Unsourced material may be challenged and removed. The purchase of a put option is interpreted as a negative sentiment about the future value option spread trading pdf the underlying.
The term “put” comes from the fact that the owner has the right to “put up for sale” the stock or index. Put options are most commonly used in the stock market to protect against the decline of the price of a stock below a specified price. In this way the buyer of the put will receive at least the strike price specified, even if the asset is currently worthless. The put yields a positive return only if the security price falls below the strike when the option is exercised.
If the option is not exercised by maturity, it expires worthless. The most obvious use of a put is as a type of insurance. Another use is for speculation: an investor can take a short position in the underlying stock without trading in it directly. The writer sells the put to collect the premium. The put writer’s total potential loss is limited to the put’s strike price less the spot and premium already received. That is, the buyer wants the value of the put option to increase by a decline in the price of the underlying asset below the strike price.
That is, the seller wants the option to become worthless by an increase in the price of the underlying asset above the strike price. This strategy is best used by investors who want to accumulate a position in the underlying stock, but only if the price is low enough. If the buyer fails to exercise the options, then the writer keeps the option premium as a “gift” for playing the game. The seller’s potential loss on a naked put can be substantial. The potential upside is the premium received when selling the option: if the stock price is above the strike price at expiration, the option seller keeps the premium, and the option expires worthless. If the stock price completely collapses before the put position is closed, the put writer potentially can face catastrophic loss. The put buyer does not need to post margin because the buyer would not exercise the option if it had a negative payoff.
Payoff from buying a put. Payoff from writing a put. A buyer thinks the price of a stock will decrease. He pays a premium which he will never get back, unless it is sold before it expires. The buyer has the right to sell the stock at the strike price. The writer receives a premium from the buyer. If the buyer exercises his option, the writer will buy the stock at the strike price.