Dutchie/DTM,
Firstly, I think I've made a mistake. If the XJO options are priced according to the SPI contract then we should be looking for SPI volatility- I just remembered that point (ie that the SPI is the underlying NOT the XJO). But then again I may be missing something and it may be the XJO!!?? This options stuff is more confusing than I thought. So the XJO options series is an option over a futures contract (SPI) rather than the value of the XJO?? Or maybe I've got my concepts mixed up.
I found the chart via google, try 'XJO and volatility'. It's from an options article on the ASX site. IT IS NOT CURRENT! So don't use it to trade, it ends around Nov 2004.
I'd also like to add that it is very silly to name an options series that tracks the SPI with the code for the XJO!! Why not 'SPIJ4' or 'SPIJJ' or something like that (instead of 'XJOJ4' or 'XJOJJ'). So basically these 'index' options appear to have little to do with the XJO Index apart from the fact that the SPI is derived from the expected value of the XJO. Aaarghh!!
Wayne, Synapse, Pos or anyone else maybe one of you experts can help us out here please.