Variance is a measurement of the spread between numbers in a data set. Investors use the variance equation to evaluate a portfolio’s asset allocation.

Mean-variance analysis is standard practice in many business schools and financial planning programs. You know the drill: take a pool of randomly selected data points such as stock returns measured ...

Many finance teams treat variance analysis as a box-checking exercise: Set a threshold, flag the swing, move on. That’s why so many controllers spend days chasing noise while risks slip through. It’s ...

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A stock's historical variance measures the difference between the stock's returns for different periods and its average return. A stock with a lower variance typically generates returns that are ...

Stock's historical variance measures its return stability over time. Higher variance indicates greater return unpredictability and risk. Calculate variance using Excel to simplify the process for ...