UK retail options traders mostly use US S&P 500 options because they're liquid and well-known. But UK index options exist — FTSE 100 options trade on ICE Futures Europe (the successor to LIFFE), and FTSE 250 options also exist but with much lower volume. Key practical differences: FTSE 100 options are valued at £10 per index point (vs $100 for S&P 500), are quoted in index points with a minimum price movement of 0.5 points (£5.00), and are European-style — exercisable only at expiry, so they can never be assigned early. The standard contract expires on the third Friday of the delivery month, and ICE lists separate weekly and daily FTSE 100 option contracts alongside it. UK tax position is materially simpler — no foreign withholding tax issues, gains in CGT bands as for any UK security.
FTSE 100 options — contract specifications
- Underlying: FTSE 100 index (UKX).
- Contract code: ESX.
- Contract size: £10 per index point — so the contract is valued at £80,000 with the index at 8,000.0.
- Tick size: 0.5 index points = £5.
- Exercise style: European — ICE's specification reads "European style options only", with exercise by 18:30 on the Last Trading Day only. There is no early exercise and no early assignment.
- Expiry: Third Friday of the delivery month, with serial months listed out to two years. Longer-dated expiries, to a maximum of ten and a half years, are available on ICE Block only.
- Strike intervals: 25, 50, 100 or 200 index points, depending on how long the expiry has to run and how close the strike is to the money.
- Settlement: Cash-settled at the Exchange Delivery Settlement Price (EDSP) — no physical delivery.
- Exchange: ICE Futures Europe (formerly LIFFE).
- Hours: 08:00 to 16:50 UK time, electronic, with pre-open from 06:03.
European style: what it means for you
This is the single most consequential line in the specification for a UK retail trader, and it is the one most often assumed the other way round because almost all options education online is written about American-style US equity options.
Because ESX is European-style and cash-settled, a short FTSE 100 option cannot be assigned before the Last Trading Day. The early-assignment scenarios that dominate covered-call and cash-secured-put writing on individual shares — being called away the day before an ex-dividend date, or waking up to an unexpected stock position — do not arise here. Your short position is a marked-to-market obligation until 18:30 on the Last Trading Day, and then it settles in cash against the EDSP.
That is a genuine structural advantage over writing options on individual UK shares. It is not a licence to ignore the risk: the position can still move violently against you before expiry, and your broker can still close it for margin.
Premiums are quoted in index points, not pence. So a FTSE 100 call struck at 7,500 trading at a premium of 50.0 index points costs 50.0 × £10 = £500 per contract. There is no additional ×100 multiplier: the £10 per index point is the multiplier. The ×100 you may have seen belongs to US equity options, where one contract covers 100 shares — a cash-settled index option covers no shares at all. Always check the broker's contract specification before trading.
ESX is not the only FTSE 100 option ICE lists. There are also FTSE 100 Index Weekly Flex Options (FLX), on the same £10 per index point basis with Friday expiries, and Mini FTSE 100 Index Daily Options (8LX), valued at £1 per index point with expiries on each of the front five business days as well as the third Friday of the month. Both are European-style and cash-settled. Whether your broker actually gives you access to them is a separate question from whether ICE lists them.
FTSE 250 options
FTSE 250 (the mid-cap UK index) has options available — ICE FTSE 250 Index Options, contract code YFS — but trading volume is materially lower. Most retail traders find liquidity insufficient for active strategies. The specifications do not mirror the FTSE 100 contract, and assuming they do is an expensive mistake:
- Contract size: £2 per index point — one fifth of the FTSE 100 contract, not the same £10.
- Tick size: 0.5 index points = £1.
- Expiry: Four quarterly months only, on the March / June / September / December cycle — not monthly. Last trading day is the third Friday of the delivery month.
- Strike intervals: 50 index points.
- Exercise style: European — exercise by 18:30 on the Last Trading Day only, as with the FTSE 100 contract.
- Settlement: Cash-settled at the EDSP.
- Hours: 08:00 to 16:50 UK time, pre-open from 06:03.
The £2 multiplier is the figure that matters when you size a hedge. A FTSE 250 contract carries one fifth of the exposure per index point that a FTSE 100 contract does, so sizing a FTSE 250 position from the FTSE 100 specification would overstate your cover by five times. The quarterly-only cycle matters too: there is no near-month FTSE 250 option to roll into for most of the year.
Options on FTSE 250 ETFs are a different instrument again, not a like-for-like substitute. MIDD is the iShares FTSE 250 UCITS ETF (BlackRock — VMID is the Vanguard one). Listed options on the iShares fund trade on Eurex, not ICE, and their mechanics are the opposite of everything above: they are American-style, quoted in GBX with a 0.25 GBX minimum tick, over 100 index fund shares, and settled by physical delivery of those shares two exchange days after the last trading day. So they carry exactly the early-assignment and stock-delivery risk that the cash-settled European ICE index options do not. Eurex lists no options on VMID.
How FTSE 100 options differ from US S&P 500 options
| FTSE 100 options | S&P 500 (SPX) options | |
|---|---|---|
| Contract size | £10 per index point | $100 per index point |
| Tick size | 0.5 = £5 | 0.05 = $5 |
| Expiry | Monthly (3rd Friday), plus weekly (FLX) and daily (8LX) contracts | Monthly + weekly + daily |
| Exercise style | European — exercise at expiry only, no early assignment | European — exercise at expiry only, no early assignment |
| Liquidity | Moderate | Extremely high |
| Hours | UK trading hours (08:00-16:50) | Near 24x5 (Cboe Global Trading Hours, regular session and Curb) |
| Settlement | Cash, EDSP | Cash, AM expiration |
| UK tax | UK CGT bands, no W-8BEN needed | UK CGT bands; no US withholding on option gains (a W-8BEN only affects dividends on US shares you hold) |
Why most UK retail trade S&P 500 instead
- Liquidity: SPX is the deepest options market in the world. Bid-ask spreads are tight, even on far-out-of-the-money strikes.
- Density of expiries: SPX has expiries almost every trading day of the week. The FTSE 100 does have weekly (FLX) and daily (8LX) contracts as well as the standard monthly, but the volume in those contracts is a fraction of SPX's, and not every UK broker offers them.
- Hour coverage: SPX now trades near 24 hours a day, five days a week, through Cboe's Global Trading Hours session (20:15–09:25 ET) alongside the regular session and the Curb session. FTSE 100 options trade 08:00–16:50 UK time — 8 hours 50 minutes.
- Educational material: 95% of options education online is US-focused.
The cost of trading SPX from the UK: an extra layer of W-8BEN admin, slightly higher per-contract fees, and trading-hour overlap with your day job (US opens 14:30 UK time).
When FTSE 100 options make sense
- UK-tax-optimised approach. Gains are straight UK CGT — no foreign withholding complications.
- Hedging a UK-equity-heavy portfolio. If your holdings track the UK market, FTSE 100 puts are a cleaner hedge than S&P 500 puts — you are hedging the index you are actually exposed to, in the currency you are exposed in. The puts themselves have to sit in a general investment account: options are not qualifying ISA investments, so the hedge cannot live inside the wrapper it is protecting.
- UK-trading-hours preference. If you don't want to trade evenings or extended hours.
- No early-assignment risk. European-style exercise removes a whole category of management problem that comes with writing American-style options on individual shares.
FTSE 100 options worked example
Buying a FTSE 100 put for portfolio hedge
Your ISA holds £50,000 of UK equity ETFs (VUKE — Vanguard FTSE 100). FTSE 100 is at 8,000. You want hedge protection if FTSE falls below 7,500 in the next 60 days. The put has to be bought in a general investment account alongside the ISA, not inside it — options are not qualifying ISA investments.
| Buy 1 FTSE 100 7,500 put, 60-day expiry, premium 100 points | −£1,000 |
| If FTSE falls to 7,000: put has intrinsic value 500 points | £5,000 value |
| Premium paid £1,000, value at 7,000: £5,000 → profit £4,000 | +£4,000 |
| Your ETF loss (£50k → ~£43.75k at FTSE 7,000) | −£6,250 |
| Net household position | −£2,250 (vs −£6,250 unhedged) |
Insurance cost in a no-fall scenario: £1,000 (if FTSE stays above 7,500 to expiry, the put expires worthless). Premium cost vs portfolio: 2% of holdings for 60 days of below-7,500 protection.
Tax position
For UK residents trading FTSE 100 options in a GIA:
- Writing an option: the grant of an option is itself the disposal of an asset (TCGA 1992 s.144(1)), so the premium you receive is a chargeable gain in the tax year the option is granted — not in the year it expires. HMRC's Capital Gains Manual is explicit: "The full amount of the premium less any incidental cost of disposal are assessable as a gain arising when the option is written" (CG55536). Timing matters in practice: a FTSE 100 option written in March and expiring in April is taxed in the earlier tax year.
- If it lapses: nothing further happens. CG55536 again: "There is no effect on the grantor. Any CG charge in respect of the grant of the option remains."
- If it is exercised: s.144(2) treats the grant and the transaction that fulfils it as a single transaction, and any tax already paid on the premium in the year of grant is "set-off or repaid" (CG55536). Where the exercise falls in a later tax year than the grant, that may mean amending the return for the year of grant. Note that on a cash-settled index option there is no underlying to deliver and no share cost basis to adjust — the contract settles in cash against the EDSP.
- Buying an option: if an option you bought expires worthless, the abandonment is treated as a disposal and the premium you paid is an allowable capital loss.
- Bed-and-breakfasting (30-day rule): s.106A TCGA 1992 matches a disposal against acquisitions of the same asset within the following 30 days. For traded options that means options of the same series — same type, same underlying, same expiry, same strike (CG55535). A different strike or a different expiry month is a different asset and is not caught, so rolling a position out in time does not trigger it. And where it does apply it does not cancel the loss: it re-matches the disposal, so the loss is absorbed into the base cost of the option you reacquired rather than being lost.
- £3,000 annual CGT allowance applies (2026/27).
- Above allowance: 18% basic rate / 24% higher rate.
- Inside a SIPP (if permitted): tax-free.
See the tax worked examples for the full per-strategy treatment.
Sources and methodology
Contract specifications on this page are taken from ICE Futures Europe's own published product specifications for FTSE 100 Index Options (ESX) and FTSE 250 Index Options (YFS), checked against the ICE FTSE index derivatives product list for the weekly (FLX) and daily (8LX) contracts. Where the exchange and a broker's summary disagree, the exchange specification is the one that governs your contract. Tax treatment follows TCGA 1992 s.144 and HMRC's Capital Gains Manual at CG55536 (grantor of an option) and CG55535 (pooling and share identification for traded options). For complex options positions, see the tax adviser editorial recommendation. The methodology page documents sources.
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