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Time-weighted return. Related Articles. Time-weighted returns is a measure of the compound rate of return of a portfolio over a stated period of time. It requires a set of sub-period returns to be calculated whenever there is an external cash flow, such as a deposit or withdrawal from the portfolio.
= ((FV/PV)^(1/n)) â 1. Where FV is the investmentâs ending value, PV is its ending value, and n is the # of years. The XIRR function in Excel also calculates an internal rate of return (IRR) that can also be used to calculate the CAGR. The XIRR function is: