Opció belső és időértéke, put-call paritás

Opciós ár képlete

Bonds Definition of options Options are contracts granting the right to the option holder buyer to sell or buy an underlying security at an agreed-upon price strike price on a specific future date.

opciós ár képlete

In other words: options give the option to the buyer to sell or buy an underlying. In the same time, options generate an obligation to the seller of the option.

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There are two types of options: call buy and put sell. A call option offers the buyer the right, but not the obligation to buy. On the contrary, a put option offers the buyer the right but not the obligation to sell.

opciós ár képlete

Another way to categorise options is the time when the option can be exercised. There are two main styles: European and American.

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European-style options can be exercised only at maturity, which is a specific future date. American-style options can be exercised any opciós ár képlete between the time of purchase and maturity date. The underlying security or asset is the instrument, which the option grants the right to sell or buy.

opciós ár képlete

The maturity or expiration date is the date when or until the option can be exercised. The strike price of the option is the agreed-upon price of the underlying. The actual market price of the underlying at maturity does not matter. Options can be categorised based on their market as well.

Tartalomjegyzék

On the stock exchange, option contracts are standardised in terms of underlying, maturity, and strike price. Options with underlying of stock exchange indexes are the most well known. The value of an option at expiry equals to the amount exchanged if the option is exercised. If the option does not worth to exercise, its value will be zero. Therefore, the value of a buy option is either the difference between the price of the underlying and the strike price or zero the difference between the two prices is negative.

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On the contrary, the value of a sell option is either the difference between the strike price and the price of the underlying or zero the difference between the two prices is negative. Before maturity, the value of the option depends on what type of option it is. However, analytic approach cannot be used for American options, valuation opciós ár képlete only possible with numeric methods. Opciós ár képlete most well-know numeric method is the Binomial model.

Opciós szintkereskedési stratégia

Premium of an option The value of an option can be divided into two factors: extrinsic time value and intrinsic value. Intrinsic value is the amount an option would worth if it was exercised today price of underlying - strike price. Time value makes up the remaining part: value of the option - time value.

opciós ár képlete

At maturity, the time value is zero and the value of the opciós ár képlete equals to the intrinsic value. In the Money ITM options have intrinsic values.

opciós ár képlete

In case of a Call option it means that the price of the underlying is higher than the strike price. For Put options it is the opposite: the price of the underlying is lower than the strike price.

At the Money ATM is when the price of the underlying equals to the strike price. Out of the Money OTM options have no intrinsic values: for Call options the strike price is higher than the price of the underlying and for Put options it is the opposite: the strike price is lower than the price of the underlying.

opciós ár képlete

The Black-Scholes option pricing model relies on this value as well. The calculation requires the following variables: spot price, exercise price strike pricerisk-free interest rate, and time to expiry. This is directly observable from the price of the options.