I am trying to calculate IV of options for a ticker over the last 10 years. Problem is that some option prices don't make sense (for example, closing price \$31.94, but 30-day call option with 18 days ...
I would assume that day to day movement in stock can be accurately compared with the Adjusted Close Price and not simply the Close Price, taking into account Stock Splits Dividends etc. ...
I'm curious whether anybody has any experience with using trend lines drawn using data which is vs isn't adjusted for dividends. For periods of sideways trading that give roughly horizontal ...