Covered Calls 101: The Basics & Philosophy

What is Covered Call Writing?

Covered call writing is the name given to the strategy by which one sells a call option while simultaneously owning the obligated number of shares of underlying stock.

The writer should be mildly bullish, or at least neutral, toward the underlying stock. By writing a call option against stock, one always decreases the risk of owning the stock. It may even be possible to profit from a covered write if the stock declines somewhat.

However, the covered call writer does limit their profit potential and therefore may not fully participate in a strong upward move in the price of the underlying stock.

Downside Protection Explained

Let's look at an example. An investor owns 100 shares of XYZ stock, trading at $48. They sell the July 50 Call for $3.00 ($300 total).

If XYZ is below $50 at expiration, the call expires worthless. The investor keeps the $300 premium. This acts as a buffer. The stock can drop by 3 points (to $45), and the investor still breaks even on the total trade.

This $300 is immediate cash flow that offsets potential losses.

What Happens if the Stock Rises?

If XYZ rises to $50, the investor keeps the $300 premium plus the $200 gain on the stock (from $48 to $50).

If XYZ rises to $60, the stock will be "called away" at $50. The investor still makes the max profit (Premium + Stock appreciation to strike), but misses out on the gains above $50.

This is the trade-off: You limit your maximum profit to gain a higher probability of profit.

The Mathematics of Profit

For those who prefer formulae, the profit potential and break-even point of a covered write can be summarized as follows:

Visualizing the Payoff

The profit graph of a covered call is unique. It looks like a "hockey stick" that flattens out.

In this chart (Strike $50, Premium $3, Stock Cost $48), notice how your profit is capped at $500 (the flat line), but your losses are cushioned by the premium (the line crosses zero at $45, not $48).

The Philosophy: Total Return

The primary objective of covered writing is increased income through stock ownership. The strategy will outperform outright stock ownership if the stock falls, remains the same, or rises slightly.

The only time the outright owner wins is if the stock rockets up. But markets don't always rocket up. They often chop sideways.

A "Total Return" investor views the position as a single entity—Stock minus Option Credit. They are willing to let the stock be called away to lock in that return.