How to Trade Gold Options Using Theta

Here's how Theta can power profits on options trades on SPDR Gold Shares.
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The following article was written by J.W. Jones, an independent options trader who contributes to Chris Vermeulen's Web site TheGoldAndOilGuy.com

NEW YORK (

TheStreet

) -- In a previous article, "

Learning How to Profit from Theta When Trading SPX Options

," I discussed the basics of the famed options Greek, Theta.

A fundamental knowledge of Theta is imperative in order to understand the mechanics and construction of options strategies. In many cases, Theta is either the profit engine or the means by which experienced options traders reduce the cost of opening a new position. Theta can even take an exchange-traded fund ETF that pays no dividend and create a monthly income stream utilizing a technique known as a covered-call write.

The most exciting thing about options is their versatility. You can trade them in so many different ways. A trader can define a position's risk with unbelievable precision. When traded properly utilizing hard stops, options offer traders opportunities that stocks and futures simply cannot provide. Theta allows option traders to write spreads which generally offer nice returns with very limited risk.

Theta is the fundamental reason behind the slow and relentless deterioration of options values over time. As a series of options gets closer to expiration, Theta becomes a very powerful force. As stated in the previous article, the final two weeks of options expiration put Theta into overdrive. The two charts below (courtesy of Optionsuniversity) illustrate the rapid decay of Theta.

The charts illustrate effectively that option contracts that are out of the money and consist entirely of time premium decline rapidly in value on their way to 0. Although Theta must be respected, it is Theta's relationship with implied volatility that really makes it a force that must be monitored closely.

While I will not discuss implied volatility in this article, in future articles it will gain considerable attention. Implied volatility is paramount in every decision that an options trader makes. Ignoring implied volatility and Theta is a recipe for disaster, the kind of disaster where an entire trading account is wiped out in less than 30 days. In most of the trades that I place, Theta is regularly a profit engine. I never purchase options naked. In every options trade that I construct I am utilizing some form of a spread in order to mitigate the ever-present wasting away of time premium. In many cases, Theta is the driving force behind my profitability.

In any other case, Theta decreases the cost for me to purchase options, allowing me to minimize my risk to an acceptable level. Vertical spreads come in two variations: debit spreads and credit spreads. A vertical spread is a multilegged option trade that involves more than one strike price.

As an example, let's assume the

SPDR Gold Shares

(GLD) - Get Report

is trading around $119/share. If I had placed a call credit spread trade at the close on Thursday I could have sold the GLD August 120 call strike and purchased the GLD August 121 call strike, thus receiving a credit in my account.

At current prices as I type, the August 120 call strike would have resulted in a credit to my trading account of $53 dollars while the August 121 call strike would have resulted in a debit in my account of $29 dollars with a one-lot position size.

I would have placed this trade if I had had a strong feeling that the price of GLD was going to decline. The reason this trade is called a vertical credit spread is because the total trade results in a credit to my account of $24 dollars less commissions. The vertical aspect of the trade is based on the arrangement of the positions on the options board, also called an option chain.

When an options trader places a credit spread, he or she is relying on time decay, Theta, to create profits. In many cases, options traders will utilize vertical spreads to play a directional bias. In the example above, the bias on GLD would be to the downside.

However, the maximum amount I could lose would be limited because I purchased the 121 call. The most I could lose would be $100 dollars minus the credit of $24 dollars. Thus, the worst case scenario for this call credit spread would be a loss of $76 dollars for every contract I had put on. If I had put on five contracts, my loss would have been limited to $380 dollars plus commissions.

A call debit spread is constructed in exactly the opposite direction. If I believed that gold was going to increase in value I could buy one August 120 GLD call for $53 dollars and sell one August GLD 121 call for $29 dollars. Notice that the sale of the GLD 121 call would reduce the cost of the GLD 120 call. By selling the GLD 121 call, I would reduce the cost of this spread down to $26 dollars. However, my maximum gain would be limited to $74 dollars minus commissions. The point of this illustration is more to focus on the way Theta helps option traders in practical situations.

When an options trader utilizes a credit spread, Theta operates as the profit engine. When an options trader does the exact opposite by placing a debit spread, Theta acts to reduce the overall cost of the spread reducing the overall risk exposure. As one can see, understanding Theta is crucial when trading options. While vertical spreads are very basic, they can provide nice returns while having the unique ability to control risk with an extremely tight leash.

In future articles, we will dissect the various option trading strategies which option traders can utilize in different situations, at different points within the options expiration cycle. While this article will conclude the basic overview of Theta, future articles will discuss intimately the key relationship that Theta and implied volatility share. In closing, I will leave you with the famous saying of Benjamin Franklin, "Time is money."