In Tradestation I did a "lookup" for S&P 500 and found both the INX and SPX.X as stated in my original post above. For you Tradestation users, which one do you use? Thanks.
sallyboy, $INX works for Realtick. I'm assuming you meant $INX.X, even so I thought that was the "Internet" sector-index symbol. In Realtick I use $SPX.X for the cash S&P.
Magna Sallyboy is correct, with Realtick $INX works for S&P 500 cash, as well as $spx.x. Not sure about other vendors though.
Very funny thing going on here. For my Realtick: $INX = S&P 500 cash $INX.X = n/p (no price) $SPX.X = n/p $DOT.X = The Street.com Internet Index I wonder how that can be different for all of us using Realtick.
FWIW - I believe it's not just Realtick that does this - INX.X is the CBOE Internet Index, INX is the S&P cash index (source unknown), and SPX.X is the S&P cash index from the CBOE INX and SPX.X should be the same but occassionally I've seen differences (e.g., gaps in data on one but not the other).