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This resource provides an in-depth overview of options, including calls and puts, their structures, and valuation methods. Key concepts such as financial alchemy with options, the factors determining option value, and the utilization of the Black-Scholes Option Pricing Model are critically examined. The document offers practical examples of calculating call and put prices, alongside discussions on various strategies including protective puts and straddles. Aimed at finance students and professionals, this guide is essential for mastering options in corporate finance.
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Principles of Corporate Finance Brealey and Myers Sixth Edition • Spotting and Valuing Options Slides by Matthew Will Chapter 20 Irwin/McGraw Hill • The McGraw-Hill Companies, Inc., 2000
Topics Covered • Calls, Puts and Shares • Financial Alchemy with Options • What Determines Option Value • Option Valuation
Option Terminology Call Option Right to buy an asset at a specified exercise price on or before the exercise date.
Option Terminology Put Option Right to sell an asset at a specified exercise price on or before the exercise date. Call Option Right to buy an asset at a specified exercise price on or before the exercise date.
Option Value • The value of an option at expiration is a function of the stock price and the exercise price.
Option Value • The value of an option at expiration is a function of the stock price and the exercise price. Example - Option values given a exercise price of $85
Option Value Call option value (graphic) given a $85 exercise price. Call option value $20 85 105 Share Price
Option Value Put option value (graphic) given a $85 exercise price. Put option value $5 80 85 Share Price
Option Value Call option payoff (to seller) given a $85 exercise price. Call option $ payoff 85 Share Price
Option Value Put option payoff (to seller) given a $85 exercise price. Put option $ payoff 85 Share Price
Option Value Protective Put - Long stock and long put Long Stock Position Value Share Price
Option Value Protective Put - Long stock and long put Long Put Position Value Share Price
Option Value Protective Put - Long stock and long put Long Stock Protective Put Position Value Long Put Share Price
Option Value Protective Put - Long stock and long put Protective Put Position Value Share Price
Option Value Straddle - Long call and long put - Strategy for profiting from high volatility Long call Position Value Share Price
Option Value Straddle - Long call and long put - Strategy for profiting from high volatility Long put Position Value Share Price
Option Value Straddle - Long call and long put - Strategy for profiting from high volatility Straddle Position Value Share Price
Option Value Straddle - Long call and long put - Strategy for profiting from high volatility Straddle Position Value Share Price
Option Value Stock Price Upper Limit
Option Value Stock Price Upper Limit Lower Limit (Stock price - exercise price) or 0 whichever is higher
Option Value Components of the Option Price 1 - Underlying stock price 2 - Striking or Exercise price 3 - Volatility of the stock returns (standard deviation of annual returns) 4 - Time to option expiration 5 - Time value of money (discount rate)
Option Value Black-Scholes Option Pricing Model OC = Ps[N(d1)] - S[N(d2)]e-rt
Black-Scholes Option Pricing Model OC = Ps[N(d1)] - S[N(d2)]e-rt OC- Call Option Price Ps - Stock Price N(d1) - Cumulative normal density function of (d1) S - Strike or Exercise price N(d2) - Cumulative normal density function of (d2) r - discount rate (90 day comm paper rate or risk free rate) t - time to maturity of option (as % of year) v - volatility - annualized standard deviation of daily returns
Black-Scholes Option Pricing Model Ps S v2 2 ln + ( r + ) t (d1)= v t N(d1)= 32 34 36 38 40
Cumulative Normal Density Function Ps S v2 2 ln + ( r + ) t (d1)= v t (d2) = d1 - v t
Call Option Example What is the price of a call option given the following? P = 36 r = 10% v = .40 S = 40 t = 90 days / 365
Call Option Example What is the price of a call option given the following? P = 36 r = 10% v = .40 S = 40 t = 90 days / 365 Ps S v2 2 ln + ( r + ) t (d1) = v t (d1) = - .3070 N(d1) = 1 - .6206 = .3794
Call Option Example What is the price of a call option given the following? P = 36 r = 10% v = .40 S = 40 t = 90 days / 365 (d2) = d1 - v t (d2) = - .5056 N(d2) = 1 - .6935 = .3065
Call Option Example What is the price of a call option given the following? P = 36 r = 10% v = .40 S = 40 t = 90 days / 365 OC = Ps[N(d1)] - S[N(d2)]e-rt OC = 36[.3794] - 40[.3065]e - (.10)(.2466) OC = $ 1.70
Put - Call Parity Put Price = Oc + S - P - Carrying Cost + Div. Carrying cost = r x S x t
Put - Call Parity Example ABC is selling at $41 a share. A six month May 40 Call is selling for $4.00. If a May $ .50 dividend is expected and r=10%, what is the put price?
Put - Call Parity Example ABC is selling at $41 a share. A six month May 40 Call is selling for $4.00. If a May $ .50 dividend is expected and r=10%, what is the put price? Op = Oc + S - P - Carrying Cost + Div. Op = 4 + 40 - 41 - (.10x 40 x .50) + .50 Op = 3 - 2 + .5 Op = $1.50