Contrarian sector rotation: each quarter buy the 3 SPDR sector ETFs that fell the most over the last 14 days, hold them equally for a quarter, and aim to catch a rebound. Concentrated, fully invested.

Every quarter, it checks the last 14 days of returns for nine SPDR sector ETFs: XLE (Energy), XLI (Industrials), XLF (Financials), XLV (Health Care), XLK (Tech), XLP (Staples), XLU (Utilities), XLY (Consumer Discretionary), XLB (Materials). It buys the 3 that dropped the most, splits money equally, and holds them for one quarter. Always fully invested; no hedge.

Out-of-sample, this contrarian sector rotation offers solid risk-adjusted gains with downside protection: ~18.7%/yr, ~17.6% max drawdown, Calmar ~1.06, beta ~0.83. It lags SPY in raw return but reduces risk and drawdown.