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Options library / Level 1 Foundation / Strategy 01

Long call for UK investors: the first structure, priced in pounds

The curriculum starts here because the long call's worst case is one number you can write down before you click. This page prices one on a UK underlying, at the contract size you would really be dealing in.

L1Foundation tier, no prerequisites
1,000Shares per ICE UK contract
£471.40Max loss in the worked example
GIANo ISA, and rarely a SIPP
Options hub UK basics Long call Greeks and IV Assignment and expiry UK tax and platforms Position sizing Strategy selector
01

Long Call

Buy the right to buy — the entire risk is the cheque you write on day one
L1 FoundationBullishDefined risk£300–£900 per ICE contract

Prerequisite strategies: none — this is the first structure in the curriculum. Read UK options basics, wrappers and position sizing first. Next: the long put, then the covered call.

Why this structure exists

A long call turns a directional opinion into a position with a hard, pre-agreed maximum loss. Buy 1,000 BP shares at 530p and you have committed £5,300, with downside running to zero. Buy one BP call and you commit a few hundred pounds — and that is the loss in every scenario. No margin call, no assignment notice, no morning where the broker asks for more money.

The leverage is a side effect, not the point. You are buying a known worst case, and you pay for it in time value: the part of the premium that is not intrinsic worth is rent on the clock, gone whether you are right or wrong.

The nearest simpler alternative is buying the shares, which never expire, never decay and pay dividends. Why not just do that? Because the call caps the money at risk at a number you chose. Take it only when you have a specific move and a specific deadline. Without the deadline you have a share purchase, not a long call trade.

Construction

LegBuy / SellQuantityStrike ruleExpiry ruleTarget deltaPrice
CallBUY (debit)1 contract = 1,000 shares (ICE UK); 100 (US)1–2 strikes below spot60–120 days; never the front weekly0.60–0.7047p = £470
NETNet debit1 contract500p strike, 530p spot123 days+0.66£471.40 with commission

Three inequalities to check on the chain before committing:

  • Extrinsic ≤ 40% of premium. Here 17p of 47p, or 36%. Above 40% you are buying decay.
  • Premium ≤ 2% of the account. £471.40 is 2% of £23,570. More is the wrong contract size.
  • DTE ≥ 2 × the days the move needs. A six-week thesis buys twelve weeks.
Net debit
£471.40
Max loss
£471.40
Max profit
Uncapped
Breakeven
547.3p
Capital required
£471.40 cash
Risk type
Defined

Formulas for any contract: max loss = premium × contract size + commission. Max profit = (settlement − strike) × contract size − cost. Breakeven = strike + premium + round-trip costs per share.

Payoff — long BP 500 call, £ P&L per 1,000-share contract
£ P&L per contract (1,000 shares) +£500 £0 −£250 −£471 450p 500p 550p 600p BP share price (pence) Strike 500p Breakeven 547.3p Value today, 123 DTE Max loss −£471.40 Profit uncapped above breakeven At expiry

The gap between the dashed and solid lines is what a share buyer does not own: time value. It is largest near the strike and gone by 18 December. Below breakeven the dashed line sits above the expiry line, which is why closing early beats holding on.

Entry criteria

GateRuleReason
Implied volatilityIV rank below 40; below 25 betterYou are long vega
Days to expiry60 to 120Under 45, theta outruns most theses
Strike / deltaDelta 0.60–0.70, 1–2 strikes ITMMostly intrinsic, so roughly right still pays
LiquiditySpread ≤ 10% of mid; open interest ≥ 100ICE UK chains are thin; a 15% spread is a 15% loss at entry
UnderlyingA FTSE 100 name you would own 1,000 shares ofICE delivery is physical
Event calendarNo results, ex-dividend or index review in the windowBP goes ex-dividend quarterly and your call receives nothing

Do not enter if: IV rank is above 60; it is the front weekly; the spread is wider than 10% of mid; the premium exceeds 2% of the account; or you cannot state the price and the date in one sentence.

Greeks at entry and how they evolve

GreekAt entry (123 DTE, 530p)61 DTE, price unchanged7 DTE, price unchangedAfter +1 SD (610p)After −1 SD (450p)
Delta+0.66+0.72+0.95+0.90+0.26
Gamma0.00440.00590.00550.00170.0047
Theta−£1.03/day−£1.41/day−£1.29/day−£0.33/day−£0.85/day
Vega+£10.90/pt+£7.20/pt+£0.80/pt+£5.40/pt+£8.40/pt

Modelled at 26% implied volatility and 4% rates, per 1,000-share contract. Rho is negligible here and only matters on LEAPS.

Theta decides this trade. You paid 17p of time value, £170, and that is the most it can ever take — but it takes it on an accelerating curve. The position's character flips at roughly 21 days: before that you hold a leveraged share substitute tracking BP; after it, a short-dated bet on whether BP is above 500p on one particular Friday. That flip, not any price level, is why the time stop exists.

UK worked example — ICE Futures Europe, 1,000 shares per contract

BP p.l.c. at 530p, you expect 580p by the end of the year

BP ordinary shares were 530p on the LSE on 17 August 2026. The ICE Futures Europe BP option is quoted in pence per share, one contract is rights over 1,000 shares, it is American style and physically delivered, the tick is 0.25p (£2.50 a contract), and the December series stops trading 16:30 London on Friday 18 December 2026.

The trade: buy 1 × BP December 2026 500 call at 47p. Delta 0.66, IV 26%, 123 DTE.

Premium:47p × 1,000 shares = £470.00
Commission (IBKR UK: £1.00 + £0.37 exchange + £0.03 clearing):£1.40
Stamp duty at entry:£0 — SDRT bites only when shares move
Intrinsic bought:30p = £300.00
Time value bought (at risk to theta):17p = £170.00
Breakeven (500p + 47p + 0.28p round-trip costs):547.3p, i.e. BP +3.3%
Total outlay = MAX LOSS:£471.40

Branch A — BP 590p on 18 October, 61 days left. The call is worth about 90p.

Sell to close:90p × 1,000 − £1.40 = £898.60
Profit:+£427.20 — BP +11.3%, option +90.6%
ACTION:+50% target fired at 70.5p. Close.

Branch B — BP 540p on 27 November, 21 days left. About 41.5p.

Sell to close:41.5p × 1,000 − £1.40 = £413.60
Loss:−£57.80 — BP +1.9%, you −12.3%. Right on direction, still losing: the normal outcome.
ACTION:21-day time stop fired. Close regardless of the view.

Branch C — BP 505p on 18 October. About 23.5p, half what you paid.

Sell to close:23.5p × 1,000 − £1.40 = £233.60
Loss:−£237.80 — 50.4% of outlay on a 4.7% fall
ACTION:−50% stop fired. Close. Do not average down.

Branch D — BP 480p on 18 December. The call lapses; you lose the full £471.40, an allowable capital loss for 2026/27.

Branch E — BP 610p on 18 December and you want the shares. The branch with the stamp duty in it.

Exercise: pay the strike:500p × 1,000 = £5,000.00
SDRT at 0.5% of the consideration:£25.00
CGT base cost (£5,000 + £470 + £1.40 + £25):£5,496.40 = 549.64p per share
Market value:£6,100.00 → unrealised gain £603.60
Or sell the call at 110p instead:+£627.20, no SDRT, no £5,000 cash call

The £23.60 gap is the £25 of SDRT less £1.40 of saved commission. Exercise only if you want the shares; if you want the money, sell the option.

On the US chain instead — the realistic route for most UK retail, since a US contract is 100 shares and the chains are deeper — the gain is still computed in sterling. Buy at $4.00 × 100 = $400 with GBP/USD at 1.3552 and the cost is £295.16; sell at $600 with the rate at 1.4000 and the proceeds are £428.57. The dollar gain is +50%, but the chargeable gain is £133.41, not the £147.58 an unchanged rate would have given. Sterling cost £14.17, and the broker's conversion spread lands on top, twice.

This is a single, hand-picked, favourable scenario. It is not a typical or expected outcome. Premiums are modelled at 26% implied volatility, not taken from a live chain, and real ICE quotes are often wider. Most long calls expire worthless. Past performance, including any illustrative example shown here, is not a reliable indicator of future results.

Management and adjustment

At this tier you do not adjust, you close. There is no short leg to repair and nothing to roll down without turning one bad trade into two. Three named rules:

  • ROLL WHEN: the thesis is intact, the option is profitable and expiry is inside 30 days. Close the December call and buy the March one as two separate limit orders, and treat it as a new trade with a new maximum loss.
  • DO NOT ROLL to rescue a loser. That is buying more time value with money already lost once, and it is how a defined-risk trade stops being defined-risk.
  • CLOSE, DO NOT HOLD: if IV spikes while you are in profit, because the vega gift reverses; if results, an ex-dividend date or an index review turns up in your window after entry; or if you can no longer state the thesis in one sentence.

Exit rules

  • Profit target: close at +50% of premium paid — the call at 70.5p, about £232.
  • Stop: close at −50% of premium, a £237.80 loss here. Mechanical, checked on the daily close.
  • Time stop: close at 21 days to expiry whatever the P&L — Friday 27 November 2026. The gamma boundary, not negotiable.
  • Delivery-avoidance exit: close before 16:30 London on Friday 18 December 2026, when the ICE December series stops trading. An ITM call left to expire is exercised, and you are buying 1,000 BP shares for £5,000 plus £25 of SDRT whether you wanted them or not.

If all four are silent, do nothing. Doing nothing is a position.

🇬🇧
UK tax and wrapper treatmentBuying the call is an acquisition, not a taxable event. Everything after it is one. Close it and you have a disposal on ordinary CGT rules, measured against premium plus commission (HMRC CG55536). Let it lapse and it is still a disposal: abandonment normally is not one, but quoted, traded and financial options are excepted by TCGA 1992 s.144(4), so the £471.40 is an allowable loss in 2026/27 (CG12340). Exercise it and there is no disposal of the option at all: under s.144(3) the option and the share purchase are a single transaction, so the premium joins the shares' base cost — £5,496.40 in Branch E. Physical delivery of UK shares also triggers SDRT at 0.5% of the consideration (STSM113030), £25.00 here. Options of the same series pool into a s.104 holding. There is no holding-period test in UK CGT: 18% or 24% turns only on your unused basic-rate band in the year of disposal, above the £3,000 annual exempt amount — so the £427.20 gain costs £0, £76.90 or £102.53. Wrapper: GIA only. HMRC's guidance for ISA managers lists "futures or share options" among the things qualifying shares do not include, so no option can sit in a stocks and shares ISA and there is no broker workaround. HMRC does not itself bar options from a SIPP, but almost no UK administrator permits them — check your provider's documentation. One long call generates one CGT event per cycle: a close, a lapse, or a merged exercise. The simplest tax profile in this curriculum, and a reason to start here.

Margin and broker reality

A cash account is enough. A long call is fully paid, so there is no initial or maintenance margin and no buying-power reduction beyond the £471.40. You need basic long-option permission via an appropriateness assessment, not uncovered-option permission. The UK obstacle is access: Hargreaves Lansdown, AJ Bell and Trading 212 offer no options in any account, so this is an Interactive Brokers or Saxo trade. The bigger cost is the ICE spread — on a thin UK series a 10% bid-ask outweighs every commission here. Keep £5,025 free if you intend to exercise.

⚠️
The biggest long call mistakeBuying cheap, far out-of-the-money, short-dated calls because the percentage return in the fantasy scenario looks enormous. A 5p weekly costs £50 a contract and feels harmless, which is exactly why people buy ten. The mechanism that destroys it: the premium is 100% time value against a delta near 0.10, so it needs a large move in a short window merely to break even, and theta takes the whole premium on the way there even when the direction is right. The share can rise and you can still lose everything. The hard rule, no exceptions at this tier: delta ≥ 0.60 AND extrinsic ≤ 40% of premium AND DTE ≥ 60. Fail one, do not buy it.
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Long call golden rules(1) Write the maximum loss in pounds before placing the order and check it against 2% of the account. (2) Buy delta 0.60–0.70 and 60–120 days: intrinsic value is what makes being roughly right pay. (3) Never buy into an IV rank above 60, or into results week unless the event is the thesis. (4) Take +50% and close; the 21-day time stop overrides your opinion. (5) Sell rather than exercise unless you want 1,000 shares and have the £5,000. (6) Log the trade the day you open it — date, underlying, strike, expiry, contract size, premium, commission, FX rate — because the CGT return needs it and reconstructing it in January does not work.

What to trade instead

Simpler: buy the shares. Same view, no expiry, no decay, dividends included. The trade-off is capital — £5,300 against £471.40 — and a downside not capped at a number you chose.

More precise, from the tier above: a bull call spread sells a higher-strike call against your long one, cutting the premium and the breakeven at the cost of capping profit. Choose it when you have a price target rather than a direction. For a view longer than a year, a LEAP buys the same exposure with less time value per month, and later becomes the long leg of a poor man's covered call.

First-trade checklist

Clear the paper-trade gate first: manage three long calls in a simulated account and hold one to expiry so you have watched theta work. Only then:

  1. Open a GIA with options permission, answering the appropriateness assessment honestly.
  2. Open the transaction tracker before the first trade: date, underlying, leg, open or close, premium, contract size, FX rate, tax point.
  3. Read the contract specification: shares per contract, exercise style, settlement, last trading day, tick value.
  4. Screen the series against the entry table — IV rank, DTE, delta, spread, open interest.
  5. Write down the max loss in pounds, the breakeven, the profit target, the stop and the time-stop date.
  6. Place a limit order at or inside the mid. Never a market order on an option.
  7. Diarise the time-stop date and the last trading day the moment the fill confirms.

Risk statement

Listed options are complex instruments and most retail long-option positions expire worthless. This is educational material about mechanics and UK tax treatment, not a recommendation to trade BP or anything else, and it takes no account of your circumstances. The worked example is modelled, not a live quote. If your trading becomes frequent enough to put the investor-versus-trader boundary in question, that is one for a qualified adviser.

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