Controlled experiments on real market data, with the assumptions that decide the answer exposed as controls instead of buried in a footnote. Every study here can be re-run, stressed and broken in your own browser. If an assumption changes the conclusion, you should be able to see it change — and when a strategy turns out not to work, that result gets published too.
These pages run each study at its published parameters. The working toolset behind them — a real Black–Scholes engine with a dynamic implied-volatility surface, a full chain of strikes and expirations, laddered positions and rolling — is the full simulation app. The research here is free and stays free.
Model-based research, not investment advice and not a recommendation about any portfolio or strategy. Historical index returns are real; option prices are generated from realised volatility plus stated implied-volatility and skew assumptions.