What is the SPX? Is it a tradable instrument? I understand what the SPY is the SP500 ETF. And the ES is the futures instrument of the SP500 but confused about the SPX. Is SPX just a calculation of the price of the SP500?

blackgrey45 

What is the SPX? Is it a tradable instrument? I understand what the SPY is the SP500 ETF. And the ES is the futures instrument of the SP500 but confused about the SPX. Is SPX just a calculation of the price of the SP500?

You can trade SPX, its options.

blackgrey45 

What is the SPX? Is it a tradable instrument? I understand what the SPY is the SP500 ETF. And the ES is the futures instrument of the SP500 but confused about the SPX. Is SPX just a calculation of the price of the SP500?

"SPX" is the S&P 500 index. Many platforms and charting/quote services will use this if you want to just see the index itself.

There are also SPX options on the Chicago Board Options Exchange.

The SPX itself is not a tradeable instrument, but the options are of course, and they will have SPX in their symbols, as you might expect.

Bob.