September 16th, 2005, 6:22 am
So far as I know,there're lots of article regarding this issue,one prevailing approach is via regression to estimate vol.several papers use "(K/(S*sqrt(t))" as a explaination varialbe in their regression model,where K is strike price and S is underlyingprice and t is remianing time.Also,Some papers found that there's a certain relationship between implied vol and (implied vol-ATM series implied vol).If you mean option's implied volatility,I have some papers for reference.BTW,you can try to use GARCH or EWMA model to make you better understand.Regards
Last edited by
wesker on September 15th, 2005, 10:00 pm, edited 1 time in total.