It is a computed index, but unlike most indexes (US30/UK100) it is not computed based on stock prices. But more an estimate of how volatile the price of SP500 will be between now and the expiration date.
It is a computed index, but unlike most indexes (US30/UK100) it is not computed based on stock prices. But more an estimate of how volatile the price of SP500 will be between now and the expiration date.