Ralph Elliott: The Double Diagonal: A Non-Directional Income Strategy

The double diagonal spread is an advanced, non-directional options strategy that is designed to profit from the passage of time and a lack of movement in the underlying asset. This strategy, which is essentially a combination of a short call diagonal spread and a short put diagonal spread, creates a range-bound position with a high probability of profit. While the double diagonal is more complex than a standard diagonal spread, it can be a effective tool for generating consistent income in a sideways market.

Constructing a Double Diagonal Spread

A double diagonal spread is constructed by selling a near-term out-of-the-money call and put, and buying a longer-term, further out-of-the-money call and put. The resulting position has a similar risk profile to an iron condor, but with the added dimension of different expiration dates. The short, near-term options are the primary source of profit, as they will decay more rapidly than the long, longer-term options.

The Risk Profile of a Double Diagonal

The risk profile of a double diagonal is characterized by a wide profit range between the two short strikes. The maximum profit is realized if the underlying asset is trading between the short strikes at the expiration of the near-term options. The maximum loss is limited and is defined by the distance between the call strikes (or the put strikes) minus the net credit received when establishing the position.

Ideal Market Conditions

The double diagonal spread is best suited for a market where the trader expects the underlying asset to trade in a well-defined range. This strategy is particularly effective in low-volatility environments, as the primary source of profit is time decay. The goal is for the underlying asset to remain between the short strikes, allowing the near-term options to expire worthless.

Managing the Position

Managing a double diagonal spread requires a bit more finesse than a standard diagonal. The call and put sides of the spread can be managed independently. If the underlying asset moves towards one of the short strikes, the trader can adjust that side of the spread by rolling it to a different strike or a later expiration. The key is to keep the underlying asset within the profit range.

The Impact of Volatility

Implied volatility has a significant impact on a double diagonal spread. An increase in implied volatility will generally hurt the position, as it will increase the value of the short options. Conversely, a decrease in implied volatility will generally help the position. For this reason, it is often best to enter a double diagonal spread when implied volatility is high and expected to decrease.

A Step-by-Step Example

Let's consider a stock trading at $100. A trader could construct a double diagonal spread by selling a 30-day 105 call and a 30-day 95 put, and buying a 60-day 110 call and a 60-day 90 put. This would create a position with a profit range between $95 and $105. If the stock is trading between these two prices at the 30-day expiration, the short options will expire worthless, and the trader will realize a profit. The long options, which still have 30 days of life left, can then be used as the basis for a new double diagonal spread.

By understanding the construction, risk profile, and management techniques of the double diagonal spread, traders can add a effective non-directional income strategy to their arsenal. This strategy is not for beginners, but for those with the experience and discipline to manage it effectively, the double diagonal can be a consistent and reliable source of profits.