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Option trades, like any other market trade, involve both a buyer and seller in order to complete the transaction.
The buyer of a call option has the right to buy the underlying security at the strike price before the expiration date. The option seller, or writer, is granting the call buyer that right and must deliver the underlying security if the call option is exercised by the buyer.
If the option writer already owns the underlying security when the call trade is opened, the call is said to be covered. That means the options writer has covered their position in the options contract with a long position in the underlying security.
If a trader owns 100 shares of Apple (NASDAQ: AAPL), they could write one covered call contract against those shares. If AAPL rises above the strike price before the exercise date, the buyer could exercise the option and the shares would be sold from the option writer's account at the strike price. The covered call position would lead to a small premium collected and a sale of AAPL at a price the writer agreed to accept.
How Traders Use It
Covered call writing is usually considered to be a low-risk, income generating strategy. Traders who own a stock can sell deep out-of-the-money calls to receive small premiums while they continue to benefit from appreciation in the underlying security.
For example, a trader owning 100 shares of AAPL could sell a call with a strike price that is $50 above the current market price and expires in 30 days. They would immediately receive a small premium of maybe $5 a share.
If AAPL goes up by less than $50 or falls over the next 30 days, selling a covered call increases the trader's profits by an additional $5 per share. If this strategy is repeated over time, it can deliver a significant amount of income to the trader. If AAPL rises, then the trader will be able to sell at a profit.
Some traders will sell a security by using a covered call to get a slightly higher price on the transaction if the call is overvalued relative to the underlying. If the trader with 100 shares of AAPL wanted to sell at the market and an at-the-money call was selling for $5 on the expiration date, they could sell the call and make an additional small profit on the trade when the call is exercised.
These opportunities are rare, but they are possible in fast-moving markets where volatility is relatively overpriced. Volatility is a critical factor in determining the options price, and if the level of volatility changes abruptly, market opportunities like this can exist for brief periods.
Why It Matters To Traders
Covered call writing can allow a trader to increase their income and limit the risk in some trades. This strategy is often used with stocks that pay a dividend to generate additional income.
In addition to the dividend, the trader could generate returns of several percentage points on the covered calls, and if the stock appreciates, then the trader gains from that as well. If the strike price is greater than their initial purchase price, the trader will be able to sell their position with a gain and reinvest the profits into another covered call position. By repeating this process over time, large profits are possible.
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