I believe that the historical option prices is a big problem for a strategy developper in options.
First, very few historical data-providers of historical data -- I am aware of one that I have used in the past, CQG. Daily close data is also provided by Bloomberg Professional.
But, the day-on-close data can be very misleading. For example, take for example, Eurodollar options. If you look on Bloomberg you will see very small daily volumes, that is one. Two what you will see as bid/ask prices (and no bid size/ask size at all) is simply wrong. Why? Because most of the volume is traded in so-called packages (straddles, strangles, spreads etc.) that are neither reported nor carefully collected by anybody, as far as I know. You can see 100 lots change hands today in a call, whereas it is actually highly liquid with 60000 changed hands and bid/offer size more that 1000 at a time.
Using such data can lead to some very misleading stratgies...
What do you guys think and how anybody handles these difficulties.
Thanks!