The GARCH(1,1) volatility estimate shares a similarity to EWMA volatility: both assign greater (lesser) weight to recent (distant) returns. But the GARCH(1,1) has an additional feature: it models a long-run (aka, unconditional) variance toward which the volatility series is pulled.
David's XLS is here: https://trtl.bz/2t794bU
David's XLS is here: https://trtl.bz/2t794bU
