The synthetic short futures is an options strategy used to simulate the payoff of a short futures position. It is entered by selling at-the-money call options and buying an equal number of at-the-money put options of the same underlying futures and expiration date.
|Synthetic Short Futures Construction|
|Buy 1 ATM Put|
Sell 1 ATM Call
This is an unlimited profit, unlimited risk futures options position that can be constructed to hedge a long futures position, often as a means to profit from an arbitrage opportunity. The synthetic short futures strategy is also used when the futures trader is bearish on the underlying futures but seeks an alternative to selling the futures outright.
Similar to a short futures position, there is no maximum profit for the synthetic short futures. The options trader stands to profit as long as the underlying futures price goes down.
The formula for calculating profit is given below:
Like the short futures position, heavy losses can occur for the synthetic short futures if the underlying futures price shoots upwards.
The formula for calculating loss is given below:
The underlier price at which break-even is achieved for the synthetic short futures position can be calculated using the following formula.
Suppose June Crude Oil futures is at $40 and each contract covers 1000 barrels of Crude Oil. An options trader enters a synthetic short futures position by buying a JUN Crude Oil 40 put for $5100 and selling a JUL 40 call for $4800. The net credit taken to enter the trade is $300.
If June Crude Oil futures rallies and is trading at $50 on option expiration date, the long JUN 40 put will expire worthless but the short JUN 40 call expires in the money and has an intrinsic value of $10000. Buying back this short call will require $10000 and subtracting the initial $300 credit taken when entering the trade, the trader's net loss comes to $9700. Comparatively, this is very close to the net loss of $10000 for the short futures position.
If June Crude Oil futures is instead trading at $30 on option expiration day, then the short JUN 40 call will expire worthless while the long JUN 40 put will expire in the money and be worth $10000. Including the initial $300 credit received on entering the trade, the trader's profit comes to $10300. This amount closely approximates the $10000 gain of the corresponding short futures position.
Some novice futures traders mistakenly believe that the synthetic short futures strategy requires very little upfront investment. They assumed that by trading options instead of futures, they can avoid posting the margin. Unfortunately, the short call position is subjected to the same margin requirements as a long futures position. Hence, the synthetic short futures position requires more or less the same upfront investment as a regular short futures position.
There is a less aggressive version of this strategy where both the call and put options involved are out-of-the-money. While a larger downside movement of the underlying futures price is required to make large profits, this split strikes strategy does provide more room for error.
The converse strategy to the synthetic short futures is the synthetic long futures, which is used when the options trader is bullish on the underlying but seeks an alternative to purchasing the futures itself.
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