Buying Aluminum Put Options to Profit from a Fall in Aluminum Prices

If you are bearish on aluminum, you can profit from a fall in aluminum price by buying (going long) aluminum put options.

Example: Long Aluminum Put Option

You observed that the near-month LME Aluminum futures contract is trading at the price of USD 1,470 per tonne. A LME Aluminum put option with the same expiration month and a nearby strike price of USD 1,500 is being priced at USD 98.00/ton. Since each underlying LME Aluminum futures contract represents 25 tonnes of aluminum, the premium you need to pay to own the put option is USD 2,450.

Assuming that by option expiration day, the price of the underlying aluminum futures has fallen by 15% and is now trading at USD 1,250 per tonne. At this price, your put option is now in the money.

Gain from Put Option Exercise

By exercising your put option now, you get to assume a short position in the underlying aluminum futures at the strike price of USD 1,500. In other words, it also means that you get to sell 25 tonnes of aluminum at USD 1,500/ton on delivery day.

To take profit, you enter an offsetting long futures position in one contract of the underlying aluminum futures at the market price of USD 1,250 per tonne, resulting in a gain of USD 250.00/ton. Since each LME Aluminum put option covers 25 tonnes of aluminum, gain from the long put position is USD 6,250. Deducting the initial premium of USD 2,450 you paid to purchase the put option, your net profit from the long put strategy will come to USD 3,800.

Long Aluminum Put Option Strategy
Gain from Option Exercise=(Option Strike Price - Market Price of Underlying Futures) x Contract Size
=(USD 1,500/ton - USD 1,250/ton) x 25 ton
=USD 6,250
 
Investment=Initial Premium Paid
=USD 2,450
 
Net Profit=Gain from Option Exercise - Investment
=USD 6,250 - USD 2,450
=USD 3,800
 
Return on Investment=155%

Sell-to-Close Put Option

In practice, there is often no need to exercise the put option to realise the profit. You can close out the position by selling the put option in the options market via a sell-to-close transaction. Proceeds from the option sale will also include any remaining time value if there is still some time left before the option expires.

In the example above, since the sale is performed on option expiration day, there is virtually no time value left. The amount you will receive from the aluminum option sale will be equal to it's intrinsic value.

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