i was so not a funding rate guys, untill i was...
so for example here, my boros position is showing a green PnL number but it is soooooo not true...
what i am holding is 1% of a bybit HYPEUSDT position i closed badly, long at 6.50% fixed with 11 settlements and 3.67 days left. the green figure on the positions tab is funding accrued back when the position was full size, when every settlement was printing 10.95% against my fixed. the realised loss from the close was nearly 2x that accrual in the opposite direction and it is simply not in the field. the market is net negative and the screen says otherwise...
where the rest of it lands is already narrow...
mark to market decays to zero at maturity so carry is all that is left. if bybit keeps printing its 10.95% baseline it settles +0.045% of notional. at the mean since i opened, 6.32%, it settles -0.002%. flat funding gives -0.065%, deeply negative funding gives -0.116%. the entire realistic range is about +0.045% to -0.116%, which is noise on a margin slot i would rather have back...
next one is hyperliquid HYPEUSDC, 30 october expiry. implied 9.78% against a hyperliquid median of 10.95%, so i would be paying 11% below median to be long funding. carry is 0.167% of notional over 38.5 days...
the problems with it are honest ones. the spread is 57.1bp on a 9.89% mid, so crossing hands over 36% of that carry immediately. and hyperliquid funding is hourly and uncapped, stdev 12.70%, 8% of prints negative, range from -20% to +133%. daily implied vol of 0.362% against sensitivity of 0.0010559 per YU means a daily mark to market swing 8.8x larger than a day of carry. on the bybit market that ratio was 1.0x...
per unit of notional: carry to maturity 0.167%, a normal day moves 0.038%, a three sigma day moves 0.115%. one bad day is 69% of the entire expected carry, and that ratio does not change with size. sizing does not fix it, only holding period does...
so i bid it rather than cross, size it so a three sigma day is boring, and write the exit before entering. out if implied closes above the hyperliquid median three days running because that kills the thesis, otherwise hold to 30 october...
four things i would keep in mind on any funding position...
1. price carry off median settled prints over a window as long as you intend to hold. never off the underlying APR in the UI, which is an unsettled forecast that flips inside the period. bybit was showing me -3.66% while the prints around it kept landing at 10.95%...
2. multiply carry by remaining life before you get excited. a good annualised rate on three days left is nothing...
3. check the spread against that carry, not against the rate. a third of the edge can be gone on entry...
4. and run noise against carry. near 1x you are being paid to wait. near 9x you are taking a rate view whether you meant to or not, and the only thing that saves you is not touching it...