Call vs Put Options: What They Are and How They Differ

Calls and puts are the two fundamental types of options — the contracts that grant a right, but not an obligation, to trade an asset at a set price. Understanding the difference between them is the first step to understanding options at all. In short: a call is a right to buy, and a put is a right to sell. This article compares the two for education only, and does not describe a product available on any specific platform.

The call option

A call option gives its buyer the right to buy the underlying asset at a fixed strike price by expiry. A buyer typically wants a call when they expect the underlying price to rise.

• If the price climbs above the strike, the call becomes more valuable, because the right to buy at the lower strike is worth more.
• If the price stays below the strike, the call can expire worthless, and the buyer's loss is limited to the premium they paid.

The broader mechanics of options — strike, expiry, and premium — are explained in options trading.

The put option

A put option gives its buyer the right to sell the underlying asset at a fixed strike price by expiry. A buyer typically wants a put when they expect the underlying price to fall, or to protect an existing holding against a decline.

• If the price falls below the strike, the put becomes more valuable, because the right to sell at the higher strike is worth more.
• If the price stays above the strike, the put can expire worthless, and again the buyer's loss is limited to the premium.

Putting them side by side

The clearest way to remember the difference:

• Call = right to BUY, generally sought when expecting a price rise.
• Put = right to SELL, generally sought when expecting a price fall or hedging downside.

For buyers of either type, the maximum loss is the premium paid — a known, limited risk. For sellers (writers) of either type, the risk profile is very different and can be much larger, which is one reason selling options is considered advanced. Both calls and puts are heavily influenced by volatility, the concept in volatility (VOL), since a wider range of possible outcomes raises the value of the right an option confers. In traditional markets, settlement can involve mechanisms like the special quotation in MSQ.

A note on products

Calls and puts as described here are vanilla options — a distinct instrument type. WEEX offers futures and perpetual products; this page does not assert that vanilla options are available to trade on WEEX. If you are exploring derivatives on WEEX, those are its futures and perpetual markets, not options.

A worked example

Suppose an asset trades at 100.

• A trader expecting a rise might look at a call with a strike of 105. If the asset climbs to 120, the call gains value; if it never reaches 105, the call can expire worthless and the loss is the premium.
• A trader expecting a fall might look at a put with a strike of 95. If the asset drops to 80, the put gains value; if it stays above 95, the put can expire worthless and, again, the loss is the premium.

This mirror symmetry — calls for up, puts for down, limited risk for buyers — is the heart of the call-versus-put distinction. Because options are complex, this is educational information only, not a recommendation to trade them, and not a claim that they are offered on WEEX.

Related concepts

• Options trading: the overall framework calls and puts belong to — options trading.
• Volatility (VOL): a major driver of both call and put value — volatility (VOL).
• MSQ (special quotation): a settlement mechanism in traditional options and futures — MSQ.

Summary

A call is the right to buy and a put is the right to sell an asset at a set strike by expiry. Calls suit an expectation of rising prices, puts an expectation of falling prices or hedging. Buyers of either face limited, known risk (the premium), while sellers face much larger risk. This page is educational and does not assert that vanilla options are tradable on WEEX, whose derivative markets are futures and perpetuals.

This article is for educational and informational purposes only and does not constitute investment, financial, or tax advice. Cryptocurrency and derivatives trading involve significant risk. Always do your own research.