CFD

Also known as: Contract for Difference

Retail's leveraged mirror of any market: pay or receive the price difference, own nothing.

3 min read · 584 words · Updated

1 · SnapshotThe one idea to remember
Key intuition: a CFD is a side bet on a price with a built-in loan. The leverage that makes wins feel big makes ordinary volatility lethal.
2 · BeginnerWhat is it, really?

A CFD is a deal with your broker: when you close the position, one of you pays the other the difference between the opening and closing price of some underlying — a share, index, currency pair or commodity. Price rose and you were long: the broker pays you the difference. Price fell: you pay.

You never own the underlying — no shares, no voting rights, no exchange trade. It is pure price exposure with heavy leverage: with 10% margin, €1,000 controls €10,000 of exposure, so a 5% market move is a 50% move on your money.

CFDs are marketed on convenience: one account, thousands of markets, easy short selling, tiny ticket sizes. Regulators' data shows the sobering flip side: the large majority of retail CFD accounts lose money — a statistic brokers in Europe must print on their own ads.

Linear payoff: the difference between closing and opening price, times position size — leveraged by margin.
F₀Long CFDUnderlying price at expiryProfit / loss

Point at a line to pick it out from the others.

Your counterparty is the broker, not the market
Youthe clientThe brokeryour counterpartyThe marketwhere the broker hedges1Margin — a fraction of theexposure3An overnight financingcharge4The price difference, ifyou gained5More than your margin,possibly2The broker hedges, or not

a paymentonly if a condition is met

Every arrow here points at the same firm. That is the fact the product's name does not carry.

Opening the position

  1. You → The broker You post a deposit against a position many times its size. No share is bought and nothing is registered in your name.
  2. The broker → The market Whether your trade is hedged in the market or simply held against other clients is the broker's decision, not yours.

Every night it stays open

  1. You → The broker Charged on the full exposure, because the broker is funding the part you did not pay for. It is the cost that makes a CFD a poor long-term holding and it accrues whether the position is winning or not.

Closing it

  1. The broker → You Settled in cash against the same broker that set the price you opened at.
  2. You → The broker A gap through your level can leave you owing more than you deposited unless negative-balance protection applies where you are.
Asset class
Equity / multi-asset derivatives
Instrument type
Bilateral difference contract
Traded
OTC with a broker
Typical users
Retail traders (banned in the US)

Which risks decide the outcome

Not how risky this is, and not a rating — there is deliberately no total. It says which of five failure modes drives what happens here, in the same order on all 129 products so they can be compared. This publication's own reading; see the notice below.

  • Marketdecides it
  • Creditmatters
  • Liquiditybarely applies
  • Fundingmatters
  • Operationaldecides it

What decides it here. Your counterparty is the broker that also sets the price. Financing accrues nightly on the full exposure, and a gap through your level can leave you owing more than you deposited.

What the five mean, and which one decides where →

3 · IntermediateHow it works in practice

The cost stack

  • Spread: the broker's quote is wider than the underlying market — paid on every round trip.
  • Overnight financing: long positions are charged (benchmark rate + ~2.5–3%) per day held; shorts may earn or pay. Holding a CFD for months costs far more than owning the asset.
  • Currency conversion fees on foreign underlyings, plus occasional guaranteed-stop premiums.

Margin mechanics

Positions are marked continuously. Fall below maintenance margin and the broker issues a margin call — or simply auto-liquidates your position at market. EU rules cap retail leverage (e.g. 30:1 FX majors, 5:1 single stocks), mandate negative-balance protection, and ban bonuses.

Who is on the other side?

Your counterparty is the broker. Some hedge client flow in the underlying ("A-book"); many internalise it ("B-book"), meaning your loss is literally their revenue — the conflict of interest behind much of the sector's regulatory history. The US bans CFDs outright; the UK/EU permit them with restrictions.

Worked example: long €10,000 of an index CFD on €500 margin (20:1). Index −3% intraday → −€300, 60% of your margin gone; the platform closes you out near the low. The index recovering tomorrow no longer helps.
4 · AdvancedPricing & valuation

Pricing: a rolling forward at zero basis

Economically, a CFD is a total return swap in retail clothing: price return exchanged against financing, reset continuously. Fair pricing is spot tracking with a financing accrual:

$$ \text{P\&L}_{t} = Q\,(S_t - S_0) - Q \sum_{d} S_d\,\frac{r_d + m}{360} + \text{div adjustments} $$
What the symbols mean
  • ta point in time
  • Sthe price of the underlying today
  • rthe interest rate, per year

where \(Q\) is size, \(m\) the broker's financing markup, and cash dividends are credited to longs / debited from shorts on ex-dates (CFDs are price-return instruments with manual dividend pass-through).

The broker's book

A CFD provider runs a risk engine over aggregate client positions: internalise offsetting flow, hedge net residuals in futures/cash, and manage the B-book with statistical confidence that leveraged retail flow loses to spread + financing over time. Its risk is gap events (SNB 2015 broke several brokers when negative balances exceeded client equity) — hence guaranteed-stop pricing as a barrier-option premium:

$$ \text{GSLO fee} \approx \text{price of a one-touch put at the stop level} $$

Regulatory economics

Leverage caps are set from close-out probability models: with volatility \(\sigma\) and leverage \(L\), the probability of hitting a 50% margin close-out within horizon \(T\) grows with \(L\sigma\sqrt{T}\) — the basis for asset-class-specific caps.

The formulas above are standard textbook formulations, simplified for teaching. They explain the mechanism — they are not a valuation tool, and they will not reproduce a dealer’s price.

5 · Desk notesHow practitioners think about it
Practitioner note: replicate any CFD trade's cost with listed futures or ETFs before placing it — for anything held longer than days, the listed version usually wins by construction.

Now say it back

Close the page and give CFD in four sentences. It takes a minute and it is the only way to find out whether reading it was enough.

  1. Who wants what — two parties wanted opposite things badly enough to write it down.
  2. What the contract obliges, and when — not the payoff; the obligation.
  3. Where the money comes from — name the source, or you have described a hope.
  4. What makes it lose — the ordinary way, not the dramatic one.

Do it with a clock → · why these four

Put CFD beside any other instrument →

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Where this instrument shows up elsewhere

Information and education only. Every page, figure and calculator on this site exists to explain how financial instruments work. Nothing here is investment, tax or legal advice, a recommendation, or a valuation you can rely on. Full disclaimer