In: Finance
Suppose that a stock's "vol" is 18%. What is periodic vol for a six-month period? Plug in a raw number rounded to 4 decimals (for example: for 5%, plug in: .0500).
Assuming the vol given is annualised volatility
Periodic vol=Annualised vol/sqrt(12)*sqrt(6)=18%/sqrt(12)*sqrt(6)=0.1273