HISTORICALRISK
Estimate expected risk, correlation matrix, or covariance matrix for assets using historical data.
Last updated
Estimate expected risk, correlation matrix, or covariance matrix for assets using historical data.
Last updated
The following risk model estimates covariances based on equally-weighted historical observations.
The following describes the function signature for use in Microsoft Excel's formula bar.
| Argument | Description |
|---|---|
type | Required. Enumeration string to specify calculation type: "risk", "sigma", or "stdev" "correlation", "corr", or "rho", "covariance", "covar", or "cov" |
assetReturns | Required. Time series or matrix of asset returns. |
dataPeriodicity | Optional. Periodicity of the data, used for annualization. If you do not enter the argument, it defaults to 1. e.g. Daily = 255, Monthly = 12, Yearly = 1, Quarterly = 4. |
Depending on the specified output type, the function will return the respective vector of risk estimates (annualized standard deviations), correlation matrix, or a covariance matrix.
