Observed arrival · 2026-11-14
SPYLab’s shared-rule S&P 500 backtester
A local-first workspace for comparing S&P 500 strategies under shared backtest assumptions, with charts, metrics, and downloadable records.
- For
- Research teams comparing S&P 500 strategy rules
- Worth noticing
- Cash uses the nearest observed three-month Treasury rate, with a warning that this may not match what was known historically.
Field notes
The workspace lets users select buy-and-hold, an MA200 rule, or staged deployment of a shared starting balance, then review account value, drawdown, annual results, and transaction records. Its rulebook specifies next-trading-day-open execution, a 0.05% main cost scenario, and cash interest based on the nearest observed three-month Treasury rate. The page says snapshots stay in the current browser; uploaded files and computed results need separate export, and the final train/validation/test split is still pending group confirmation.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
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