How do you pick u and d from historical data, and why does widening the gap between them make a call worth more?
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Applying the model: periods first, then and
List the steps from choosing the number of periods to a single exact price, with the grid , over four periods as the example.
Matching and to history
Derive and , and record that the calibrated option price still does not depend on .
Volatility as the spread between and
State that widening the to gap with and fixed raises volatility, and show with two one-period numerical examples that the call value rises.
One pricing principle for every security
State the principle of identifying the cash flows, building a known portfolio with the same cash flows and equating the prices, and list swaps, credit default swaps and sinking-fund debt as examples.