The SPX index option is an european style option and may only be exercised on the last business day before expiration. Quotes are real-time for NASDAQ, NYSE, and NYSEAmex when available. See also delay times for other exchanges. Quotes and other information supplied by independent providers identified on the Yahoo. Finance partner page. Quotes are updated automatically, but will be turned off after 25 minutes of inactivity. Quotes are delayed at least 15 minutes.
S and p put options list