What is the difference between a linear and an inverse futures contract on Kraken?

Understanding Futures Contracts on Kraken

Futures contracts on Kraken allow traders to speculate on the future price of an asset without owning the underlying cryptocurrency. These contracts are settled in either the quote currency or the base currency, depending on the contract type. The two primary types of futures offered by Kraken are linear futures and inverse futures. Both are leveraged instruments, enabling traders to open positions larger than their initial margin. However, the settlement mechanism, profit/loss calculation, and collateral handling differ significantly between them. Understanding these differences is crucial for risk management and strategy development.

What Is a Linear Futures Contract?

A linear futures contract is settled in the quote currency—typically USD or USDT. For example, in a BTC/USD linear futures contract, both the position size and the profit or loss (PnL) are denominated in USD. This makes it intuitive for traders who prefer to track their gains and losses in stablecoin or fiat terms. The margin required to open a position is also posted in the quote currency, which simplifies risk exposure assessment.

• The contract size is expressed in the base asset (e.g., BTC), but value is calculated in USD.
• PnL is linear with respect to price movement in USD terms.
• Margin and collateral are held in USD or USDT, reducing exposure to base asset volatility.
• Liquidation prices are calculated based on USD-denominated maintenance margin.

This structure is particularly suitable for traders who want to avoid volatility in their collateral and prefer stable accounting of profits.

What Is an Inverse Futures Contract?

An inverse futures contract is settled in the base cryptocurrency. For instance, a BTC/USD inverse futures contract is denominated and settled in BTC, even though the underlying price reference is in USD. This means that when a trader opens a long or short position, the PnL is calculated in BTC, not USD. The margin is also posted in the base asset—BTC in this case.

• Profit and loss are measured in the base cryptocurrency, so gains or losses depend on BTC’s value at settlement.
• Contract value is fixed in USD terms, but the number of BTC received or paid varies with price.
• Collateral is in BTC, exposing traders to BTC price volatility even if the trade is directionally neutral.
• As BTC’s price changes, the BTC-denominated value of the contract fluctuates inversely to the USD price.

This design allows traders to hedge or speculate using BTC as both collateral and settlement asset, which can be advantageous in certain hedging strategies.

How Profit and Loss Are Calculated Differently

The method of calculating PnL differs fundamentally between linear and inverse contracts due to their settlement currencies.

For a linear futures contract:

• A long position profit is calculated as: (Exit Price - Entry Price) × Contract Size
• The result is in USD, so a 10% increase in BTC price directly translates to a 10% USD gain.
• Example: Buying 1 BTC worth of BTC/USD linear futures at $30,000 and exiting at $33,000 yields a $3,000 profit in USD.

For an inverse futures contract:

• The PnL formula is: Contract Size × (1 / Entry Price - 1 / Exit Price)
• The result is in BTC, so the same price move yields a different BTC amount depending on price levels.
• Example: Opening a short position on 10,000 USD of BTC inverse futures at $30,000 and closing at $25,000 gives: 10,000 × (1/30,000 - 1/25,000) = 0.0667 BTC profit.

This inverse calculation means that profits in BTC accelerate as the price drops for short positions, and vice versa for longs when price rises.

Impact of Volatility on Collateral and Liquidation

The choice between linear and inverse contracts affects how collateral volatility influences trading outcomes.

In linear contracts:

• Since margin is held in USD or USDT, the value of the collateral does not fluctuate with BTC’s price.
• Liquidation depends only on the price movement of BTC against USD.
• Traders can better predict liquidation levels because the margin value remains stable.

In inverse contracts:

• Margin is held in BTC, so if BTC’s USD price drops, the USD value of the collateral drops even if the position is profitable.
• A falling BTC price reduces the USD value of the margin, increasing the risk of premature liquidation despite a correct directional bet.
• Conversely, a rising BTC price increases the USD value of BTC collateral, improving buffer against liquidation.

This dynamic makes inverse contracts more complex to manage during high volatility, especially for long positions where BTC’s price decline can erode USD-equivalent margin.

Use Cases and Strategic Considerations

Traders select between linear and inverse futures based on their hedging needs, exposure preferences, and accounting frameworks.

Scenarios favoring linear futures:

• Traders want stable PnL measurement in USD.
• They are short-term speculators using stablecoins as primary capital.
• They seek to avoid cryptocurrency volatility in their margin.
• Institutional traders who report in fiat and require predictable risk metrics.

Scenarios favoring inverse futures:

• Miners or long-term holders use BTC as collateral to hedge against price drops without selling.
• Traders aiming to accumulate more BTC through shorting in a bear market.
• Entities that want to maintain BTC exposure while managing USD-denominated liabilities.
• Strategies where BTC-denominated gains are desirable, such as compounding in native asset.

Kraken provides both types to accommodate diverse trading objectives, allowing users to align contract choice with their financial goals and risk tolerance.

Frequently Asked Questions

Can I switch from an inverse to a linear contract on the same trading pair?Yes, Kraken lists both linear and inverse versions of popular futures pairs like BTC/USD. You can close a position in one contract type and open a new one in the other. However, this involves two separate transactions and may incur fees or slippage.

Does Kraken charge different funding rates for linear and inverse futures?Funding rates are determined by market demand and are applied differently. Inverse contracts often have funding rates paid in BTC, while linear contracts use USD or USDT. The rate itself varies based on the specific contract’s open interest and price divergence from spot.

Are leverage limits the same for linear and inverse contracts?Leverage availability depends on the contract and market conditions. Kraken may offer different maximum leverage for linear versus inverse contracts due to risk profiles. Inverse contracts, due to BTC-collateral volatility, might have more conservative leverage caps.

How do I view my PnL in the Kraken interface for each contract type?In the Kraken Futures dashboard, linear contracts display PnL in USD or USDT, while inverse contracts show PnL in BTC or the base cryptocurrency. Position details include the settlement asset, making it clear which denomination applies.