Kelly准则仓位管理

You calculate Kelly position sizing by estimating expected excess return (μ) and variance (σ²), then computing base Kelly f* = μ / σ² to maximize long-term capital growth while controlling portfolio risk.

Fractional Kelly adjusts the base Kelly fraction downward based on confidence levels, asset correlations, and capital usage constraints, reducing drawdown risk while maintaining long-term growth potential in multi-asset portfolios.

Dynamic position sizing across multiple assets applies the Kelly formula to each opportunity's win rate and payoff, then adjusts for cross-asset correlation and concentration limits to allocate capital between core holdings and marginal opportunities.

Kelly criterion position sizing works for single-asset strategies by calculating the optimal bet size from expected return and variance, capping the allocation at 100%, and applying confidence-based adjustments to limit drawdown risk.

Kelly criterion limitations include sensitivity to inaccurate estimates of expected returns and variance, potential over-concentration without fractional adjustments, and the need for reliable probability data to avoid excessive drawdowns in volatile markets.