Option is a legal agreement between buyer and seller to buy or sell security at an agreed price in a certain period of time. It is quite similar to insurance that you pay an amount of money in order that your property is protected by the insurance company. The difference between these two is option can be traded whereas, insurance policy cannot be traded. There are two types of option contracts; call options and put options. We buy call option when we expect the security price will go up and buy put option when we expect the security price will go down. We also can sell call option if we expect the security price will go down and vice versa if we sell put option. Usually, option is counted by contract, one contract equivalent to 100 unit options. 1 unit option protects 1 unit share. So, one contract protects 100 unit shares. Before learning how to trade option, terminologies that you need to know are as follow: a)Strike price: Strike price is the price that is agreed by both buyer and seller of the option to deal with. That means if the strike price of the call option is 35, seller of this option obligates to sell security at this price to the buyer of this option even though the market price of the security is higher than 35 if the buyer exercises the option. Buyer of this option can buy a security with a price that is lower than the market price. If the current market price is $39, the buyer will earn $4. If the security price is lower than the strike price, buyer will hold the option and leave the option to expire worthless. For put option strike price, buyer of the option has the right to sell the security at the strike price to the seller of the option. That means if the put option strike price is 30, seller of this option obligates to buy the security at this price from the buyer if he or she exercises the option even though the market price is lower than this price. If the market is $25, the option buyer will earn $5. It looks like a lot of transactions have been involved; but actually, seller of the option will not buy a security and sell it to the buyer. The broker firm will do all the transaction but the extra money that has used to buy the security has to be paid by the seller. This means, if the seller loss $4, the buyer will earn $4. b)Out of the money, in the money and near/at the money option: Option price comprises of time value and intrinsic price.

Time Value + Intrinsic Value = Option Price

Time value is the amount of money that the option worth due to the time the option has until its expiration date. Longer the time the option has until its expiration date, higher the time value of this option. Time value of an option will become zero if the option has expired. Intrinsic value for in the money call option is the difference between current market security price and option strike price. Conversely, in the money put option's intrinsic value is the difference between option strike price and current market security price. If the current security price is lower than the call option strike price, this option is an out of the money option. It only has time value. Call option with strike price that is lower than the current market security price is an in the money option. This option has time value and also intrinsic value. Near or at the money option is the option, which strike price is close to the current market security price. c)Delta value: Delta value shows the amount of the option price will change when the security price changes by $1.00. It is a positive value for call option and negative value for put option. It ranges from 0.1 to 1.0. Delta value for in the money option is more than 0.5 and out of the money option is less than 0.5. Delta value for deep in the money option usually is more than 0.9. If the option delta value is 0.6, meaning that when the security price goes up $1, option price will go up $0.60. If the security price goes up $0.10, the option price will goes up $0.06. Usually, $0.06 will round up to $0.10. d)Theta value: Theta value is a negative value, which shows the decay of the option time value. Option, which has longer time to expiry, has lower absolute theta value than option, which has shorter time to expiry. High absolute theta value means the option time value decays more than the low absolute theta value option. A theta value of -0.0188 means that the option will lose $0.0188 in its premium after passage of seven days. Options with a low absolute theta value are more preferable for purchase than those with high absolute theta value. e)Gamma value: Gamma value shows the change of the delta value of an option when the security price increases or decreases. For an example, gamma value of 0.03 indicates that the delta value of this option will increase 0.03 when the security price goes up $1. Option, which has longer time to expiry, has lower value of gamma than option, which has shorter time to expiry. The gamma value also changes significantly when the security price moves near the option strike price. f)Implied volatility: Implied volatility is a theoretical value, which is used to represent the volatility of a security price. It is calculated by substituting actual option price, security price, option strike price and the option expiration date into the Black-Scholes equation. Options with a high volatility stocks are cost more than those with low volatility. This is because high volatility stock option has a greater chance to become in the money option before its expiration date. Most purchasers prefer high volatility stock options than the low volatility stock options.



Actually, there are twenty-one option trading strategies, which most of the option investors and traders use in their daily trading. However, I'm only introducing four strategies as follow: a)Call or put spread b)Straddle c)Covered call d)Butterfly spread

Call and put spread is established by buying in the money or near the money option and selling out of the money option. When the security price goes up, in the money call option that you buy will generate profit and the out of the money option that you sell will loss money. However, due to the difference of the delta value, when the security price goes up, in the money call option price goes up with a higher rate compared to the out of the money call option. When you deduce the profit from the loss, you still earn money. The purpose of selling the out of the money option is to protect the depreciation of time value of in the money call option, if the security price goes down. However, if the security price continuously goes down, this will cause an unlimited loss. Therefore, stop loss has to be set at certain level. This strategy also has a maximum profit that is when security price has crossed over in the money option strike price. Straddle can earn money no matter the security price goes up or down. This strategy is established by buying near the money call and put option at the same strike price. The disadvantage of this strategy is the high breakeven level. The sum of the call and put option ask price is the breakeven level of this strategy. You only generate profit when the security price has gone up or down more than the breakeven level. If the security price fluctuates within the upside and downside breakeven level, you still loss money. The money that you loss is due to the depreciation of the option time value. This strategy is usually applied for the security, which has high volatility or before the release of the earning report. The maximum loss of this strategy is the total amount of call and put option price. This strategy can generate unlimited profit at either side of the market direction Covered call is established by buying a security at the current market ask price and selling out of the money call option. Selling out of the money option has limited the profit that generated from this strategy. If security price continuously goes down, it will cause an unlimited loss. Therefore, stop loss must be set. When the option has comes to its expiry, if the security price is not moving up significantly, you still earn the total option premium that you have received. If the security price goes up, sure you will earn a limited profit. If the stock price continuously goes down, it will cause an unlimited loss. Therefore, stop loss must be set. Usually, stop loss is set at the security ask price after subtracting by the option bid price. If this security price goes down and passes over the price that you set as stop loss, the loss that is incurred to you is about half of the total option premium that you have received. This is because the delta value of the out of the money call option that you have sold is about 0.4 - 0.5. The out of the money call option strike price must be the closest strike price to the entering security price. Butterfly spread strategy is quite similar to the condor strategy. It has also four combinations that are long at the money call and put butterfly spread and short at the money call and put butterfly spread. Long at the money call and put butterfly spread are for stationary market and short at the money call and put butterfly spread are for volatile market. Steps that involve in long at the money call butterfly spread are buying in the money and out of the money call option and following selling at the money call option. At the money option means the strike price of this option is quite close to the current market security price. Number of contract of the at the money call option must double the number of contract of in and out of the money option. Profit can be generated as long as the security price does not move out from the upside and downside breakeven range. The upside breakeven level is calculated by adding the total pay out of this position to the highest strike price. The downside breakeven level is calculated by subtracting the lowest strike price with the total pay out of this position. The short at the money call butterfly spread is established by selling in and out of the money call option and following by buying at the money call option. Number of contract of at the money option must be double the number of contract of in and out of the money option. As long as the security price has move out the upside and downside breakeven range, profit can be generated. This strategy generates limited profit and also cause limited loss if the security price does not go to the right direction. With these four strategies, you can use to earn money from upside and downside market and also the market that trades sideway.