Portfolio Expected Return Calculator
The expected return of a portfolio is the sum of each holding's expected return multiplied by its weight in the portfolio. This is the foundational calculation in Modern Portfolio Theory, introduced by Harry Markowitz. It tells you the return you should expect on average given your allocation, before accounting for the randomness that makes actual returns vary. Enter up to five assets with their portfolio weights (summing to 100%) and their individual expected annual returns. The calculator validates that weights sum to 100% and computes the portfolio expected return.
Expected return formula
E(R) = sum of weight(i) * expected return(i)
(weights must sum to 100%)
Each weight is expressed as a percentage of total portfolio value. The formula is the probability-weighted average return across scenarios (or the value-weighted average across assets). It is additive: the portfolio return is the sum of each component's weighted contribution.
Portfolio construction principles
- Expected return alone is incomplete: two portfolios with the same expected return can have very different risk (standard deviation).
- Adding low-correlation assets (e.g., international stocks, bonds, real estate) can reduce risk without proportionally reducing expected return.
- Under CAPM: E(R) = risk-free rate + beta * equity risk premium, giving a theoretically grounded expected return estimate.
- The Federal Reserve publishes risk-free rate data (Treasury yields) via FRED, useful as inputs to expected return models.
- Rebalancing periodically back to target weights maintains the intended expected return and risk profile over time.
Frequently asked questions
What is portfolio expected return?
Portfolio expected return is the weighted average of each holding's expected return, where weights are the proportions of total portfolio value. If 60% is in an asset expected to return 10% and 40% in one expected to return 4%, the portfolio expected return is 0.6*10 + 0.4*4 = 7.6%.
How do I estimate expected return for each asset?
Common methods include using historical average returns (from Federal Reserve FRED data or SEC filings), using CAPM (risk-free rate + beta * equity risk premium), or analyst consensus forecasts. Historical returns do not guarantee future returns.
Does higher expected return mean lower risk?
No. Under Modern Portfolio Theory (MPT), higher expected return generally comes with higher risk (standard deviation). The efficient frontier shows the optimal portfolios that maximize expected return for a given level of risk. Diversification can reduce risk without proportionally reducing return.
What is the equity risk premium?
The equity risk premium (ERP) is the excess return that investing in stocks is expected to provide over a risk-free rate (typically 10-year Treasury yield). As of mid-2026, long-run ERP estimates range from about 3% to 6% annually. The Federal Reserve regularly publishes interest rate data useful for ERP calculations.
Does portfolio expected return need to add to 100%?
The asset weights must sum to 100% for the result to be valid. If you leave positions out, the calculator will show a note. Cash held in the portfolio should be included with its expected return (e.g., current money market rate).
Official sources
- Federal Reserve FRED: Historical Return and Rate Data.
- U.S. Treasury: Daily Treasury Yield Curve Rates.
Reviewed by the CalculatorHub team, edited by James Graham, 15 June 2026. See our methodology.