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Home » Blog » Derivatives Trading » Understanding call writing and how it works?
Religare Broking by Religare Broking
May 28, 2025
in Derivatives Trading
0

Understanding call writing and how it works?

What is call writing in the Stock Market?
  • Last Updated: May 28,2025 |
  • Religare Broking

Investors have multiple approaches to perform futures and options trading in stock markets. The financial tool known as ‘call writing’ represents an interesting investment strategy. A method to generate income lets investors sell call options. The investment technique helps investors to check market fluctuations and maintain profitable opportunities. Understanding options fundamentals properly is necessary before starting to work with call writing methods. You can purchase these financial instruments to obtain the right of purchasing or selling an asset through pre-established pricing on predetermined dates.

Recommended Read: What is F&O Trading?

What is call writing in the Stock Market?

The procedure enables investors to sell call options with predetermined strike prices for premium income. The strike price represents the authorized amount investors agree on for either asset purchase or asset sale when options contracts reach their expiration date. The options contract loses its validity through expiration which represents its date of termination.

The person who practices call writing receives payment known as the premium from the call option buyer. A rising stock price enables the option buyers to exercise their purchase rights at the agreed strike price but this scenario results in financial losses for call writers. The call writer will retain the premium amount as profits if the stock price does not rise and instead remains stable or decreases.

Call Writing Example

Example: Covered Call Writing (in Rupees)

Stock: XYZ Industries
Current Market Price (CMP): ₹2,400
Call Option Sold: Strike Price ₹2,500, Expiry in 1 month
Premium Received: ₹30 per share
Lot Size: 250 shares (NSE standard for XYZ)

Scenario 1: Stock stays below ₹2,500 at expiry

  • Let’s say XYZ closes at ₹2,450.
  • The buyer does not exercise the option.
  • You keep the ₹30 premium × 250 shares = ₹7,500 profit
  • You also keep your XYZ shares.

Total profit: ₹7,500

Scenario 2: Stock goes above ₹2,500 (e.g- ₹2,600)

  • The buyer exercises the call option.
  • You must sell your 250 shares at ₹2,500 (even though the market price is ₹2,600).
  • You still keep the premium of ₹7,500.

Gain from selling shares = (₹2,500 – ₹2,400) × 250 = ₹25,000
Premium earned = ₹7,500
Total profit = ₹32,500

But you miss out on the ₹100 extra per share (₹2,600 – ₹2,500) = ₹25,000 in opportunity cost.

Summary:

  • Max profit is limited to the premium + stock gain up to the strike price.
  • Risk is lower if you already own the stock (covered call).
  • Ideal if you think the stock will stay flat or slightly rise.

Exploring Various Call Writing Strategies

If you are searching for call writing methods, here are some well known methods that you should consider:

Naked Call Writing: This strategy of writing call options does not hold underlying stock or asset which has the biggest loss of risk since stock price can grow without Limit.

Collar Options: This technique involves purchasing a put option, and selling call option simultaneously, which will serve as a shield against a possible loss from the sold call option.

Covered Call: This method involves selling call options into stocks you already own, which is particularly useful when anticipating a decline or stable stocks over the short term. It may offset some losses but you might also limit potential profits.

Advantages of Call Writing

  • As the call option writer, when you write a call option and receive the premium payment from the buyer, it remains yours no matter if they decide to exercise the purchase rights for the underlying securities.
  • This method provides flexibility since you can end contracts before expiration thus allowing you to adjust your standing whenever needed.

Factors Affecting Call Writing Strategies: 

Stock Price Volatility: 

A company’s changing stock prices significantly impacts both options trading and call writing operations. Stock prices showing high volatility push the costs of call options upward because market uncertainties increase the potential for price movements in both positive and negative directions.

Market Sentiment: 

A call writing strategy’s success potential depends heavily on the general market sentiment within the investment sector. The writer stands to gain more potential profits from call options during bullish market conditions because these options tend to be more expensive. The writer’s profit chances decrease when call option prices drop during bearish market conditions.

Interest Rates: 

Stock prices and call writing results are influenced by the existing interest rates that direct market conditions. The changing conditions of interest rates cause price movements across stocks which subsequently influences the success of call writing investment strategies.

Price Movement Trends: 

Stock price movement direction plays a vital role in determining the effectiveness of call writing options. Share prices moving upward drives up call option prices but movements downward decreases these prices.

Does Call Writing Indicate a Bullish or Bearish Position 

The process of writing calls does not automatically indicate a directional market perspective. A call writer’s bull or bear market outlook depends on personal investment philosophy and the unique aspects of their strategy. Investors who write call options with strike prices above present stock prices tend to have negative market expectations that forecast minimal or decreasing stock values. Call options with strike prices below current market value become appealing for investors who predict stock prices will rise.

To Sum Up

The method of using call writing options stands as an effective solution to protect your portfolio when you wish to enter derivatives trading. Your premium payment serves as loss protection when selling options without the need for the buyer to exercise the contract. Research remains the crucial factor to achieve maximum profits.

Tags: Futures and Optionscall writingstock marketOptions Trading

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Disclaimer:This blog is written exclusively for educational purpose. Any stock mentions in the blog are examples and not recommendations. Please refer to our research reports or analyst recommendations for stock ideas.

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