riskmetrics_mat: RiskMetrics model
Description
Obtains the matrix H_t, under the RiskMetrics model.
Usage
riskmetrics_mat(r_t, lambda = 0.94)
Value
A list with the \(H_t\) matrix, for each \(t\).
Arguments
- r_t
List of daily returns
- lambda
optional Decay parameter. Default to 0.94