0/1 Strategy

The “0/1 strategy” is the binary regime-timing rule popularised by Bulla et al. 2010: allocate 100% to a single risky asset when the model forecasts the bull / low-volatility regime, and 100% to the risk-free asset otherwise. Its appeal is that it isolates the value of regime classification itself — there is no position sizing, leverage or optimisation to confound the test — which is why it became the standard benchmark strategy in the regime-switching asset-allocation literature, re-used by Statistical Jump Model studies and asset-specific regime work. Because it switches on a forecast regime label, its profitability is bounded directly by real-time Regime Misclassification and is highly sensitive to Transaction Costs and Slippage.

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