Spy options versus ES options:
5 SPY options = 1 ES Option
SPY Strikes are spread twice as far as ES:
1.00 versus 5 points.
Spread: 0.01 - 0.02 versus .50 - 1.00
($5-$10 versus $25 - $50 using 5 spy = 1 es)
ES options are available 23h/day but generally liquid with tighter...