Backtest which weekday produces the best overnight short returns on leveraged / inverse ETFs.
Shorts at the selected day's close and covers at the next trading day's open. Friday covers the full weekend hold into Monday's open.
Short at the selected weekday’s close, cover at the next trading day’s open.
Friday covers the full Fri → Mon three-day weekend hold, weekend gap included.
Filters trades by the VIX regime on the day of entry.
< 20: calm regime — often tough for shorts as trends grind upward.
20-30: elevated, choppier tape where shorts can find edge.
> 30: crisis regime — sharpest drawdowns but snap-back rallies can whipsaw.
Scans every weekday (Mon–Fri) under the current VIX Regime and selects the day with the highest CAGR.
Requires a minimum trade count to avoid picking a day with too few samples.