Arcus vs Aster Funding Arbitrage
33 shared markets · net of estimated fees · updated every few minutesArcus and Aster both quote 33 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 Arcus at 14.3% net APR — but the median across all shared markets is 2.1%, 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 4 markets go long on Arcus and 29 on Aster. 10 markets clear 5% net APR, 7 clear 10%.
How this pair behaves
Arcus pays funding every 1h on 60 markets; Aster pays every 4h on 136 markets and every 8h on 95 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. Arcus quotes 60 perpetual markets in total and Aster quotes 242; the 33 they share are what this page ranks. Across its own book Arcus runs a median funding rate of 4.4% and Aster 10.9%, so the edge here comes from individual markets rather than from a standing gap between the venues.
Spreads by market
top 25 of 33 by net APR| Market | Long | Short | Net APR | Gross | 7d avg | Thin leg vol |
|---|---|---|---|---|---|---|
| CASHCAT | Arcus | Aster | 95.1% | 101.4% | -19.1% | $438K |
| SKHY | Aster | Arcus | 59.1% | 61.7% | +13.6% | $520K |
| W | Aster | Arcus | 21.9% | 26.9% | +12.8% | $26K |
| PONS | Arcus | Aster | 21.6% | 25.2% | +6.2% | $248K |
| ZEC | Aster | Arcus | 14.3% | 16.4% | +1.8% | $7.2M |
| HYPE | Aster | Arcus | 13.7% | 15.9% | +1.8% | $6.7M |
| USELESS | Aster | Arcus | 13.3% | 17.8% | +4.5% | $262K |
| BNB | Aster | Arcus | 8.5% | 10.9% | +8.8% | $252K |
| XRP | Arcus | Aster | 5.8% | 8.2% | -3.3% | $2.4M |
| SOL | Aster | Arcus | 5.3% | 7.5% | +3.3% | $11.3M |
| BTC | Aster | Arcus | 4.5% | 6.5% | +1.8% | $74.6M |
| META | Aster | Arcus | 2.3% | 4.4% | +18.0% | $656K |
| QQQ | Aster | Arcus | 2.3% | 4.4% | +0.6% | $1.4M |
| ETH | Aster | Arcus | 2.3% | 4.2% | +2.3% | $22.7M |
| GOOGL | Aster | Arcus | 2.3% | 4.4% | +15.1% | $417K |
| MU | Aster | Arcus | 2.1% | 4.4% | +7.1% | $3.7M |
| TSLA | Aster | Arcus | 2.1% | 4.4% | +2.2% | $2.1M |
| NVDA | Aster | Arcus | 2.1% | 4.4% | +4.3% | $752K |
| SPY | Aster | Arcus | 2.1% | 4.4% | +3.5% | $473K |
| SPCX | Aster | Arcus | 2.1% | 4.4% | +7.2% | $7.7M |
| SNDK | Aster | Arcus | 1.9% | 4.4% | +1.7% | $2.0M |
| AAPL | Aster | Arcus | 1.9% | 4.4% | -1.3% | $480K |
| CRCL | Aster | Arcus | 1.9% | 4.4% | +8.5% | $2.2M |
| MSTR | Aster | Arcus | 1.9% | 4.4% | +8.4% | $2.1M |
| MRVL | Aster | Arcus | 1.9% | 4.4% | +19.1% | $941K |
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.
Arcus vs Aster — FAQ
How many markets can you arbitrage between Arcus and Aster?
33 perpetual markets are quoted on both Arcus and Aster right now. 10 of them show a net spread of at least 5% APR after estimated fees, and 14 have at least $1M of 24h volume on the smaller leg.
What is the best Arcus / Aster funding spread right now?
ZEC: long Aster and short Arcus for about 14.3% net APR after estimated fees, counting only markets with at least $1M of 24h volume on the smaller leg. The median across all 33 shared markets is 2.1%, so the top of the list is not typical.
Which side pays on the Arcus / Aster pair?
It varies by market: Arcus is the long (funding-receiving) leg in 4 of the shared markets and Aster in the other 29. The direction is set per market by which venue currently prices funding lower.
Trading the Arcus / Aster 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: Arcus funding rates · Aster funding rates; the full calculation is in the methodology.