medium · FRM Part 1

An American put option is valued at 7.92 in a two-step tree, while an otherwise identical European put is valued at6.19.

What does the difference of $1.73 represent?

  1. The time value of the option.
  2. A calculation error in the binomial model.
  3. The impact of the risk-free rate on terminal values.
  4. The early-exercise premium.

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