This a simple calculator that determines the price of a stock option. Specify
  • value of the stock
  • strike price
  • risk-free interest rate (% per year)
  • dividend on the stock (% per year)
  • volatility of the stock (% per year)
  • time till expiry (days)
Pick your choice of PUT or CALL option and then press CALCULATE! Or use the second calculator to determine the implied volatility when you fix the price of the option.

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