How to Understand Insurance Fund in Perpetual Futures

By Editorial Team · July 2026

Who This Is For

This guide is for intermediate crypto traders who already know the basics of perpetual futures but want to understand how insurance funds work, why they matter, and how they protect both exchanges and traders from cascading liquidation losses.

What You’ll Need

• A basic understanding of perpetual futures contracts and leverage.
• Access to a futures exchange that publishes insurance fund data (Binance, Bybit, dYdX, or Kraken).
• Willingness to read order book and liquidation data — no coding skills required.
• Patience to learn a concept that most traders skip but that can save you from unexpected losses.

Step 1: Understand What Perpetual Futures Liquidation Actually Means

Before we talk insurance funds, we need to get clear on liquidation mechanics. When you open a leveraged perpetual futures position, the exchange requires you to post margin — typically 1% to 50% of the notional value, depending on the leverage you choose. If the market moves against you and your margin falls below the maintenance margin threshold, the exchange forcibly closes your position.

But here’s the tricky part. Liquidation doesn’t always happen at the exact price that wipes out your margin. In fast-moving markets, especially during high volatility events like a sudden crash or a liquidity squeeze, the exchange may not be able to fill your liquidation order at the bankruptcy price. This gap — between the bankruptcy price and the actual fill price — creates a loss that has to go somewhere.

Without an insurance fund, that loss would be socialized among all traders holding positions on the exchange. That means if a large trader gets liquidated and the exchange can’t cover the loss, every other trader might see a deduction from their account. That’s bad for everyone. The insurance fund exists precisely to absorb this gap and prevent socialized losses.

So the first step is simply internalizing this: liquidation doesn’t always mean your position closes cleanly at zero. Sometimes it closes at a loss that exceeds your margin, and that excess loss needs a source of funds to cover it.

Step 2: Learn How the Insurance Fund Gets Funded

Insurance funds don’t appear out of thin air. Exchanges build them up over time using a specific mechanism tied to the liquidation process itself. When a trader’s position is liquidated, the exchange takes over the position and attempts to close it at the best available price on the order book. If the exchange manages to close the position at a price better than the bankruptcy price — meaning they got a better fill than needed to break even — the surplus goes into the insurance fund.

Think of it as a small buffer. For every liquidation that executes favorably, the fund grows. For every liquidation that executes unfavorably — where the fill price is worse than the bankruptcy price — the fund shrinks. Over time, the fund size fluctuates based on market conditions, trading volume, and how efficiently the exchange’s liquidation engine operates.

Most major exchanges publish real-time or daily snapshots of their insurance fund balance. For example, Binance’s insurance fund for BTC/USDT perpetual futures has historically held between 100 million and 400 million USDT, depending on market activity. You can check these numbers on the exchange’s status page or through third-party analytics tools.

Bybit Funding Rates: My 30-Day Futures Experiment traders often ignore fund size, but it’s a useful metric. A growing fund suggests the exchange’s liquidation engine is efficient and that the market is relatively orderly. A shrinking fund — especially during calm markets — could indicate systematic issues with how liquidations are handled.

Step 3: Understand the Bankruptcy Price vs. Liquidation Price

This is where most confusion happens. The liquidation price is the price at which the exchange triggers the forced closure of your position. The bankruptcy price is the price at which your entire margin is wiped out — meaning your position goes to zero from your perspective, but the exchange still needs to close the trade in the market.

Here’s a concrete example. Say you open a 10x long on Bitcoin perpetual futures at $60,000 with $1,000 margin. Your position size is $10,000. The liquidation price might be around $54,500. But the bankruptcy price — where your margin is completely gone — is $54,000. If the market drops to $54,500, the exchange liquidates your position. But if the fill price is $53,800 — worse than the bankruptcy price — the exchange has a loss of $200 that needs to be covered.

That $200 comes from the insurance fund. If the fund is empty or insufficient, that $200 would be deducted from the accounts of other traders holding profitable positions. That’s called auto-deleveraging (ADL), and it’s the mechanism exchanges use when the insurance fund can’t absorb the loss.

So the insurance fund is essentially the first line of defense between you and ADL. As long as the fund has enough capital, you won’t see your profits clawed back when someone else gets liquidated at a bad price.

Step 4: Recognize the Risks of a Depleted Insurance Fund

Now let’s talk about what happens when things go wrong. During extreme market events like the March 2020 COVID crash or the May 2021 China ban sell-off, insurance funds can be drained rapidly. If a single large trader with a massive position gets liquidated and the market is in freefall, the exchange may not be able to fill the liquidation order anywhere near the bankruptcy price.

In those moments, the insurance fund can drop by tens of millions of dollars in minutes. If the fund hits zero, the exchange activates auto-deleveraging. ADL works by targeting the most profitable traders and forcibly reducing their positions to cover the deficit. This is a cascading risk — if ADL hits a large trader, that trader’s position reduction can cause further price movement, triggering more liquidations.

This is why insurance fund size matters more than most traders realize. A fund with $300 million might seem like a lot, but if a single whale is holding a $1 billion position with 50x leverage, a 10% adverse move could produce a loss that dwarfs the entire fund. Exchanges mitigate this by imposing position limits and tiered margin requirements, but the risk is never zero.

As a trader, you can protect yourself by checking the insurance fund balance before opening large positions during volatile periods. If the fund is unusually low relative to historical averages, it might be wise to reduce your leverage or wait for conditions to stabilize.

Step 5: Monitor Insurance Fund Data and Use It in Your Strategy

You don’t need to become a data analyst to use insurance fund information effectively. Most major exchanges provide a public page showing the current fund balance, historical changes, and sometimes even a breakdown by asset. Here’s what to look for:

• Absolute fund size: Compare it to the open interest for that contract. A fund that covers 1-2% of open interest is typical for major pairs. Anything below 0.5% might be cause for caution.
• Recent trend: Is the fund growing or shrinking over the last week or month? A steady decline without corresponding market volatility could indicate structural issues.
• Large single-day drops: If the fund drops by more than 5-10% in a single day, it means a significant liquidation event occurred. This can be a leading indicator of market stress.

You can also use insurance fund data as a contrarian indicator. When the fund is very large relative to open interest, it suggests the exchange has a strong buffer against liquidation losses. That can be a sign of a relatively healthy market. When the fund is shrinking rapidly, it suggests that liquidations are becoming more costly, which often precedes higher volatility.

Some advanced traders even track insurance fund changes in real-time using WebSocket feeds from exchanges. This allows them to detect large liquidation events before they show up on the price chart. But for most traders, a simple daily check is sufficient.

Remember: the insurance fund is not a guarantee of safety. It’s a risk management tool that reduces the likelihood of socialized losses, but it doesn’t eliminate them. Always size your positions with the understanding that ADL could theoretically affect you during extreme events.

Common Pitfalls and Risks

⚠️ Risk: Assuming the insurance fund is infinite. Many traders believe the fund will always cover losses, but it can and does get depleted. During the 2022 LUNA crash, several exchanges saw their insurance funds shrink by over 50% in hours. Traders who kept full leverage through that period faced ADL. Mitigation: Check fund size weekly and reduce leverage when the fund is shrinking.

⚠️ Pitfall: Ignoring the difference between liquidation price and bankruptcy price. Traders often set stop-losses at or near the liquidation price, assuming that’s where their position will close. But if the market gaps through that level, the fill price can be much worse, triggering a loss that hits the insurance fund. Mitigation: Set your stop-loss at least 2-3% away from the liquidation price to account for slippage.

⚠️ Risk: Over-relying on insurance fund data as a timing indicator. Some traders try to predict market moves based on insurance fund changes, but the fund is a lagging indicator — it reflects what already happened, not what will happen. Using it to time entries or exits often leads to poor results. Mitigation: Use fund data as a risk assessment tool, not a trading signal.

This content is for educational and informational purposes only and does not constitute financial advice.

What Next?

Now that you understand insurance funds, take 10 minutes to look up the current fund balance for the perpetual contracts you trade most often — it’s the single best way to gauge the health of your exchange’s risk management system.

Sources & References

• Investopedia — Liquidation Definition
• CoinDesk — Insurance Funds Explained
• SEC — Investor Bulletin on Derivatives
• How to Use Cross Margin on Binance Futures Safely

— Editorial Team