What it is
A covered call combines a long position in one hundred shares with a short call on the same stock. The premium received lowers the effective cost of the shares in exchange for capping the upside at the strike price.
How it works
The payoff is straightforward. Maximum profit is the strike minus the purchase price plus the premium received, achieved anywhere at or above the strike at expiry. The break-even is the purchase price minus the premium. Below that, the position loses roughly as the shares do, cushioned only by the premium collected. If the call finishes in the money the shares are called away, and early assignment is a genuine risk before an ex-dividend date once the remaining extrinsic value is small.
How traders use it
It is used to generate income from an existing holding when the view is flat to mildly positive, to reduce the volatility of a portfolio's returns, and as a disciplined way to pre-commit to an exit price. Rolling the short call out in time, or up and out, is the standard adjustment when the stock approaches the strike and the underlying view has not changed.
Where it breaks down
The payoff is identical in shape to a short put at the same strike, which is the clearest way to see the risk: this is not a conservative income position, it is a bullish position with truncated upside. It is frequently marketed as safe yield, but the premium collected is small relative to the downside retained, and studies of systematic buy-write indices generally find risk-adjusted returns similar to simply holding the underlying, with a different distribution rather than a better one.
Educational reference. This entry describes how a concept is defined and used. It is not investment advice, not a recommendation, and not a signal. Any rule you build from it should be tested with realistic costs before it is traded, and no historical result guarantees a future one.