Two Asset Portfolio Variance Calculator: Optimize Your Investment Strategy

The calculator shows how mixing two assets changes risk and return in seconds. Enter prices, returns, volatilities, and their correlation; it outputs expected return and variance. For example, a 30 % weight in a 6 %/12 % asset and 70 % in a 10 %/22 % asset with 0.25 correlation yields 8.8 % return and 0.0278 variance—far below holding the riskier asset alone. U.S. stocks averaged 15.8 % annual volatility between 1926-2022 (S&P Dow Jones Indices, 2023).