If you've spent any time around perpetual futures, you've probably read the textbook explanation of funding: it's a periodic payment between longs and shorts that keeps the perp price tethered to the spot index. The textbook is correct, but it doesn't tell you what funding feels like in practice: what it looks like on the chart, what regimes it goes through, and which traders end up on which side of the payment when it does.
This post is the field guide. It's specifically about Hyperliquid, which does funding slightly differently from the binance-pattern CEXes most people learned on. If you're trading perps on Hyperliquid (or thinking about it), this is the bit that changes the math.
What funding actually is
A perpetual future is a derivative that, by construction, never expires. To keep it tracking spot, the exchange charges a periodic funding payment from one side of the book to the other:
- If the perp is trading above spot, longs pay shorts. (The perp is too rich; longs subsidize shorts to bring the price down.)
- If the perp is trading below spot, shorts pay longs. (The perp is too cheap; shorts subsidize longs to bring it up.)
The payment is small per period, but it compounds. A perp paying 0.01% per hour pays roughly 87% per year if you sit on the same side. Funding is the only force in a perp's life that consistently transfers PnL from one trader to another outside of the price moving.
What Hyperliquid does differently
Three things are worth knowing if you're coming from Binance, Bybit, or OKX.
1. Funding is paid every hour. Most CEXes pay funding every eight hours. Hyperliquid pays every hour, on the hour. That means the rate you see is roughly 1/8 of what you'd see on a CEX for the same annualized pressure, and it also means the rate is updated more frequently and is less prone to one-shot dislocations.
2. The premium index uses a longer window. Hyperliquid's funding is computed off a smoothed premium index, not a single snapshot. The smoothing dampens the kind of one-block manipulation that occasionally embarrasses CEX funding charts.
3. Liquidity is concentrated. Five or six perps have the great majority of the volume: BTC, ETH, SOL, HYPE, plus whatever's the meme of the week. Outside the top tier, funding is noisier and easier to push around with size. You should treat funding signals on a thin perp very differently from funding signals on ETH-PERP.
Reading the funding chart
Open up the funding chart for any liquid perp. You're looking for three things.
Sign
Is the rate positive or negative? Positive = longs paying shorts. Negative = shorts paying longs.
For most assets, in most weeks, funding is mildly positive. People want long exposure; the demand to hold long positions slightly exceeds the supply of short interest, so longs subsidize shorts a little to keep the perp tethered. This is normal. It's the resting state of a healthy market.
Magnitude
The interesting question isn't "is funding positive." It's "how positive."
A useful mental model: anything in the range of ±0.005% per hour is rounding error. Anything ±0.005% to ±0.020% per hour is signal. Anything outside ±0.020% per hour is unusual and worth a look.
Hyperliquid quotes funding per hour. If you're used to thinking in CEX-style 8-hour rates, multiply by 8 to compare. (Hyperliquid's 0.012% per hour ≈ a CEX's 0.10% per 8-hour period.)
Regime
This is the one that matters and the one most people don't look at. Funding has regimes: periods that last days or weeks where the rate clusters around a particular level.
There are roughly four regimes you'll see:
Tranquil. Funding sits within a tight band around zero. ETH does this for weeks at a time during slow periods. There's no edge in funding here; the signal is noise.
Trending bull. Funding holds positive, sometimes mildly elevated. Longs are paying, but they don't care because price is going up faster than the funding cost. This is the regime where being short for the funding payment is a great way to lose money. You collect 0.01% per hour and the asset rallies 8% over the weekend.
Trending bear. Mirror image: funding holds negative, shorts pay, price falls. Same trap on the other side.
Stretched. Funding goes well past the normal band (you'll see ±0.030% to ±0.100% per hour or more) usually during a sharp move. This is the rare regime where there's an actual edge in fading the crowd, and it's the regime most "funding harvester" strategies are designed around. It's also where you can get hurt the worst, because a stretched funding rate often means a short squeeze (or long capitulation) is in progress and the price is moving against the funding side, fast.
What good signal looks like
A clean "fundable" setup, in our experience, has three things going on at once:
- The rate has crossed an absolute threshold (say -0.012% per hour or worse for a contrarian long, or +0.020% per hour or better for a contrarian short).
- The rate has been outside the normal band for more than one epoch. A single hour of stretched funding is noise; a stretched rate sustained for two or three hours is a signal that one side is genuinely overcrowded.
- Open interest is building, not bleeding. Stretched funding plus rising OI means the crowd is still piling on; that's the asymmetry you want to fade. Stretched funding plus falling OI means the crowd is already capitulating, and you're late.
You can lift any one of these conditions and you'll have a strategy that loses money. The intersection is what works.
Where it goes wrong
Funding harvesting has two failure modes that show up over and over.
The volatility regime fooled you. Funding signals that work in tranquil markets (the kind where ETH grinds in a 5% range for a week) fall apart violently in high-vol regimes. When BTC realized vol is above 80%, a stretched funding rate is much more likely to mark the middle of a move, not the end. We hard-block funding trades when BTC vol is high. So should you.
The thin-perp problem. A funding rate of -0.04% per hour on, say, JTO-PERP looks dramatic but is a different signal than the same number on ETH-PERP. Thin perps are easier to push, and the funding rate reflects what one or two big shorts are doing, not a real crowd. Stick to perps with $50M+ daily volume for funding-based strategies, or accept that the false-signal rate will be much higher.
How Engine uses this
For full disclosure: this is also the signal that powers our public Funding Harvester strategy in the marketplace. The strategy is exactly the rules above, written as a STRATEGY.md file. It looks for a sustained absolute threshold, confirms with OI delta, skips high-vol regimes, and sizes positions modestly. The file is a few dozen lines and we publish it openly because the value isn't the rules (most of this post is the rules); the value is in operationalizing them tick by tick, and that's what the agent does.
If you want to fork it and see what's inside, it's in the marketplace. If you want to write your own funding strategy, hopefully this post has been a useful map. Either way, the funding chart is the most under-read piece of information on Hyperliquid. Worth getting comfortable with it.