What Is a Short Call?

A short call option position in which the writer does not own an equivalent position in the underlying security represented by their option contracts. Making a short call is an options trading strategy in which the trader is betting that the price of the asset on which they are placing the option is going to drop.

How Does a Short Call Work?

A short call strategy is one of two simple ways options traders can take bearish positions. It involves selling call options, or calls. Calls give the holder of the option the right to buy an underlying security at a specified price.

If the price of the underlying security falls, a short call strategy profits. If the price rises, there’s unlimited exposure during the length of time the option is viable, which is known as a naked short call. To limit losses, some traders will exercise a short call while owning the underlying security, which is known as a covered call.

Real World Example of a Short Call

Say Liquid Trading Co. decides to sell calls on shares of Humbucker Holdings to Paper Trading Co. The stock is trading near $100 a share and is in a strong uptrend. However, the Liquid group believes Humbucker is overvalued, and based on a combination of fundamental and technical reasons, they believe it eventually will fall to $50 a share. Liquid agrees to sell 100 calls at $110 a share. This gives Paper the right to purchase Humbucker shares at that specific price.

Selling the call option allows Liquid to collect a premium upfront; that is, Paper pays liquid $11,000 (100 x $110). If the stock heads lower over time, as the Liquid gang thinks it will, Liquid profits on the difference between what they received and the price of the stock. Say Humbucker stock does drop to $50. Then Liquid reaps a profit of $6,000 ($11,000 - $5,000).

Things can go awry, however, if Humbucker shares continue to climb, creating limitless risk for Liquid. For example, say the shares continue their uptrend and go to $200 within a few months. If Liquid executes a naked call, Paper can execute the option and purchase stock worth $20,000 for $11,000, resulting in a $9,000 trading loss for Liquid.

If the stock were to rise to $350 before the option expires, Paper could purchase stock worth $35,000 for the same $11,000, resulting in a $24,000 loss for Liquid.

Short Calls Versus Long Puts

As previously mentioned, a short call strategy is one of two common bearish trading strategies. The other is buying put options or puts. Put options give the holder the right to sell a security at a certain price within a specific time frame. Going long on puts, as traders say, is also a bet that prices will fall, but the strategy works differently.

Say Liquid Trading Co. still believes Humbucker stock is headed for a fall, but it opts to buy 100 $110 Humbucker puts instead. To do so, the Liquid group must put up the $11,000 ($110 x 100) in cash for the option. Liquid now has the right to force Paper, who is on the other side of the deal, to buy the stock at this price – even if Humbucker shares drop to Liquid's projected $50 a share. If they do, Liquid has made a tidy profit – $6,000.

In a way, it's achieving the same goal, just through the opposite route. Of course, the long put does require that Liquid shell out funds upfront. The advantage is that unlike the short call, the most Liquid can lose is $11,000, or the total price of the option.

Key Takeaways

  • A short call is a strategy involving a call option, giving a trader the right, but not the obligation, to sell a security.
  • A short call is a bearish trading strategy, reflecting a bet that the security underlying the option will fall in price.
  • A short call involves more risk but requires less upfront money than a long put, another bearish trading strategy.