How to Calculate Fluctuations in Excel. Calculating data fluctuations-- also called variance -- is a multi-step process that requires total accuracy. Excel 2010 provides two basic formulas for ...

To calculate statistical variance in Microsoft Excel, use the built-in Excel function VAR.

Learn how to calculate the net present value (NPV) of your investment projects using Excel's XNPV function.

With Excel and data from your broker, however, calculating the average return is fairly easy using the XIRR function. How to calculate average stock returns in Excel ...