Derivatives
Options pricing engine
Black-Scholes, a binomial tree and Monte Carlo that agree within their error bars, Greeks computed four ways, and arbitrage-free SVI volatility surfaces fitted to SPY and QQQ option chains.
Open the pricerSPY 45-day 780 call
One contract, 100 shares
- Strike
- $780.00
- Implied vol (surface)
- 12.61%
- Premium, per share
- $15.07
- Premium, per contract
- $1,507
- American price, per share
- $15.07
- Delta
- 53.9% / 54 shares
- Vega, per vol point
- $108.54
- Theta, per day
- −$19.87
Spot $778.57 at the October 9, 2026 close, forward $782.62. Vol from the fitted SVI surface, rate 4.18% from SPX put-call parity. Vega and theta per contract.