workshop


June 12-15th, 2023

WIKI CFO® - Browse hundreds of articles