Stock Backtest - BacktestLab

$500 a month in TQQQ for 10 years, starting with $500: on past prices from January 2016 to December 2025, with $60,500 paid in, this app's backtest ends at $438K. That is a past result. The same screen shows how far it fell on the way. BacktestLab runs that kind of question on past prices. Put monthly investing next to a single lump sum, or one portfolio next to another, and read them side by side. ■ Whole shares only Many calculators assume fractional shares. This one does not. It buys only the whole shares that the day's price allowed and carries the leftover cash forward. ■ Dividends, reinvested or kept Dividends arrive as cash on the payment date. Reinvest them to buy shares again at that day's price, or keep them as cash and see them counted separately from the final value. ■ Risk next to the return Maximum drawdown, the drawdown chart and named crisis windows sit in the result next to the final value. ■ Build a portfolio Up to ten weighted assets. Choose a rebalancing interval and the original weights are restored on that schedule. ■ Compare Two portfolios over the same period, under the same conditions, side by side. ■ The next 10 years, as an assumption Continue a result with an annual return you enter yourself. It is drawn as an assumption, not as a measurement. ――― This app is a calculator based on past data. It is not investment advice, and past results do not indicate future returns. Taxes and trading fees are not included. No account is created. Calculations run on your device, and your portfolios and saved runs stay there. Available in English and Korean.