Rekt Report: funding can liquidate a position that never moved

Here is the sleight of hand that catches people. Funding is quoted against your notional — the full size you control — but it is paid out of your margin, the sliver of real money you actually posted. Leverage is exactly the ratio between the two, so the cost of funding measured against the capital you can lose is the quoted rate times your leverage. That one multiplication is where the danger hides.

Take a typical rate. A 0.01% eight-hour funding rate is charged three times a day, so 0.03% of notional per day. On a 25x position that is 0.03% × 25 = 0.75% of your margin — every single day, with the price frozen. Annualize it: 0.03% a day is about 11% a year on notional, but on the margin of a 25x position it is roughly 274% a year. You would never knowingly pay a 274% interest rate. Held long enough, a leveraged perp charges exactly that, and debits it straight from the buffer that stands between you and liquidation.

Now turn up the market. In an overheated rally, funding on a crowded long routinely spikes to 0.1% per eight hours or more. Put $1,000 of margin into a 25x long — a $25,000 position — at that rate:

At the mania rate, funding alone would withdraw your entire $1,000 margin in about thirteen days if the price never moved a cent — and because each payment shrinks your balance, your liquidation price creeps toward you the whole time. You do not need to be wrong. You just need to be patient in the wrong direction of the carry.

The number that actually matters: break-even move

Funding reframes every hold as a hurdle. Before a trade is genuinely green, price has to move far enough in your favour just to cover the funding you have already paid. At the calm 0.01% rate on that 25x position, a one-week hold costs $52.50, which is a 52.5 / 25,000 = 0.21% move you must make before you have broken even on carry alone. That sounds tiny — until you stack it on top of the round-trip trading fees and the spread, and realize your take-profit needs to clear all three before a single dollar is yours. At the mania rate the weekly hurdle is over 2% before fees. The funding rate break-even calculator does this arithmetic for your exact size, leverage, rate and holding period, and reports the days-to-eat-margin figure directly.

Sometimes the carry is the trade

Flip the sign and the same mechanic pays you. When funding is strongly positive, the shorts are being paid to hold. A delta-neutral position — long the spot, short the perp — collects that funding while carrying almost no price risk, which is the entire basis of funding-rate arbitrage. The break-even and the APR on notional are precisely the numbers that trade lives or dies on: a 0.1% rate is about 109% a year on notional, a genuinely large yield, but it evaporates the moment the crowd unwinds and funding normalizes. The tool works both ways — set your direction to short and it shows the carry as income instead of cost.

• Read funding against margin, not notional. "0.01% is nothing" is true on notional and false on your capital — at 25x it is 0.75% a day. Multiply the rate by your leverage before you decide it's negligible.
• Price the hold, not just the entry. Put your size, leverage, rate and days into the funding break-even calculator and read the break-even move and days-to-eat-margin before you commit to holding.
• Treat high funding as an expiry date. If days-to-eat-margin is in single digits, you are renting the position by the day — that is a scalp, not a swing, no matter how strong the thesis.
• Net it out at the exit. Confirm your true result after funding, fees and slippage on the real futures profit calculator — the headline PnL almost always flatters you.

Liquidation gets all the attention because it is loud and instant. Funding is the quiet version: no wick, no news, just a small withdrawal three times a day that leverage magnifies and time compounds. Know the rate, multiply it by your leverage, and decide whether you are being paid to hold — or paying for the privilege.

Method: daily funding = notional × (8h rate) × 3; % of margin per day = daily funding ÷ margin, which equals leverage × 8h rate × 3; funding APR on notional = 8h rate × 3 × 365; days to eat margin = margin ÷ daily funding, holding price flat and the rate constant; break-even price move = total funding ÷ notional. Worked example uses $1,000 margin at 25x ($25,000 notional). Rates spike and fall, so treat any APR as a snapshot; real fees, spread and slippage make outcomes worse, not better. Not financial advice.

• Funding rate break-even calculator — daily carry, funding APR and how many days funding alone eats your margin
• Funding fee calculator — the funding paid on a single position over time
• Real futures profit calculator — your true PnL after fees, funding and slippage
• Liquidation calculator — the exact price your leverage gets wiped out
• Fee drag calculator — what trading fees alone cost your account over a year