is there a symbol for the SPX implied volatility?

thanks

Hello Razv,

VIX.XO is the IQFeed symbol for the S&P 500 volatility index from the CBOE.
If you were thinking of something else, let me know and we will try again.

I was not referring to the VIX.
I attached the SPX implied volatility. Here is a print screen of the SPX implied volatility from InteractiveBrokers (last 2 days). You can see is very different from the VIX, which at one point today was -10%.
I would like to get this from your feed in order to render the graph in InvestorRT.

Hello again,

We do not have a symbol for Option Implied Volatility.
While your screenshot chart is titled SPX from the CBOE,
it looks like the Option Implied Volatility view that you are
showing may be a feature of that particular software.

that is the implied volatility of ATM options, which is different from the VIX, because any quote (on BID or ASK) can trigger a trade.
For the CBOE's VIX one would can put a quote deep out of the money just to get a higher/lower VIX. On page 6 of this document (www.cboe.com/micro/vix/vixwhite.pdf) you can find how the VIX is calculated and how deep OTM options can influence the VIX.
It would be great if DTN could offer a symbol for the SPX IV (which is the implied volatility of ATM options)

Thanks for the insight Razv.
That sounds like a good nomination for our IQFeed
Data wish list. If you would like, feel free to add that at:
http://forums.dtn.com/index.cfm?page=forum&forumID=15