What is an 'Up-And-Out Option'

A up-and-out option is a type of knock-out barrier option that ceases to exist when the price of the underlying security rises above a specific price level, called the barrier price. If the price of the underlying does not rise above the barrier level, the option acts like any other option giving the holder the right but not the obligation to exercise their call or put option at the strike price on or before the expiration date specified in the contract.

BREAKING DOWN 'Up-And-Out Option'

Considered an exotic option, an up-and-out option is one of two types of knock-out barrier options, the other being an down-and-out option. Both kinds come in put and call varieties. A barrier option is a type of option where the payoff, and the very existence of the option, depends on whether or not the underlying asset reaches a predetermined price. A barrier option can be a knock-out. A knock-out means it expires worthless if the underlying reaches a certain price, limiting profits for the holder and limiting losses for the writer. The barrier option can also be a knock-in. As a knock-in, it has no value until the underlying reaches a certain price.

The critical concept is if the underlying asset reaches the barrier at any time during the option's life, the option is knocked out, or terminated, and will not come back into existence. It does not matter if the underlying moves back to pre-knock-out levels.

For example, an up-and-out option has a strike price of 80 and a knock-out price of 100. At the option's inception, the price of the stock was 75, but before the option was exercisable, the price of the stock reached 100. This valuation means the option automatically expires worthless no matter where the underlying trades before the exercise date.

A up-and-out option can be a call or put. Both get knocked out if the underlying rises above the barrier price.

For a down-and-out option, if the underlying falls below the barrier price, then the option ceases to exist. Both calls and puts cease to exist if the underlying falls to its barrier price.

Using Up-and-Out Options

Large institutions or market markers create these options by direct agreement, for the primary reason that valuing them is a complex undertaking. For example, a portfolio manager can use them as a less expensive method to hedge against losses on a short position. The hedge would be less costly than buying vanilla call options. However, it would be imperfect since the buyer would be unprotected if the security price increased above the barrier price.

Pricing depends on all the regular options metrics with the knock-out feature adding an extra dimension. European style expirations, where the exercise may only happen at the expiration date, are complicated enough. However, an American style option, where the holder may exercise the option at any time on or before expiration, is even more complicated.

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