I traded a SPY 0DTE call on September 1, and I’ve been trying to understand how much of the premium move came from SPY itself versus the volatility.
Here's exactly what happened.
The setup
ISM Manufacturing PMI dropped at 10am. Before the release, the SPY 763 call was quoted around $1.40 bid and $1.42 ask, with IV showing 13.76%. Cheap. Premium barely moving. Market hadn't priced in much uncertainty at all.
But there was something else happening on the chart before the number even dropped. The 5 minute ORB high broke clean before 10am. Price pushed above the opening range with conviction and held. That break was the first signal, not the PMI itself. The data just confirmed what price was already trying to do.
Two reasons to be in the trade going into the number. ORB break giving directional bias. IV still cheap, giving a good entry price on premium.
The trade
-SPY 0DTE 763 Call. Slightly OTM.
- Entry: 10:05am at $1.60
- Exit: 10:20am at $2.50
- Result: +$900. 15 minutes.
What IV did after PMI printed
763 Call IV jumped to 17.65%. Bid $2.78 ask $2.80.
Nearly 4 percentage points of IV expansion the moment the number hit. Premium almost doubled on the strike, from ask $1.42 to $2.80.
Two things happened simultaneously SPY moved in the right direction, and IV expanded. Both pushed premium higher at the same time. That combination is why the exit at $2.50 happened in 15 minutes instead of waiting for a larger price move to get there.
Why the ORB break mattered
Entering purely on the PMI play without the ORB confirmation would've been a directional guess dressed up as a catalyst trade. The ORB break meant price had already shown its hand before the data dropped. PMI just added fuel to a move that was already in motion.
That's a different trade from just buying before a number and hoping. Structure plus catalyst plus cheap IV all three lining up at the same time.
The actual takeaway
Not all catalysts inflate IV before the release. Some data drops especially when consensus expectations are flat, leave IV relatively low going in. That's the window where buying premium before the number can work in your favor instead of against you.
ORB break for direction. IV check for entry timing. If both line up before a catalyst that's the setup worth taking.
Check IV before deciding whether to enter before or after a catalyst. If IV is already elevated wait. If IV is still cheap and structure is there, the expansion after the number can add to the directional move rather than fight it.
Do you check IV levels before deciding when to enter around economic data or just trade the price action?