What is call option and put option with example


A call option , often simply labeled a "call", is a financial contract between two parties, the buyer and the seller of this type of option.

The seller or "writer" is obligated to sell the commodity or financial instrument to the buyer if the buyer so decides. The buyer pays a fee called a premium for this right. The term "call" comes from the fact that the owner has the right to "call the stock away" from the seller. Option values vary with the value of the underlying instrument over time.

The price of the call contract must reflect the "likelihood" or chance of the call finishing in-the-money. The call contract price generally will be higher when the contract has more time to expire except in cases when a significant dividend is present and when the underlying financial instrument shows more volatility.

Determining this value is one of the central functions of financial mathematics. The most common method used is the Black—Scholes formula. Importantly, the Black-Scholes formula provides an estimate of the price of European-style options. Adjustment to Call Option: When a call option is in-the-money i. Some of them are as follows:. Similarly if the buyer is making loss on his position i. Trading options involves a constant monitoring of the option value, which is affected by the following factors:.

If the stock price declines, the value of the put rises and you would sell the put for a profit. If the stock increases in price you may sell the put for a loss. A put option is a contract that gives you the right, but not the obligation, to sell a stock at a preset price. The price that you pay for a put option depends the duration of the contract the longer the duration, the more you pay and how far the current price of the stock is from the strike price of the contract.

Put buying is different from selling short. With a put option your only liability is the price you paid for the put. With a short sale, you have an unlimited downside liability if the stock goes up.

Also, the proceeds from selling short are in a margin account so you have to pay interest and meet margin requirements. Buying puts is a more conservative way of betting on a stock declining in price. Selling a Call For every buyer of a call there must be a seller, who assumes that the stock price will remain flat or go down. The seller collects the purchase price of the option but has the obligation to sell shares of the stock if the buyer decides to exercise the option. If the seller gets called - he must sell the stock.

If the stock continues to appreciate in price after the stock is sold, the seller looses the future price gain. In most cases you must own shares of the stock for each contract you sell - this is called a covered call.

Therefore, if your stock gets called away, you have the shares in your account. You can sell covered calls to generate a stream of income. If the stock price does not rise enough during the period of the contract, you won't get called and won't have to sell the stock so you keep the money you received when you sold the call.

If your broker lets you, you may sell "uncovered "or "naked" calls in a margin account. This practice lets you sell calls when you don't own the stock. If you get called, you must buy the stock at its current market value to cover the call even when the market price is higher than the strike price of the option.

Like any margin account transaction, you must execute the transaction immediately. The seller of a put collects the purchase price of the option from the buyer of the put. The seller has the obligation to buy shares at the strike price regardless of the market value of the underlying stock.

So if the put buyer decides to exercise the put contract, the seller of the put has to buy the shares at the strike price no matter the current market value of the stock. When you sell a put, you want the price of the stock to go up so you don't get the stock put to you - buy the stock for more than it's worth. Selling a put places the money you receive in a margin account so you pay interest on the proceeds until the put contract is closed. If you don't have the financial resources to cover the obligation of buying the stock from the buyer of the put, you sold "naked puts".

It tells about a trader who sold naked puts and experienced financial ruin. It was an unhedged bet, or what was called on Wall Street a "naked put" On October 27, , the market plummeted seven per cent, and Niederhoffer had to produce huge amounts of cash to back up all the options he'd sold at pre-crash strike prices.

He ran through a hundred and thirty million dollars - his cash reserves, his savings, his other stocks-and when his broker came and asked for still more he didn't have it. In a day, one of the most successful hedge funds in America was wiped out. Niederhoffer was forced to shut down his firm. He had to mortgage his house. He had to borrow money from his children.

He had to call Sotheby's and sell his prized silver collection Use calls and puts judiciously. If you're right, you can make quick money. If you're wrong, you can lose part or all of your investment very quickly. Do not sell "naked" options. You may be inviting a financial disaster.