I GUESS THE POINT IS TO GET A MORE COMPREHENSIVE MODEL OF THE MARKET EVEN IF IT USES BS IV AS A FUNCTION OF STOCK PRICE AND DTE TO GET IT. EDIT: OR MAYBE IT HELPS TRADING LESS LIQUID OPTIONS
@sna is looking for some insight here into the treatment of volatility in Emanual Derman's book - assuming from the title of his original post. Much of the genuine quant talent that was/is here is either hiding in the weeds or moved to a genuine institutional messaging site.
Why would anyone teach anyone about options if you can't call them horrible politically incorrect names and throw things at their head?