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The method essentially entails using the BS formula to compute the value of two European call options: (1) A European call with the same maturity as the American call being valued, but with the stock price reduced by the present value of the dividend, and (2) A European call that expires on the day before the dividend is to be paid. The largest ...
At each final node of the tree—i.e. at expiration of the option—the option value is simply its intrinsic, or exercise, value: Max [ (S n − K), 0 ], for a call option Max [ (K − S n), 0 ], for a put option, Where K is the strike price and is the spot price of the underlying asset at the n th period.
In fact, the Black–Scholes formula for the price of a vanilla call option (or put option) can be interpreted by decomposing a call option into an asset-or-nothing call option minus a cash-or-nothing call option, and similarly for a put—the binary options are easier to analyze, and correspond to the two terms in the Black–Scholes formula.
The options trader makes a profit of $200, or the $400 option value (100 shares * 1 contract * $4 value at expiration) minus the $200 premium paid for the call.
If it is worth more, then the difference is a guide to the likelihood of early exercise. In practice, one can calculate the Black–Scholes price of a European option that is equivalent to the American option (except for the exercise dates). The difference between the two prices can then be used to calibrate the more complex American option model.
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Least Square Monte Carlo is a technique for valuing early-exercise options (i.e. Bermudan or American options). It was first introduced by Jacques Carriere in 1996. [12] It is based on the iteration of a two step procedure: First, a backward induction process is performed in which a value is recursively assigned to every state at every timestep.
In the Black–Scholes model, the price of the option can be found by the formulas below. [27] In fact, the Black–Scholes formula for the price of a vanilla call option (or put option) can be interpreted by decomposing a call option into an asset-or-nothing call option minus a cash-or-nothing call option, and similarly for a put – the binary options are easier to analyze, and correspond to ...