BackPack vs Extended Funding Arbitrage
27 shared markets · net of estimated fees · updated every few minutesBackPack and Extended both quote 27 of the same perpetual markets, so a delta-neutral position can be split across the two and collect the difference in their funding. The widest spread on a market with real depth is ZEC — long Extended / short BackPack at 41.4% net APR — but the median across all shared markets is 22.5%, which is the number worth planning around.
The long leg is whichever venue prices funding lower for that market. It is a property of the MARKET, not of the exchange, and it flips as rates move: here 7 markets go long on BackPack and 20 on Extended. 23 markets clear 5% net APR, 20 clear 10%.
How this pair behaves
BackPack pays funding every 1h on 63 markets; Extended pays every 1h on 153 markets. Both sides settle on the same clock, so a position opened here collects or pays on both legs at once — the spread you see is the spread you get. BackPack quotes 63 perpetual markets in total and Extended quotes 153; the 27 they share are what this page ranks. Across its own book BackPack runs a median funding rate of 10.9% and Extended 5.3%, so the edge here comes from individual markets rather than from a standing gap between the venues.
Spreads by market
top 25 of 27 by net APR| Market | Long | Short | Net APR | Gross | 7d avg | Thin leg vol |
|---|---|---|---|---|---|---|
| MON | BackPack | Extended | 151.7% | 155.8% | +10.3% | $76K |
| XPL | Extended | BackPack | 69.9% | 72.6% | +16.6% | $21K |
| AERO | Extended | BackPack | 59.3% | 61.6% | +21.3% | $130K |
| PUMP | BackPack | Extended | 55.8% | 58.3% | +40.6% | $223K |
| XMR | Extended | BackPack | 50.2% | 54.2% | +9.8% | $191K |
| S | BackPack | Extended | 43.3% | 56.9% | +6.5% | $43K |
| W | Extended | BackPack | 42.1% | 45.1% | -44.0% | $44K |
| ZEC | Extended | BackPack | 41.4% | 43.4% | +23.5% | $2.1M |
| ENA | Extended | BackPack | 37.1% | 39.2% | -8.9% | $103K |
| AAVE | Extended | BackPack | 35.0% | 37.2% | +9.4% | $226K |
| FARTCOIN | Extended | BackPack | 29.9% | 33.0% | +10.6% | $42K |
| PENGU | BackPack | Extended | 28.4% | 31.3% | -12.9% | $120K |
| VVV | Extended | BackPack | 23.7% | 26.8% | +18.8% | $54K |
| WLFI | BackPack | Extended | 22.5% | 26.0% | +2.3% | $61K |
| VIRTUAL | Extended | BackPack | 17.2% | 20.2% | +10.8% | $32K |
| AVAX | Extended | BackPack | 17.1% | 19.7% | +10.7% | $108K |
| DOT | Extended | BackPack | 17.0% | 19.7% | +7.0% | $52K |
| PENDLE | Extended | BackPack | 16.3% | 18.8% | +15.1% | $215K |
| SEI | Extended | BackPack | 12.9% | 16.2% | +0.6% | $43K |
| ASTER | Extended | BackPack | 11.3% | 13.6% | +5.8% | $64K |
| CRV | BackPack | Extended | 9.7% | 12.3% | +17.6% | $106K |
| JUP | BackPack | Extended | 6.5% | 9.5% | +7.8% | $190K |
| BTC | Extended | BackPack | 5.6% | 7.4% | +1.8% | $133.0M |
| LDO | Extended | BackPack | 5.0% | 8.3% | -6.1% | $70K |
| JTO | Extended | BackPack | 3.7% | 6.2% | +33.6% | $108K |
Net APR subtracts entry and exit fees, both legs' bid/ask spread and estimated slippage from the gross funding spread. The 7-day average is historical gross funding for the same pair: a current rate close to it suggests the spread has persisted, one far above it is usually a spike that will decay.
Coverage note: BackPack and Extended share 27 markets, 2 of them with real depth — below the 10 markets / 5 liquid this page treats as full coverage, so this is a thin sample rather than a picture of the pair.
BackPack vs Extended — FAQ
How many markets can you arbitrage between BackPack and Extended?
27 perpetual markets are quoted on both BackPack and Extended right now. 23 of them show a net spread of at least 5% APR after estimated fees, and 2 have at least $1M of 24h volume on the smaller leg.
What is the best BackPack / Extended funding spread right now?
ZEC: long Extended and short BackPack for about 41.4% net APR after estimated fees, counting only markets with at least $1M of 24h volume on the smaller leg. The median across all 27 shared markets is 22.5%, so the top of the list is not typical.
Which side pays on the BackPack / Extended pair?
It varies by market: BackPack is the long (funding-receiving) leg in 7 of the shared markets and Extended in the other 20. The direction is set per market by which venue currently prices funding lower.
Trading the BackPack / Extended spread
The trade is one position split across two venues: long the exchange paying the more negative funding, short the one paying the more positive, in the same size. What limits it is not the headline APR but the smaller leg's liquidity, the fees on both sides, and how long the spread survives — funding decays and flips, often within hours. Venue detail: BackPack funding rates · Extended funding rates; the full calculation is in the methodology.