A daily, signal-driven dip-buy model that uses BRK/A, SPY, QQQ, and XLK to enter on momentum/oversold signals, with 100% cash allocation to the chosen asset when triggered and cash preservation otherwise.

A daily, rule-based system looks for a buy signal among a small set of assets (BRK/A, SPY, QQQ, XLK). The signals come from simple momentum checks like RSI (a measure of recent price strength) and price comparisons between short- and long-term moving averages. If the oversold condition in XLK is detected (RSI under 31 on a 10-day window), the strategy buys XLK with 100% of available cash. If XLK isn’t oversold, the system may instead trigger a buy in BRK/A or SPY/QQQ based on other momentum tests (e.g., BRK/A RSI over 80 relative to SPY, or SPY’s short-term EMA vs long-term MA relationship). In all cases, when a signal fires, the system allocates all available cash to the selected asset and rebalances the portfolio daily. If no signal fires, you stay in cash. The intent is to exploit historical dip environments since 1999 by entering on disciplined, signal-driven opportunities rather than random timing. The plan also uses SPY as a core market barometer and XLK as a tech-side signal, with BRK/A acting as a proxy for quality/value exposure.

Out-of-sample edge: ~25.1% annualized return, Sharpe ~1.47, Calmar ~1.65, max drawdown ~15.2% vs SPY ~18.8%. A cash-backed dip-buy strategy offering higher risk-adjusted gains and better downside control than the S&P 500.