Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Standard deviation measures how spread out numbers are from the mean. Variance calculates the average degree to which each number is different from the mean. Both metrics help assess volatility in ...

If the expected return on two projects is the same but the second has a higher variance (or standard deviation), then the first will be preferred. Also, if the variance on the two projects is the same ...

Financial variance is the difference between budgeted and actual spending. Positive variance means spending less, negative indicates overspending. Regular monitoring reduces surprises and improves ...