Basics

Calls and Puts Explained Simply

Call = right to buy. Put = right to sell.

Core idea

What matters

A call benefits from rising prices, a put from falling prices.

The buyer has a right, the seller takes on an obligation.

Example

Stock at 100 EUR

Long call strike 95 Benefits from rising prices. This call is ITM because the strike is below spot.
Long put strike 105 Benefits from falling prices. At spot 100, this put is also ITM because the strike is above spot.
OTM note A put would be OTM if its strike is below spot, for example 95 EUR.
Shortcut Call (Long) = upside, Put (Long) = downside or hedge.

Long call and long put: value is not profit

Long Call: Strike 95 EUR

Long Put: Strike 105 EUR

Call BE: 103 EURPut BE: 96 EUR

Call: Strike 95 / premium 8 EUR
Put: Strike 105 / premium 9 EUR

Illustrative premiums, not live quotes. At spot 100 EUR both options have 5 EUR intrinsic value, but neither covers its premium yet. White dots mark break-even. For a standard 100-share contract: P/L × 100. Fees excluded.

Summary

Long and short

Call (Long) Right to buy the underlying at the strike price. Long calls benefit from rising prices.
Put (Long) Right to sell the underlying at the strike price. Long puts benefit from falling prices.
Option seller Sellers of calls or puts take on obligations and receive the premium immediately at the current market price.
Call (Short) Obligation to deliver the underlying at the strike price.
Put (Short) Obligation to take delivery of the underlying at the strike price. Enough free margin is essential.
Example A CSP (Cash-Secured Put) is a typical short-put setup.