Greeks Across Strikes — SPY 30D (April 17, 2026)
The Greeks aren't math abstractions. They're the four knobs the market pays you to turn. Today's snapshot is a cross-section of all four across the SPY option chain.
The Snapshot (April 17, 2026)
- Underlying: SPY @ 586.40
- Expiry: 30-day
- ATM Delta (call): 0.52
- ATM Gamma: 0.014
- ATM Theta: -0.399
- ATM Vega: 0.499
How to Read This Chart
Four panels, four stories:
- Delta — your directional exposure, strike by strike. Calls near 1.0 at deep ITM, calls near 0.0 at deep OTM. The slope through the strike tells you how much your delta moves if the spot moves (that's gamma).
- Gamma — peaks ATM. This is where the pain and the pleasure are. Gamma is what makes ATM options feel alive; it's also what makes theta burn faster there.
- Theta — also peaks ATM (most negative). You're paying the most rent per day on the strike where the action is.
- Vega — peaks ATM too. Whoever is long volatility is most sensitive right at the money.
The Big Idea
ATM options are the most alive. OTM and ITM options trade more on their intrinsic story (spot level, time to expiry) than on the Greeks. That's why the ATM strike is where short-dated scalpers and 0DTE traders congregate — it's where every Greek is steepest.
How to Use This on OptionsLabPro
The Greeks Explorer lets you drag a DTE slider and watch these four curves reshape live. Short-dated options have extreme gamma peaks and theta pits; long-dated options smooth out. That difference in shape, not just level, is the heart of why calendar spreads, diagonals, and butterflies work.
For a hands-on walkthrough of each Greek, the lesson The Greeks goes strike by strike.