Crypto derivatives: margin, funding, and liquidation

Exposure without ownership

A derivative’s value depends on a reference asset, rate, or index. A crypto futures position may settle in cash or under other contract-specific terms rather than deliver a token to a wallet. Perpetual contracts commonly have no scheduled expiry and use recurring payments to encourage alignment with a reference market. Products marketed as perpetual-style may have different legal and expiry structures, so the contract specification outranks the product nickname.

A fully paid spot position can lose its market value, but does not ordinarily face margin liquidation merely because its price falls. A leveraged derivative can be closed by the venue when collateral becomes insufficient. That distinction changes the path of outcomes: being correct about a price months later does not help if the position was liquidated during an earlier adverse move.

Margin is collateral, not maximum loss

Notional exposure measures the economic size of the position. Margin is the collateral supporting it. If a hypothetical $10,000 linear position is supported by $1,000 of margin, its initial leverage is ten times. A 2% adverse price move corresponds to roughly $200 of trading loss before costs, which is 20% of the starting margin. The percentage move in collateral equity is much larger than the market move.

Maintenance requirements, fees, mark-price rules, collateral values, and liquidation charges determine when intervention occurs. The liquidation threshold is not generally just the point at which initial margin reaches zero. Cross-margin arrangements may expose other eligible account collateral, while isolated-margin designs allocate collateral differently. Product terms can permit losses beyond the initial deposit; protection should never be assumed.

Funding is a cash flow

In many perpetual markets, funding payments move between long and short positions at scheduled intervals. A positive rate commonly means longs pay shorts, but the venue’s sign convention and formula must be checked. Funding can change direction. A displayed annualized number is not a guaranteed future yield, and an estimate for the next interval is not the same as a payment already realized.

For a simple linear contract, a hypothetical funding payment may be calculated as notional value multiplied by the interval’s funding rate. A $10,000 position at 0.01% incurs a $1 payment for that interval if it is on the paying side. Multiply by the actual eligible intervals, not by an assumed daily frequency. Fees, changing notional, and collateral denomination complicate the complete result.

The reference price matters

The last traded price, index price, and mark price may differ. A venue can use a mark price to assess unrealized profit and margin, while an order executes against available liquidity. An index may combine prices from several markets with specific exclusion rules. Understanding these definitions explains why a liquidation might not line up neatly with a single candle on a chart.

A paper-trading worksheet should record entry and exit fills, contract multiplier, fees, funding, and collateral changes separately. Stress it with a price gap and a temporary inability to trade. Hedged positions can still face basis risk, mismatched collateral, or liquidation on one leg. Availability and regulation vary by jurisdiction; this lesson explains mechanics and is not an invitation to use leverage or bypass local restrictions.

A funding estimate is not a holding-period return

A funding quote belongs to a particular interval and contract. Turning one observation into an annual percentage quietly assumes that a similar rate persists, that the position remains open and that the relevant notional stays comparable. None of those conditions follows from the quote. Coinbase’s explanation, for example, describes the direction of payments between long and short positions; it does not turn a positive funding observation into a guaranteed income stream. Check the funding mechanism directly.

For a fictional constant $10,000 notional position, three successive funding rates of 0.01%, 0.02% and −0.01% produce payments of $1, $2 and a $1 receipt for a long under the usual positive-rate convention: a net $2 cost. Applying the first rate to all three intervals would give $3 instead. Real contracts can also change the notional used for the calculation, so reconstruct the actual sequence rather than averaging a few screen captures.

Keep a funding journal with the interval, applicable rate, valuation basis, sign and realized payment. Put trading profit and loss on a separate line. Receiving funding while the contract moves against you is not necessarily a profitable outcome; a small recurring cash flow can be overwhelmed by one price move or a liquidation charge.

A hedge can be balanced and still run out of cash

Consider a paper portfolio that buys a token in spot and shorts an equivalent linear derivative. If their prices move together, much of the directional exposure may offset. But the derivative can require additional collateral before gains on the spot holding are accessible. The two positions can be economically related while their payment calendars, custody arrangements and withdrawal routes are not.

Stress the sequence, not just the final total. In your scenario, let the token rise sharply, the short require more margin and the spot venue temporarily delay withdrawals. Can the derivative account meet its obligation without assuming an instant transfer? Next, reverse the price move and let funding change sign. This exercise reveals why a strategy described as “market neutral” is not automatically neutral to funding, basis, operational or counterparty risk.

Do not solve the example by assuming that leverage can simply be increased. First identify the separate cash requirements and the conditions under which the supposed hedge stops matching. A terminal spreadsheet profit is not money that was necessarily available at every point along the path.