Covered Call: Rent Out the Shares You Already Own
The income strategy every long-stock holder should understand — the mechanics, the strike math, and the upside cap that surprises first-timers.
Frequently asked questions
What is a covered call?
You own at least 100 shares of a stock and sell (write) one call option against them. The premium is yours to keep. In exchange, you agree to sell your shares at the strike if the stock finishes above it at expiration. It's 'covered' because you already hold the shares you might have to deliver — no margin, no unlimited risk.
Covered call vs naked call — what's the difference?
Risk. A naked (uncovered) call has theoretically unlimited loss because you'd have to buy shares at any price to deliver them. A covered call's shares are already in hand, so the worst case is simply that your stock gets called away at the strike — you cap your upside, you don't blow up. For retail, naked calls are rarely worth the tail risk; covered calls are a staple.
How do I pick the strike and expiration?
Sell a call at a price you'd be happy to sell your shares at — usually out-of-the-money, in the 0.20-0.30 delta range, 30-45 days to expiration for the best premium-to-decay tradeoff. A higher strike keeps more upside but pays less; a closer strike pays more but is likelier to get called away. Match the strike to whether you want income or to actually exit the position.
When should I roll a covered call?
If the stock rallies toward your strike and you'd rather keep the shares, roll UP and OUT — buy back the short call and sell a higher strike further out for a net credit (or small debit). If the stock drops and the call is now far OTM, you can buy it back cheaply and resell a lower strike to harvest more premium. If you're fine letting the shares go, do nothing and take assignment.
What's the catch?
You sell your upside. The premium feels like free money until the stock gaps 20% and your shares get called away at a strike well below the new price — you keep the premium and the gain up to the strike, but miss the rest. Covered calls shine on stocks you expect to grind sideways or up slowly; they're a poor fit right before a catalyst you think will run.
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