When buying an option, you won't receive margin calls or be required to deposit additional funds if the market moves against you. This is because the risk is limited to the premium paid for the option, and there is no additional liability beyond that amount.

Margin calls typically occur when trading with leverage, such as buying on margin or using futures contracts. In these cases, if the market moves against you, you may be required to deposit additional funds or sell some of your positions to meet the margin requirements.

However, when buying an option, you have already paid the premium, and there is no additional margin requirement. This means you won't receive margin calls or be required to deposit additional funds, even if the market moves against you.

Here are some key points about no margin calls:

1. _No additional funding required_: You won't be required to deposit additional funds if the market moves against you.

2. _No margin calls_: You won't receive margin calls or be required to sell positions to meet margin requirements.

3. _Limited risk_: The risk is limited to the premium paid for the option.

4. _No leverage_: You're not using leverage, so you won't be subject to margin calls.

5. _Peace of mind_: You can trade with peace of mind, knowing that your risk is limited and you won't receive margin calls.