Regarding the decay factor estimation, we obtained similar results as in the Fan et al. (2004) paper. In the case of
BET and BET-FI, the RiskMetrics estimations underestimate the decay factor, by attaching a lower weight to the
most recent variance. In the case of BET-C, we obtained that the RiskMetrics model overestimates the decay factor,
by attaching a higher weight to recent variance. Moreover, we wanted to see if the RiskMetrics model was good
enough to forecast the volatility on Romanian financial market during the financial crisis period.