DAGM_X_cond_vol_no_skew: DAGM-X conditional volatility (no skewness)

In rumidas: Univariate GARCH-MIDAS, Double-Asymmetric GARCH-MIDAS and MEM-MIDAS

DAGM-X conditional volatility (no skewness)

Description

Obtains the conditional volatility for the DAGM-X. For details, see \insertCiteamendola_candila_gallo:2019;textualrumidas.

Usage

DAGM_X_cond_vol_no_skew(param, daily_ret, X, mv_m, K, lag_fun = "Beta")

Arguments

param	Vector of estimated values.
daily_ret	Daily returns, which must be an "xts" object.
X	Additional "X" variable, which must be an "xts" object. Morever, "X" must be observed for the same days of daily_ret.
mv_m	MIDAS variable already transformed into a matrix, through mv_into_mat function.
K	Number of (lagged) realizations of the MIDAS variable to consider.
lag_fun	optional. Lag function to use. Valid choices are "Beta" (by default) and "Almon", for the Beta and Exponential Almon lag functions, respectively.

Value

The resulting vector is an "xts" object representing the conditional volatility.

References

\insertAllCited

See Also

mv_into_mat.

Examples

# estimated volatility 
est_val<-c(0.01,0.80,0.05,0,0.1,1.1,-0.3,1.1)
r_t<-sp500['2005/2010']
X<-rv5['2005/2010']^0.5
mv_m<-mv_into_mat(r_t,diff(indpro),K=12,"monthly")
vol<-DAGM_X_cond_vol_no_skew(est_val,r_t,X,mv_m,K=12)
head(vol)

rumidas documentation built on April 4, 2025, 1:01 a.m.