Overview
This section provides detailed specifications for each ETF perpetual available on Rubicon.
Overview
All Rubicon perpetuals share common characteristics:
Contract Type
Linear perpetual
Settlement
Cash (USDH)
Max Leverage
3x
Funding Interval
8 hours
Oracle Update
Every 3 seconds
Available Markets
US ETFs
Korean ETFs
Contract Specifications
Position Sizing
Contract size
1 ETF share equivalent
Tick size
$0.01
Minimum order
0.1 contracts
Maximum position
Varies by market
Margin Requirements
Initial margin
33.3% (at 3x)
Maintenance margin
5%
Liquidation buffer
Variable
Price Sources
We use direct ETF price feeds, not synthetic basket construction:
This ensures our prices match the actual tradeable ETF.
Source Priority
Yahoo Finance — Primary source for all ETFs
Polygon REST API — Backup source for US equities (SOXX)
Stale Cache — 60-second fallback
See Oracle Infrastructure for technical details.
Trading Hours Summary
US (SOXX)
9:30 AM - 4:00 PM
4:00 AM - 8:00 PM
Korea (.KS)
7:00 PM - 1:30 AM
None
During market closure, oracle prices freeze and trading continues with stale prices.
Risk Parameters
Each market has risk parameters to protect traders and the system:
Max leverage
Limits position risk
Open interest cap
Limits total exposure
Price bands
Prevents manipulation
Funding cap
Limits funding rate extremes
Adding New Markets
We evaluate new ETFs based on:
Data availability — Reliable price feeds
Trader demand — Community requests
Liquidity — Underlying ETF trading volume
Regulatory clarity — Jurisdiction considerations
Request new markets in our Discord.
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