IBM stock currently sells for 64 dollars per share. The implied volatility equals 40.0. The risk-free rate of interest is 5.5 percent continuously compounded. If you shorted an option on 100 shares of IBM stock with strike price 69 and maturity 9 months, how many shares of stock would you have to buy (sell) to create a delta-neutral hedge

Respuesta :

Answer:

53.19

Explanation:

$64 per share

Implied volatility = 40.0

risk-free rate of interest = 5.5%

number of shares shorted ( N ) = 100

strike price = 69

with maturity = 9 months

Calculate number of shares of stocks you have to be buy(sell) to create a delta-neutral hedge

we will apply the Black Scholes Formula

= N [ (ln(64/69) + (5.5%+(40%)^2 / 2) * (9/12)) / (40%* √(9/12)) ]

= N [ (ln(64/69) + (0.055+(0.40)^2 / 2) * (9/12)) / (0.40* √(9/12)) ]

= N * 0.5319

Number of shares to create a delta neutral hedge = 100 * 0.5319 =  53.19

The number of shares of stock that the person would have to buy in order to be able to create a delta-neutral hedge will be 53.19.

The following can be depicted from the question:

  • Implied volatility = 40.0
  • Risk-free rate of interest = 5.5%
  • Strike price = 69
  • Number of shares shorted = 100

Therefore, the number of shares to create a delta-neutral hedge will be:

= N[(In64/69) + (5.5% + (40%)² / 2) × (9/12) / (40% × ✓0.75)]

= N[(In0.9275) + (0.055 + 0.40)² / 2) × 0.75 / (0.40 × ✓0.75)

= N × 0.5319

= 100 × 0.5319

= 53.19

Therefore, the number of shares of stock is 53.19.

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