Specification Index
Overview
This page consolidates the contract, margin, and pricing specifications for OBSDN's equity perpetual markets. Fee rates, current market state, and the live open-interest cap for each market are exposed through the markets endpoint.
All markets are quoted and settled in USDC.
Markets
| Market | Company | Listing |
|---|---|---|
| SKHYNIX-PERP | SK hynix Inc. | KRX 000660 |
| SAMSUNG-PERP | Samsung Electronics Co., Ltd. | KRX 005930 |
| KIOXIA-PERP | Kioxia Holdings Corporation | TSE 285A |
| SEMCO-PERP | Samsung Electro-Mechanics Co., Ltd. | KRX 009150 |
| HANMISEMI-PERP | Hanmi Semiconductor Co., Ltd. | KRX 042700 |
Contract Specifications
| Market | Max Leverage | OI Cap |
|---|---|---|
| SKHYNIX-PERP | 10x | $16,000 |
| SAMSUNG-PERP | 10x | $16,000 |
| KIOXIA-PERP | 10x | $76,480 |
| SEMCO-PERP | 10x | $40,000 |
| HANMISEMI-PERP | 10x | $40,000 |
Max leverage is the highest leverage permitted when opening a position. The OI cap column lists the target open-interest cap for each market, denominated in USDC notional. Markets are uncapped by default; the live cap is configured at runtime and exposed through the markets endpoint. See Open Interest for how caps are enforced.
Pricing and Sessions
| Market | External Coverage | Trading Hours |
|---|---|---|
| SKHYNIX-PERP | Continuous | 24/7 |
| SAMSUNG-PERP | Continuous | 24/7 |
| KIOXIA-PERP | Japan session | Mon–Fri 00:00–09:00 GMT (09:00–18:00 JST) |
| SEMCO-PERP | Korea session | Mon–Fri 00:00–09:00 GMT (09:00–18:00 KST) |
| HANMISEMI-PERP | Korea session | Mon–Fri 00:00–09:00 GMT (09:00–18:00 KST) |
During external coverage the index price is sourced from a signed external feed (Active Session). Outside it, the index price is produced by OBSDN's orderbook-derived EWMA (Off-Hours). SKHYNIX-PERP and SAMSUNG-PERP track a continuous external feed and trade around the clock. KIOXIA-PERP, SEMCO-PERP, and HANMISEMI-PERP follow their home-exchange sessions, and their markets halt trading on the respective exchange holidays. See Trading Sessions for the full coverage windows.
Margin and Collateral
All markets support both cross and isolated margin. USDC collateral is applied at a 1.0 ratio with no haircut. See Margin System and Risk Parameters.
Open Interest
Open interest is measured double-sided: it is the sum of the absolute size of every open position. A 1 BTC long matched by a 1 BTC short contributes 2 BTC to OI.
Open-interest caps are configured per market and are runtime-adjustable. A market is uncapped by default; when a cap is set, risk-increasing orders are rejected once open interest would exceed it, while reduce-only and post-only orders are exempt. Current caps are exposed through the markets endpoint.