(4.60% / 4.97% - 1.0) / 4 = - 1.86% it’s not exactly 1.85 because i use non-rounded rv, and in the screenshot you have only 2 decimals.
4 calendar days = last trading date (oct 21) - last data available date (which was friday 18 because you posted on saturday) + 1
Sorry about the late answer, i hope it helps.