Free investing tools
Calculators and data pages you can use without an account. The calculators run in your browser and use real historical returns where it matters.
Test a portfolio on real data
- Portfolio backtest Up to five US or European ETFs with your weights and rebalancing, on real monthly returns, against a benchmark.
- Rolling returns The worst, median and best 1, 3, 5, 10 and 15-year periods of any ETF or lazy portfolio.
- Efficient frontier Return and volatility of every mix of two or three ETFs, and the mixes that did best for each level of risk.
- Drawdown recovery The gain needed to recover a loss, and how long real falls took to get back to the previous high.
- ETF correlation matrix How up to 10 US and European ETFs moved together over 3, 5 or 10 years of monthly returns.
Plan your savings
- DCA calculator What investing a fixed amount every month in an ETF or lazy portfolio would have returned, against a lump sum.
- Compound interest calculator Contributions and growth over time, tested against real S&P 500 periods of the same length.
- FIRE calculator Your FI number, savings rate and the years until investments can cover your spending.
- Retirement calculator Monte Carlo on real stock and bond returns: the chance your savings last and the spending with 90% success.
- Fee impact calculator How much a higher yearly cost takes from the final value over the years.
- CAGR calculator Compound annual growth rate from two values, compared with real ETF returns.
- Rebalancing calculator What to buy or sell to get back to your target weights, or how to rebalance with new money only.
Risk measures
Market data
- Famous investors’ portfolios What Buffett, Ackman, Dalio, Soros, Burry and others own, and what they bought and sold last quarter (13F).
- ETF returns and comparisons Returns, drawdowns and head-to-head comparisons of US and UCITS ETFs.
- Lazy portfolios compared All Weather, 60/40, Three-Fund and 24 more, backtested over the same years, with their history.
- COT report tool CFTC Commitments of Traders positioning by market.
- SEC 13F tracker What large fund managers bought and sold last quarter.