/// <summary>
/// Computes the beta value of the target in relation with the reference
/// using the target and reference returns
/// </summary>
private void ComputeBeta()
{
var varianceComputed = _referenceReturns.Variance();
var covarianceComputed = _targetReturns.Covariance(_referenceReturns);
// Avoid division with NaN or by zero
var variance = !varianceComputed.IsNaNOrZero() ? varianceComputed : 1;
var covariance = !covarianceComputed.IsNaNOrZero() ? covarianceComputed : 0;
_beta = (decimal)(covariance / variance);
}
