SPY quarterly reset vs S&P 500. Subtle but real.

Plot the ratio of SPX             to SPY             and most would expect a fairly constant ratio around 10:1 to pop up. But the chart itself shows the same pattern - a quarterly reset starting at about 10.02 and then ratio decay to about 9.97. Last week we were trading 9.96 on average but at end of day Friday we popped to 10.02, right on time at options expiration..

Keep the ratio reset in mind as you do "math in your head" while studying the S&P 500             chart and pick support/resistance numbers for SPY             trades.
great work, how did you get the spx/spy ratio chart?
codypd GoldMember
Just go to the top loft of the screen where you enter the symbol to chart and type in "SPX / SPY" which Trading view interprets as "graph SPX divided by SPY". Can be done with any symbol pair.
Wow, this is a GREAT find!
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