Option Greeks measure how Aecom (ACM) 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. ACM implied volatility is near the bottom of its one-year range, which keeps delta and gamma in a narrower range of strikes than usual.
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ACM 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 ACM Greeks charts?
Gamma, theta, and vega are largest for strikes near the Aecom 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 ACM's Greeks?
Aecom IV rank is 16, so implied volatility is near the bottom 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 20.5% to 177.9%. See the ACM implied volatility history for a longer view.
How much gamma and delta do ACM options carry in total?
Across all open Aecom options on Nov 4, 2026, net gamma exposure was -$6.04K and net delta exposure was $2.56M per 1% move in the stock. The ACM gamma exposure chart shows where that gamma sits by strike.
What is Aecom?
Aecom is one of the largest global providers of advisory, design, and engineering services.