Covered Call
Prerequisite strategies: Long Call and Long Put — you must have bought and held an option to expiry before you sell one. Next in tier: Cash-Secured Put, then the Collar.
Why this structure exists
A covered call does one job: it turns a decision you have already made — that you would sell these shares at a higher price — into cash today. You own the shares, you have a price at which you would happily let them go, and selling a call at that strike pays you a premium now for agreeing, bindingly, to sell there if the market gets there before expiry.
The nearest simpler alternative is a good-till-cancelled limit sell order at the same price. Why not just do that instead? Because it pays you nothing to wait; the covered call below pays £108.60 for a 60-day wait, about 2.1% of the position. What you give up is that the limit order is free to cancel, while the option can only be undone by buying it back at whatever the market charges — and if the shares run well past the strike, you have sold that entire move for the premium.
Construction
| Leg | Buy / sell | Quantity | Strike rule | Expiry rule | Target delta | Typical price |
|---|---|---|---|---|---|---|
| Shares | Owned or bought | 1,000 (ICE UK) or 100 (US listed) | n/a | None — they outlive the option | +1.00 | Market price |
| Call | Sell to open | 1 contract | Above cost basis, at a price you would accept | 30–60 days, before the next ex-dividend date | 0.20 – 0.30 | 2%–4% of share price |
| NET | Net credit | 1 covered unit | Upside capped at the strike | Reset each cycle | +0.70 to +0.80 | Credit up front |
Three constraints are arithmetic, not preference. (1) shares held ≥ contract size — 999 BP shares does not cover an ICE contract, and the broker treats the call as naked. (2) strike + net premium per share > cost basis per share, or assignment books a loss. (3) net premium ≥ 10 × round-trip commission.
Risk box (figures from the worked example)
Max loss = cost basis − net premium (shares to zero). Max profit = (strike − cost basis) × contract size + net premium. Breakeven = cost basis per share − net premium per share. If you cannot fill all six cells in pounds before you click, do not place the trade.
Horizontal axis: BP share price at expiry, in pence. One penny is £10 per 1,000-share contract. The max loss of £5,120.40 sits far below the bottom of the chart — which is the point of drawing it in pounds.
Entry criteria
Every row is a gate. Fail one and you decline the trade and keep the shares.
| Gate | Rule | Why |
|---|---|---|
| Implied volatility | Sell only when IV rank > 30. Below IVR 25, hold the shares instead. | Cheap premium does not pay for a capped upside. |
| DTE window | 30–60 days. Not weeklies. | Weeklies multiply commission and tax lines for a few pence. |
| Strike / delta | 0.20–0.30 delta, above cost basis, at a price you would accept. | A 70–80% chance of expiring worthless, and no forced loss if it does not. |
| Liquidity | Live two-sided quote, bid-ask under 10% of mid. ICE ticks in 0.25p (£2.50). | A 2p spread on an 11p option costs 18% of the credit. UK series are thin. |
| Underlying | Shares you own, would still own 20% lower, in full contract size. | A share position first. Nothing here fixes a bad holding. |
| Event calendar | Expiry before the next ex-dividend date; check results dates and the third-Friday last trading day (16:30 London). | Ex-dividend is the commonest cause of early assignment. |
Do not enter if: you would be upset to lose the shares at the strike; you hold less than one full contract; the premium is under 10× round-trip commission; an ex-dividend date falls before expiry; or the shares sit in an ISA, where options are not permitted at all.
Greeks at entry, and how they evolve
| Greek | At entry (60 DTE, 520p) | 30 DTE, price unchanged | 7 DTE, price unchanged | After +1 SD (579p) | After −1 SD (461p) |
|---|---|---|---|---|---|
| Delta | +720 share-equivalents | +780 | +940 | +380 | +950 |
| Gamma | −58 delta per 10p rise | −67 | −34 | −76 (worst) | −7 |
| Theta | +£1.85 per day | +£1.90 | +£1.00 | +£2.75 | +£0.15 |
| Vega | −£7.30 per vol point | −£4.10 | −£0.50 | −£5.90 | −£0.30 |
Illustrative values for the example's parameters (28% implied volatility, 1,000-share contract). Your chain will differ.
Theta is what pays you, but delta decides whether you win. Look at the two ends of the table: after a bad move you carry +950 share-equivalents of downside, after a good one only +380 of upside. That asymmetry is the trade. The position's character flips the moment the shares cross 560p — until then it is long stock with a small bonus, after that a short-dated bet that the shares come back down, with gamma working against you fastest in the final week.
One ICE contract on BP, August to October 2026
BP trades around 520p (mid-August 2026 — price your own trade from a live chain). The ICE Futures Europe option on BP is rights over 1,000 shares, American-style, physically delivered, quoted in pence per share, ticking in 0.25p (£2.50 per contract), last trading day the third Friday at 16:30 London. One penny of premium is £10.
Step 1 — collateral. Buy 1,000 BP at 520p.
Step 2 — sell the call. Sell 1× BP 560 call expiring Friday 16 October 2026 (60 days), delta 0.28, at 11p.
Base case — BP at 530p, call expires worthless.
Favourable case — BP at 585p, assigned at 560p.
Adverse case — BP at 470p.
On a US-listed name instead — the realistic route for most UK retail — the contract is 100 shares and the premium is in dollars, but the gain must still be computed in sterling at the exchange rate on the date of each disposal: the grant date for the premium, the disposal date for the shares. A move in GBP/USD alone can turn a dollar profit into a sterling loss, and the broker's FX conversion spread is charged on a credit that may only be $80.
This is a single, hand-picked, favourable scenario. It is not a typical or expected outcome. Past performance and illustrative examples are not a reliable indicator of future results.
Management and adjustment
At Level 1 you do not adjust a covered call: you close it, or you let it expire. Every "adjustment" is a new trade with a new tax point, and the two beginners reach for — rolling down, and rolling for a debit — both make the position worse.
| Trigger | Diagnosis | Action | Do NOT do this |
|---|---|---|---|
| Call at 50% profit | Premium banked; the rest is unpaid risk | Buy it back, or re-sell further out | Hold for the last few pence |
| Shares through strike | Called at a price you agreed to | Let assignment happen — you booked this at entry | Roll up for a debit to keep the shares |
| Ex-dividend before expiry | Extrinsic below the dividend means assignment tonight | Close the call before the ex-date if you want the dividend | Assume American options only get exercised at expiry |
| Shares fall hard | A share problem, not an option problem | Close the call cheaply; judge the shares on their merits | Sell the next call below cost basis |
Roll when the call is at 50%+ profit and you want another cycle: close it, sell a new one 30–60 days out, strike still above cost basis. Roll to a later expiry and the same or a higher strike — never lower. Do not roll for a net debit, ever: paying to defend a credit trade makes a capped-profit position one that can no longer profit.
Exit rules
Profit target: buy the call back at 50% of the premium received — here 5.5p, costing £56.40 with commission and keeping £52.20 of the £108.60. Stop: the stop belongs on the shares, not the option, because a short call that trebles usually did so because your shares rose. Mechanically: if BP closes below 470p (about 10% below entry, £529 down against basis), close both legs and reassess the holding. Time stop: at 21 days to expiry, close or roll regardless of P&L — that is where gamma starts costing more than theta pays. Assignment-avoidance exit: close before any ex-dividend date while the call still has extrinsic value, and never carry an in-the-money call into the third Friday expecting to manage it that afternoon: ICE UK stock options stop trading at 16:30 and exercise notices run to 18:30 London.
If all four are silent — call worth pennies, no dividend, more than 21 days left — you do nothing. Doing nothing is a position.
Margin and broker reality
A cash account is enough: the shares are the collateral and the broker holds them so you cannot sell them out from under the call. You need options permission and an appropriateness assessment, but not uncovered-option permission, and no margin is charged. Access is the real constraint — Hargreaves Lansdown, AJ Bell and Trading 212 offer no options in any account, so the UK routes are effectively Interactive Brokers or Saxo. IBKR's schedule puts a UK stock option at roughly £1.40 per contract all-in (pricing). ICE UK series are thin, and a wide spread costs you exactly like margin would.
strike + net premium per share > cost basis per share. If no strike above your basis pays enough, the correct trade is no trade.What to trade instead, and where this leads
Simpler: hold the shares and place a limit sell order — every penny of upside kept, no tax event until you sell, but nothing paid to you for waiting. That is the right answer whenever IV rank is low. More precise: the Collar adds a protective put funded by this call, capping the downside a covered call leaves wide open, at the cost of more upside. More capital-efficient, one tier up: the Poor Man's Covered Call replaces £5,229 of shares with a long-dated call — cheaper, but with expiry risk, no dividends and a second leg. Systematised: alternating this with a cash-secured put is the Wheel, a Level 2 system rather than a beginner trade.
First-trade checklist
Clear the paper gate first: price three covered calls on paper from a live chain and follow each to expiry, including one that goes through the strike. Only then:
- Confirm a full contract of shares, and your cost basis per share including SDRT and commission.
- Check the dividend calendar and results date; pick an expiry clearing both, 30–60 days out.
- Find the 0.20–0.30 delta strike above your basis; test the bid-ask against the 10%-of-mid rule.
- Write down premium in pence and pounds, breakeven, max loss, max profit, profit target, stop and time-stop date.
- Place a limit order at the mid, sell to open, one contract — never a market order on a thin UK series.
- Log it the same day: date, underlying, leg, contract size, premium, commission, grant-date tax point.