Data-Driven · Real Historical Data
Financial Tools Built on
150 Years of Real Data
Backtest portfolios, simulate market scenarios, explore crash history, and understand what the numbers actually say - all powered by real historical data from 1871 to today.
🚀 The Story
From Market Insight to AI-Built Execution
Built with AI, shaped by real market experience. The tools here start from the questions investors actually face - not the assumptions that make the math easier.
What makes this different
- 💡 Most tools give you a point-in-time answer. Enter a lump sum today, get an expected return. That is not how most people invest - we invest monthly, in small amounts, over years. This platform shows you exactly how those regular investments accumulate over time, month by month, dollar by dollar.
- 🌍 Historical scenario investing - through real world events. Most platforms do not let you test what your portfolio would have looked like through the 2008 crash, the dot-com bust, or the Great Depression. We do. You pick the years, set a monthly amount, and see the real historical outcome - not a model, not a projection. Actual data going back to 1871, powered by the Robert Shiller dataset from Yale Economics.
- 🔄 Flexible by design. Start with a lump sum and no monthly additions - you get a point-in-time simulation like any other tool. Add a monthly amount and you see what consistent investing actually does through a crash. Same tool, two very different questions answered.
- 🎲 Probability, not just a single outcome. The Monte Carlo simulator runs 1,000 independent trials drawn from 150 years of Shiller return history, giving you realistic probability bands — P10 to P90 — so you can see the full range of what your portfolio might do, not just the average.
- 📊 Beyond just returns. See sector correlation, drawdown depth, dividend growth, crash recovery timelines, and the worst 5-year stretches in market history and what followed — tools that institutional investors use, now available for everyone.
The rule every simulation follows: portfolios buy at the monthly HIGH price - worst-case entry, every month. No cherry-picking. So when the numbers look good, you can trust them.
Featured tools
Start Exploring
A few of the most popular tools on the platform.
S&P 500 History
150+ years of S&P 500 annual returns visualized as a decade heatmap. See every bull run, every crash, every recovery since 1871.
Historical
S&P 500 Historical Simulator
Pick any year range since 1872, set a starting amount and monthly contribution, and see the exact real-history outcome.
Simulator
5-Year Crash Periods & Recovery
The worst 5-year stretches in S&P 500 history — and what the market returned in the 2 years that followed each crash.
Historical
Annual Market Extremes
The best and worst full calendar years in S&P 500 history since 1871. See what each extreme year did to $10,000.
Historical
Asset Allocation Simulator
Backtest any ETF/stock mix with real DCA investing. See exactly what your portfolio would have been worth.
Simulator
Latest insights
What the Data Shows
Data-driven articles on markets, investing, and long-term financial planning.
The 10 Worst Years in S&P 500 History (1871–2024)
What actually happened in the market's most catastrophic calendar years — and what $10,000 turned into after each one.
Read article →
After the Crash: What S&P 500 Returns Looked Like in the 2 Recovery Years That Followed
History shows the 2 years after the worst 5-year crashes tell a surprisingly consistent story. We ran the data back to 1871.
Read article →
Dollar Cost Averaging Into ETFs: What 150 Years of Data Actually Shows
DCA is one of the most recommended strategies in investing. Here's what the historical data actually says about how well it works.
Read article →
Will Your Portfolio Last 30 Years? A Monte Carlo Analysis
We ran 1,000 simulations from real Shiller data to answer the question every retiree asks: what are the odds I run out of money?
Read article →