Stock Option Trading

Spread trading is a useful technique that can be used to profit in bullish, neutral or bearish conditions. It basically functions to limit risk at the cost of limiting profit as well.

Spread trading is the process of opening a position by buying and selling the same type of option (ie. Call or Put) at the same time. For example, if you buy a call option for stock XYZ, and sell another call option for XYZ, you are in fact spread trading.

By buying one option and selling another, you limit your risk, since you know the exact difference in either the expiration date or strike price (or both) between the two options. This difference is known as the spread, hence the name of this spread treading technique.

VERTICAL SPREADS

A Vertical Spread is a spread where the two options (the one you bought, and the one you sold) have the same expiration date, but differ only in strike price. For example, if you bought a $60 June Call option and sold a $70 June Call option, you have created a Vertical Spread.

Let's assume we have a stock XYZ that's currently priced at $50. We think the stock will rise. However, we don't think the rise will be substantial, maybe just a movement of $5.

We then kick off a Vertical Spread on this stock. We Buy a $50 Call option, and Sell a $55 Call option. Let's assume that the $50 Call has a premium of $1 (since it's just In-The-Money), and the $55 Call has a premium of $0.25 (since it's $5 Out-Of-The-Money).

So we pay $1 for the $50 Call, and earn $0.25 off the $55 Call, giving us a total cost of $0.75.

2 things can happen. The stock can either rise upwards, as predicted, or drop down below the current price. Let's look at the 2 scenarios:

Scenario 1: The price has dropped to $45. We have made a big mistake and predicted the wrong price movement. However, since both Calls are Out-Of-The-Money and will expire worthless, we don't have to do anything to Close the Position. Our loss would be the $0.75 we spent on this spread trading exercise.

Scenario 2: The price has risen to $55. The $50 Call is now $5 In-The-Money and has a premium of $6. The $55 Call is now just In-The-Money and has a premium of $1. We can't just wait till the expiration date, because we have sold a Call that's not covered by stocks we own (ie. a Naked Call). We therefore need to Close our Position before the expiration date.

So we need to sell the $50 Call which we bought earlier, and buy back the $55 Call that we sold earlier. So we sell the $50 Call for $6, and buy the $55 Call back for $1. This transaction has earned us $5, resulting in a nett gain of $4.25, taking into account the $0.75 we spent earlier.

So what happens if the price of the stock jumps to $60 instead?

Here's where the - limited risk / limited profit - expression comes in. At a price of $60, the $50 Call would be $10 In-The-Money and would have a premium of $11. The $55 Call would be $5 In-The-Money and would have a premium of $6. Closing the position will still give us $5, and still give us a nett gain of $4.25.

Once both Calls are In-The-Money, our paper profit will always be limited by the difference between the strike prices of the 2 Calls, minus the amount we paid at the start.

As a rule, once the stock value goes up above the lower Call (the $50 Call in this example), we start to earn profit. And when it goes above the higher Call (the $55 Call in this example), we reach our maximum profit.

So why would we want to perform this type of Spread?

If we had just done a simple Call option, we would have had to spend the $1 required to buy the $50 Call. In this spread trading exercise, we only had to spend $0.75, hence the - limited risk - expression. So you are risking less, but you will also profit less, since any price movement beyond the higher Call will not earn you any more profit. Hence this strategy is suitable for moderately bullish stocks.

HORIZONTAL SPREADS

We now take a look a Horizontal Spreads. Horizontal Spreads, otherwise known as Time Spreads or Calendar Spreads, are spreads where the strike prices of the 2 options stay the same, but the expiration dates differ.

To recap: Options have a "Time Valu"e associated with them. Generally, as time progresses, an option's premium loses value. In addition, the closer you get to expiration date, the faster the value drops.

This spread takes great advantage of this premium decay.

Let's look at an example. Let's say we are now in the middle of June. We decide to perform a Horizontal Spread on a stock. For a particular strike price, let's say the August option has a premium of $4, and the September option has a premium of $4.50.

To initiate a Horizontal Spread, we would Sell the nearer option (in this case August), and buy the further option (in this case September). So we earn $4.00 from the sale and spend $4.50 on the purchase, netting us a $0.50 cost.

Let's fast-forward to the middle of August. The August option is fast approaching its expiration date, and the premium has dropped fairly drastically, say down to $1.50. However, the September option still has another month's room, and the premium is still holding steady at $3.00.

At this point, we would want to close the spread position. We buy back the August option for $1.50, and sell the September option for $3.00. That gives us a profit of $1.50. When we deduct our initial cost of $0.50, we are left with a profit of $1.00.

That is basically how a Horizontal Spread works. The same technique can be used for Puts as well.