AQuadratic programming allows for risk control through parameter estimation but generally requires many more inputs estimated from market data than other methods require
BThe screening technique provides superior risk control by concentrating stocks in selected sectors based on expected alpha
CWhen using the stratification technique, risk control is implemented by overweighting the categories with lower risks and underweighting the categories with higher risk
DWhen using the linear programming technique, risk is controlled by selecting the portfolio with the lowest level of active risk
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