Vol "Volume" is the daily number of shares of a security that change hands between a buyer and a seller. Cette question ne se pose pas pour les actions gratuites".
In trading, we have the bid-ask spread which is the difference between what buyers are willing to pay and what sellers are asking for in terms of price. Ask "Ask" is the quoted ask, or the lowest price an investor will accept to sell a stock. Practically speaking, this is the quoted offer at which an investor can buy shares of stock; also called the offer price. Vol "Volume" is the daily number of shares of a security that change hands between a buyer and a seller.
Also known as volume traded. Open Int "Open Interest" is the total number of derivatives contracts traded that have not yet been liquidated either by an offsetting derivative transaction or by delivery. Root Strike "Strike" is the index value at which the buyer of the option can buy or sell the underlying stock index. The strike index is converted to a dollar value by multiplying by the option's contract multiple.
The agreed upon price is called the strike price. American options can be exercised any time before the expiration date of the option, while European options can only be exercised on the expiration date exercise date.
Exercising means utilizing the right to buy or the sell the underlying security. Option on stocks typically represent shares. In terms of speculation, option buyers and writers have conflicting views regarding the outlook on the performance of an underlying security. An option writer who sells a call option believes that the underlying stock's price will drop or stay the same relative to the option's strike price during the life of the option, as that is how they will reap maximum profit.
The writer's maximum profit is the premium received when selling the option. If the buyer is right, and the stock rises above the strike price, the buyer will be able to acquire the stock for a lower price strike price and then sell it for a profit at the current market price. Risk to the call buyer is limited to the premium paid for the option, no matter how much the underlying stock moves.
The profit at expiration, if applicable, is: This will give the total profit or loss to the trader in dollars.
The risk to the call writer is much greater. Their maximum profit is the premium received, but they face infinite risk because the stock price could continue to rise against them. To offset this risk, many option writers use covered calls. A trader who expects a stock's price to increase can buy a call option to purchase the stock at a fixed price " strike price " at a later date, rather than purchase the stock outright.
The cash outlay on the option is the premium. The trader would have no obligation to buy the stock, but only has the right to do so at or before the expiration date. The risk of loss would be limited to the premium paid, unlike the possible loss had the stock been bought outright. The holder of an American-style call option can sell his option holding at any time until the expiration date, and would consider doing so when the stock's spot price is above the exercise price, especially if he expects the price of the option to drop.
By selling the option early in that situation, the trader can realise an immediate profit. Alternatively, he can exercise the option — for example, if there is no secondary market for the options — and then sell the stock, realising a profit. A trader would make a profit if the spot price of the shares rises by more than the premium. For example, if the exercise price is and premium paid is 10, then if the spot price of rises to only the transaction is break-even; an increase in stock price above produces a profit.
If the stock price at expiration is lower than the exercise price, the holder of the options at that time will let the call contract expire and only lose the premium or the price paid on transfer. A trader who expects a stock's price to decrease can buy a put option to sell the stock at a fixed price "strike price" at a later date. The trader will be under no obligation to sell the stock, but only has the right to do so at or before the expiration date.
If the stock price at expiration is below the exercise price by more than the premium paid, he will make a profit. If the stock price at expiration is above the exercise price, he will let the put contract expire and only lose the premium paid. In the transaction, the premium also plays a major role as it enhances the break-even point.
For example, if exercise price is , premium paid is 10, then a spot price of to 90 is not profitable. He would make a profit if the spot price is below It is important to note that one who exercises a put option, does not necessarily need to own the underlying asset. Specifically, one does not need to own the underlying stock in order to sell it. The reason for this is that one can short sell that underlying stock. A trader who expects a stock's price to decrease can sell the stock short or instead sell, or "write", a call.
The trader selling a call has an obligation to sell the stock to the call buyer at a fixed price "strike price".
If the seller does not own the stock when the option is exercised, he is obligated to purchase the stock from the market at the then market price. If the stock price decreases, the seller of the call call writer will make a profit in the amount of the premium. If the stock price increases over the strike price by more than the amount of the premium, the seller will lose money, with the potential loss being unlimited. A trader who expects a stock's price to increase can buy the stock or instead sell, or "write", a put.
The trader selling a put has an obligation to buy the stock from the put buyer at a fixed price "strike price". If the stock price at expiration is above the strike price, the seller of the put put writer will make a profit in the amount of the premium. If the stock price at expiration is below the strike price by more than the amount of the premium, the trader will lose money, with the potential loss being up to the strike price minus the premium.
Combining any of the four basic kinds of option trades possibly with different exercise prices and maturities and the two basic kinds of stock trades long and short allows a variety of options strategies. Simple strategies usually combine only a few trades, while more complicated strategies can combine several. Strategies are often used to engineer a particular risk profile to movements in the underlying security.
For example, buying a butterfly spread long one X1 call, short two X2 calls, and long one X3 call allows a trader to profit if the stock price on the expiration date is near the middle exercise price, X2, and does not expose the trader to a large loss. Selling a straddle selling both a put and a call at the same exercise price would give a trader a greater profit than a butterfly if the final stock price is near the exercise price, but might result in a large loss.
Similar to the straddle is the strangle which is also constructed by a call and a put, but whose strikes are different, reducing the net debit of the trade, but also reducing the risk of loss in the trade.
One well-known strategy is the covered call , in which a trader buys a stock or holds a previously-purchased long stock position , and sells a call. If the stock price rises above the exercise price, the call will be exercised and the trader will get a fixed profit. If the stock price falls, the call will not be exercised, and any loss incurred to the trader will be partially offset by the premium received from selling the call.
Overall, the payoffs match the payoffs from selling a put. This relationship is known as put-call parity and offers insights for financial theory. Another very common strategy is the protective put , in which a trader buys a stock or holds a previously-purchased long stock position , and buys a put. This strategy acts as an insurance when investing on the underlying stock, hedging the investor's potential loses, but also shrinking an otherwise larger profit, if just purchasing the stock without the put.
The maximum profit of a protective put is theoretically unlimited as the strategy involves being long on the underlying stock. The maximum loss is limited to the purchase price of the underlying stock less the strike price of the put option and the premium paid. A protective put is also known as a married put. Another important class of options, particularly in the U. Other types of options exist in many financial contracts, for example real estate options are often used to assemble large parcels of land, and prepayment options are usually included in mortgage loans.
However, many of the valuation and risk management principles apply across all financial options. There are two more types of options; covered and naked. Options valuation is a topic of ongoing research in academic and practical finance. In basic terms, the value of an option is commonly decomposed into two parts:. Although options valuation has been studied at least since the nineteenth century, the contemporary approach is based on the Black—Scholes model which was first published in The value of an option can be estimated using a variety of quantitative techniques based on the concept of risk neutral pricing and using stochastic calculus.
The most basic model is the Black—Scholes model. More sophisticated models are used to model the volatility smile. These models are implemented using a variety of numerical techniques.