- Coverage
- Stock seasonality: United States, India and Canada, subject to available history. Options reference and volume data: mapped US-listed underlyings.
- Search limits
- The last possible entry can be up to 60 calendar days after the first. Entries must fall within the next 365 days. Holds range from 7 to 180 calendar days. A search allows up to 240 entry/hold combinations and 1,500 qualifying symbols. Symbols × combinations × history years must not exceed 2 million.
- Matching dates
- Each historical year uses the same month and day. Entry and exit move independently to the first stored trading session on or after their nominal boundary, within seven days. February 29 maps to February 28 in non-leap years. Missing or invalid endpoints exclude that observation.
- Return calculation
(exit close / entry close - 1) × 100, using split-adjusted closes without cash-dividend adjustments. These are underlying price returns before costs, not options-strategy profits.
- Selection
- Return and matching-year rankings choose each symbol's window using that metric. Stock/options-volume rankings select the window by median directional return, then rank symbols by volume. Reserved years do not select or qualify the window.
- Universe
- The screener uses currently active listings, not a reconstruction including every company later delisted. Searching many symbols and windows creates selection bias; an appealing historical result can occur by chance.