Aster vs BackPack Funding Arbitrage
24 shared markets · net of estimated fees · updated every few minutesAster and BackPack both quote 24 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 Aster / short BackPack at 14.0% net APR — but the median across all shared markets is 22.1%, 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 16 markets go long on Aster and 8 on BackPack. 22 markets clear 5% net APR, 15 clear 10%.
How this pair behaves
Aster pays funding every 4h on 136 markets and every 8h on 95 markets; BackPack pays every 1h on 63 markets. The two clocks differ, so one leg settles while the other is still accruing: a position held for only a few hours can pay one side without ever collecting from the other. Aster quotes 242 perpetual markets in total and BackPack quotes 63; the 24 they share are what this page ranks. Across its own book Aster runs a median funding rate of 10.9% and BackPack 10.9%, so the edge here comes from individual markets rather than from a standing gap between the venues.
Spreads by market
top 24 of 24 by net APR| Market | Long | Short | Net APR | Gross | 7d avg | Thin leg vol |
|---|---|---|---|---|---|---|
| MON | BackPack | Aster | 142.4% | 146.8% | +12.4% | $30K |
| S | BackPack | Aster | 75.1% | 90.7% | +15.8% | $43K |
| XPL | Aster | BackPack | 68.2% | 73.1% | +22.5% | $21K |
| AERO | Aster | BackPack | 57.1% | 62.0% | +18.9% | $130K |
| PUMP | BackPack | Aster | 54.9% | 57.9% | +36.4% | $223K |
| BERA | BackPack | Aster | 54.1% | 58.2% | -0.7% | $15K |
| XMR | Aster | BackPack | 50.5% | 54.7% | +13.9% | $191K |
| ENA | Aster | BackPack | 36.9% | 39.7% | -8.4% | $103K |
| PENGU | BackPack | Aster | 33.9% | 37.9% | -7.6% | $120K |
| FARTCOIN | Aster | BackPack | 28.4% | 33.4% | +11.5% | $34K |
| VVV | Aster | BackPack | 22.5% | 27.2% | +18.6% | $54K |
| WLFI | BackPack | Aster | 22.3% | 25.6% | +8.2% | $61K |
| W | Aster | BackPack | 22.0% | 26.9% | -66.1% | $26K |
| ZEC | Aster | BackPack | 14.0% | 16.4% | +25.1% | $2.1M |
| HYPE | Aster | BackPack | 13.6% | 15.9% | +9.3% | $2.4M |
| VIRTUAL | Aster | BackPack | 9.5% | 13.1% | +4.7% | $32K |
| KAITO | Aster | BackPack | 9.1% | 12.3% | -0.0% | $11K |
| PENDLE | Aster | BackPack | 8.7% | 12.3% | +8.6% | $93K |
| BNB | Aster | BackPack | 8.7% | 10.9% | +17.1% | $346K |
| SOL | Aster | BackPack | 6.7% | 9.5% | +2.9% | $15.5M |
| CRV | BackPack | Aster | 6.4% | 11.9% | +18.0% | $106K |
| JUP | BackPack | Aster | 6.2% | 9.0% | -15.1% | $190K |
| BTC | Aster | BackPack | 4.5% | 6.5% | +4.2% | $187.3M |
| ETH | Aster | BackPack | 2.2% | 4.2% | +2.2% | $38.0M |
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.
Aster vs BackPack — FAQ
How many markets can you arbitrage between Aster and BackPack?
24 perpetual markets are quoted on both Aster and BackPack right now. 22 of them show a net spread of at least 5% APR after estimated fees, and 5 have at least $1M of 24h volume on the smaller leg.
What is the best Aster / BackPack funding spread right now?
ZEC: long Aster and short BackPack for about 14.0% net APR after estimated fees, counting only markets with at least $1M of 24h volume on the smaller leg. The median across all 24 shared markets is 22.1%, so the top of the list is not typical.
Which side pays on the Aster / BackPack pair?
It varies by market: Aster is the long (funding-receiving) leg in 16 of the shared markets and BackPack in the other 8. The direction is set per market by which venue currently prices funding lower.
Trading the Aster / BackPack 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: Aster funding rates · BackPack funding rates; the full calculation is in the methodology.