SPY and SPX—What’s the Diff and Does the Difference Matter?
In a rather cryptic and historical intro to the subject of options, Yahoo Finance states: “When it comes to the battle of SPY versus SPX, the first may have more volume, but the second has more value.” Size comparison: The SPDR S&P 500 (NYSE symbol SPY) is, in fact, the most widely traded contract on option exchanges. The SPX S&P 500 index options have far lower trading volume, but each contract is ten times the size of a SPY. Underlying security: Underlying the [...]
