Contract Specifications
Each perpetual market on GX Exchange has precisely defined tick sizes, lot sizes, leverage limits, and funding parameters. All values are enforced at the consensus layer.
Major Markets
| Parameter | BTC-USD | ETH-USD | SOL-USD |
|---|---|---|---|
| Tick size | $0.10 | $0.01 | $0.001 |
| Lot size | 0.001 BTC | 0.01 ETH | 0.1 SOL |
| Max leverage (small) | 40x | 25x | 20x |
| Max leverage (large) | 20x | 15x | 10x |
| Tier boundary | $150M | $100M | $70M |
| Initial margin (small) | 2.50% | 4.00% | 5.00% |
| Initial margin (large) | 5.00% | 6.67% | 10.00% |
| Maintenance margin (small) | 1.25% | 2.00% | 2.50% |
| Maintenance margin (large) | 2.50% | 3.33% | 5.00% |
| Funding interval | 8 hours | 8 hours | 8 hours |
| Funding settlement | Hourly | Hourly | Hourly |
| Max funding rate (per 8h) | 0.10% | 0.10% | 0.10% |
Default Market Specifications
Markets without custom tier configurations use:
| Parameter | Value |
|---|---|
| Max leverage (small) | 10x |
| Max leverage (large) | 5x |
| Tier boundary | $20M notional |
| Initial margin (small) | 10.00% |
| Initial margin (large) | 20.00% |
| Maintenance margin (small) | 5.00% |
| Maintenance margin (large) | 10.00% |
| Funding interval | 8 hours |
| Max funding rate (per 8h) | 0.10% |
Tick Size Rules
Tick sizes determine the minimum price increment for orders:
- Orders must be submitted at prices that are exact multiples of the tick size
- Tick sizes are set per market based on the typical price level of the underlying asset
- Smaller tick sizes provide finer granularity for high-precision markets
Lot Size Rules
Lot sizes determine the minimum order quantity increment:
- All order sizes must be exact multiples of the lot size
- Reduce-only orders may have a final execution smaller than the lot size to close a position exactly
- Positions smaller than 1 lot with notional value under $1 are eligible for dust conversion
Funding Parameters
All perpetual markets share a common funding model:
- Interest rate: 0.01% per 8-hour interval (11.6% annualized)
- Settlement frequency: Every hour (1/8 of the 8-hour rate per settlement)
- Premium sampling: Every 5 seconds, averaged over the settlement interval
- Premium clamp range: -0.05% to +0.05%
- Maximum funding rate: 4% per hour
- Impact notional: $20,000 for BTC/ETH, $6,000 for other markets
See Funding for the complete formula and mechanics.
Position Limits
Maximum position sizes are governed by margin tiers rather than hard caps. As position notional increases, leverage decreases, requiring progressively more margin. This natural mechanism limits position size to what the trader can collateralize.
See Margin Tiers for the complete per-asset tier tables.