Comment Comment by fractorial SPY is an ETF and SPX is an index. The distinction is material./ES does not trade between 5pm and 6pm ET. SPX options aren't marked until 8:15 PM ET.It's more plausible that large caps see MWF, then MTWHF possibly. parent fractorial 7 months ago
/ES does not trade between 5pm and 6pm ET. SPX options aren't marked until 8:15 PM ET.
It's more plausible that large caps see MWF, then MTWHF possibly.