...ces and sometimes the BID ASK and LAST fields are missing. Is there a reason why the data returned from the API varies for the exact RIC .SPX?
I have confirmed the index <.SPX> updates from 9:30 to 16:30 EST. This is also the reason why there was no update between 11 AM (6AM EST) - 2 PM London time (9AMEST), Market has not opened yet. However there should still be a BID ASK and LAST field available regardless? Also, when I query at 9:15 GMT (4:14 EST) there is still data along with the BID ASK and LAST fields.