df_financial            Stock returns and financial conditions.
fit_mfgarch             This function estimates a multiplicative
                        mixed-frequency GARCH model
plot_weighting_scheme   This function plots the weighting scheme of an
                        esimated GARCH-MIDAS model
simulate_mfgarch        This function simulates a GARCH-MIDAS model
simulate_mfgarch_diffusion
                        This function simulates a GARCH-MIDAS model
                        where the short-term GARCH component is
                        replaced by its diffusion limit, see Andersen
                        (1998)
