Option Greeks measure how State Street SPDR Dow Jones Industrial Average ETF Trust (DIA) option prices respond to changes in the stock price (delta and gamma), the passage of time (theta), implied volatility (vega), and interest rates (rho). These charts plot each Greek by strike, so you can see where an expiration's price risk, time decay, and volatility exposure are concentrated. DIA implied volatility is near the middle of its one-year range, so delta and gamma cover about their usual range of strikes.
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DIA Option Greeks FAQ
What are option Greeks?
Option Greeks measure how an option's price responds to changes in the stock price (delta and gamma), time (theta), implied volatility (vega), and interest rates (rho).
How do I read the DIA Greeks charts?
Gamma, theta, and vega are largest for strikes near the DIA stock price and shrink for strikes far above or below it. Theta grows as expiration gets closer, while vega is larger for expirations further out. Call delta runs from 0 to 1 and put delta from -1 to 0, near 0.50 and -0.50 at the money, and roughly estimates the chance that an option finishes in the money.
How does implied volatility affect DIA's Greeks?
DIA IV rank is 52, so implied volatility is near the middle of its one-year range. Higher implied volatility raises option premiums and daily time decay (theta), and spreads delta and gamma across a wider range of strikes. Over the past year, 30-day implied volatility ranged from 10.7% to 25.6%. See the DIA implied volatility history for a longer view.
How much gamma and delta do DIA options carry in total?
Across all open DIA options on Nov 6, 2026, net gamma exposure was -$219.75M and net delta exposure was -$838.71M per 1% move in the stock. The DIA gamma exposure chart shows where that gamma sits by strike.