01 Week Flashcards
What is an option
Right to buy/sell an asset in the future at some predetermined price
What is a strike or exercise price X?
Price at which underlying can be bought or sold
What is a maturity or expiration date?
Date the option matures
What is an American option
Exercise possible any time until expiration
What is an European option
Exercise possible at expiration only
What is a Call option?
Call options give you the right to buy
What is a Put option?
Put options give you the right to sell
What is the exercise gain of a call?
max[0 , S-X]
What is the exercise gain of a put?
max[0, X-S]
Profit of the buyer (long) is equal to …
… the loss of the seller (short)
What is the Put-call-parity
S-B = C-P
What are the assumptions of the One-step Binomial Model
Assumptions:
- Stock price S follows multiplicative binomial process
- Trading occurs only at discrete times
Which relationships must hold in a market equilibrium?
1+r_f > d
u > 1+ r_f
r_f: risk-free rate
d: multiplicative downward movement in the stock price
u: multiplicative upward movement in the stock price
How can p in the Binomial Model be interpreted
p can be interpreted as a probability for the upward movement in a world with risk-neutral investors.
p is called the risk-neutral probability.
In real world q lager then p.
How is p called?
p is called the risk-neutral probability