Any time trading options for stock (or futures for commodities including forex), one of the key risk analysis resources available is Delta. This sole way of measuring can have an important affect how well you have done relating to risk and return.
Evaluating Prospective Returns and Measuring Risk
In brief, Delta tells us two things. The very first is how much, at that given price, every $1 upward move will impact the cost of the actual option contact. For example, if the option in question has a Delta of 0.33, then when the underlying asset increases by $1.00, the price of the option should rise $0.33. This allows us to determine the return value of an alternative. The lower the Delta, the lower our return will be. The aim is to find options that are trading at as high a delta as feasible, although this generally means considering deep in-the-money options as opposed to less costly, out-of-the-money options.
The second crucial piece of info Delta shows us any time trading options is what amount of the gains/losses we control. For example, at a Delta of 0.33, we control 33 units of the underlying asset. How this helps us is to work out how we can hedge our risk. If we own two options with a delta of 0.33, we might be able to offset our risk by purchasing or owning the quantity of the underlying asset. In this instance, if we wrote 2 naked Call options Stock XYZ, to cancel out the risk of having to produce the asset, we should own 66 shares of XYZ.
Considerations That Impact Delta
Of course, as the amount of the asset persists to move in a given direction, the Delta will alter (we can measure how much of an impact this will have through Gamma). Also, as time passes the time premium of the alternative will begin to erode (and thereby affect Theta, another measurement). This means that, the Delta of an alternative is never at standstill.
Using Delta when trading options is typically the starting position for anyone who is looking at an options position in an asset. To reiterate, the lower the delta, the low the possibility return/risk. The higher the delta, the higher the price. Lots of people trading options can survive simply by understanding how Delta works, although there are other “Greeks” that prove invaluable in this arena.
Summary – Optimal Delta-Based Trades
For investors trading alternatives on the buy side the only way to enjoy a higher Delta and thereby control a higher percentage of the gains, is to purchase deep in-the-money options. There are still benefits to this. For example, where a stock is trading at $100, having control of 0.998 (virtually 1) of the returns/losses might mean buying the $70 options. As opposed to having to think of the full $100, you will develop $30 plus a small premium.
With regard to investors on the writing side, selling higher delta options will almost certainly lead to the position being filled at expiry. If your naked on a deal, this becomes problematic. If your covered, the position will liquidate and you will liquidate at less than the market price. Ideally, the alternative premium would compensate for this, but this is not forever the situation.
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