Stock Portfolio Backtesting Calculator
Backtest a multi-stock investment portfolio using real historical data — with dividends, DRIP, periodic contributions, and rebalancing strategies.
For educational purposes only. Past performance does not guarantee future results. Not financial advice.
How the Portfolio Backtesting Calculator Works
The Stoculator portfolio calculator lets you simulate how a multi-stock portfolio would have performed using real historical market data. Enter your stock tickers, set allocation weights, choose a start date, and see detailed performance metrics including total return, compound annual growth rate (CAGR), time-weighted return (TWR), and maximum drawdown.
Features
- Dividend reinvestment (DRIP) simulation — see the effect of reinvesting dividends on returns over time
- Periodic contributions and withdrawals — model dollar-cost averaging with weekly, monthly, or quarterly contributions
- Portfolio rebalancing strategies — simulate automatic rebalancing at various frequencies to maintain target allocations
- Benchmark comparison — compare a portfolio's time-weighted return against the S&P 500 or other index funds
- Drawdown metrics — view maximum drawdown percentage, drawdown periods, recovery times, and underwater charts
- Asset and sector allocation charts — visualize how a portfolio is distributed across individual holdings and market sectors
Understanding the Results
After running a backtest, the calculator displays a results dashboard with portfolio summary metrics, a historical performance chart, allocation breakdowns, dividend timelines, and detailed per-holding analytics. All calculations use adjusted closing prices from historical market data.
Past performance is not indicative of future results. Simulated results are based on historical data and do not account for trading fees, taxes, or market impact. This tool is for educational purposes only and does not constitute financial advice.
