Skip to main content

Documentation Index

Fetch the complete documentation index at: https://docs.ostium.com/llms.txt

Use this file to discover all available pages before exploring further.

​
Overview

Ostium offers 71 perpetual instruments across 6 asset classes: Stocks, ETFs, Commodities, Indices, Forex, and Crypto. Leverage ranges from 50x to 200x depending on the pair, opening fees range from 3 to 5 bps, and all pairs execute on Bid/Ask pricing. Crypto trades 24/7; traditional assets follow their native market hours.

​
Stocks

33 US-listed equities with leverage up to 100x and 3 bps opening fees. All use Bid/Ask execution. Rollover fees apply (SOFR-based). Market hours: Monday–Friday, 9:30 AM – 4:00 PM ET. Day trades auto-close at 3:45 PM ET. Outside hours, limit and stop orders queue; market orders are rejected.
PairMax LeverageOpening Fee
AAPL/USD100x3 bps
AMD/USD100x3 bps
AMZN/USD100x3 bps
ARM/USD100x3 bps
ASML/USD100x3 bps
AVGO/USD100x3 bps
BMNR/USD100x3 bps
CAT/USD100x3 bps
COIN/USD100x3 bps
COST/USD100x3 bps
CRCL/USD100x3 bps
CVX/USD100x3 bps
GEV/USD100x3 bps
GLXY/USD100x3 bps
GOOG/USD100x3 bps
HOOD/USD100x3 bps
INTC/USD100x3 bps
META/USD100x3 bps
MSFT/USD100x3 bps
MSTR/USD100x3 bps
MU/USD100x3 bps
NFLX/USD100x3 bps
NVDA/USD100x3 bps
ORCL/USD100x3 bps
PLTR/USD100x3 bps
RIVN/USD100x3 bps
SBET/USD100x3 bps
SHEL/USD100x3 bps
SMCI/USD100x3 bps
SNDK/USD100x3 bps
TSLA/USD100x3 bps
TSM/USD100x3 bps
XOM/USD100x3 bps

​
ETFs

6 ETFs with leverage up to 50x and 5 bps opening fees. Rollover fees apply (SOFR-based). Market hours follow the underlying exchange: HYG, TLT, UNG, URA, and XLE trade US equity hours (9:30 AM – 4:00 PM ET); KR2550 follows the Korean Stock Exchange schedule.
PairMax LeverageOpening Fee
HYG/USD50x5 bps
KR2550/USD50x5 bps
TLT/USD50x5 bps
UNG/USD50x5 bps
URA/USD50x5 bps
XLE/USD50x5 bps

​
Commodities

7 physical and energy commodities with leverage up to 200x and opening fees of 3 to 5 bps (gold 3 bps, all others 5 bps). Rollover fees apply (derived from futures term structure). Market hours generally follow CME/NYMEX futures: Sunday 6:00 PM ET – Friday 5:00 PM ET, with a daily settlement break.
PairMax LeverageOpening Fee
XAU/USD (Gold)200x3 bps
WTI/USD (Crude Oil)100x5 bps
BRENT/USD100x5 bps
XCU/USD (Copper Spot)50x5 bps
XAG/USD (Silver)100x5 bps
XPT/USD (Platinum)50x5 bps
XPD/USD (Palladium)50x5 bps

​
Indices

7 major global indices with leverage up to 200x (US) or 100x (European and Asian) and 3 bps opening fees. Rollover fees apply (SOFR-based). US indices (US500, US100, US30) follow extended futures hours: Sunday 6:00 PM ET – Friday 5:00 PM ET. European and Asian indices follow their respective local exchange hours.
PairMax LeverageOpening Fee
US500/USD (US 500)200x3 bps
US100/USD (US Tech 100)200x3 bps
US30/USD (US Wall Street 30)200x3 bps
GER40/EUR (Germany 40)100x3 bps
UK100/GBP (UK 100)100x3 bps
JP225/JPY (Japan 225)100x3 bps
HK50/HKD (Hong Kong 50)100x3 bps

​
Forex

9 major and emerging currency pairs with leverage up to 200x (150x for USD/MXN and USD/KRW) and 3–5 bps opening fees. Rollover fees apply (derived from futures term structure). Market hours: Sunday 5:00 PM ET – Friday 5:00 PM ET (continuous 24/5).
PairMax LeverageOpening Fee
AUD/USD200x3 bps
EUR/USD200x3 bps
GBP/USD200x3 bps
NZD/USD200x3 bps
USD/CAD200x3 bps
USD/CHF200x3 bps
USD/JPY200x3 bps
USD/MXN150x5 bps
USD/KRW150x5 bps

​
Crypto

9 major cryptocurrencies with leverage up to 200x and 5 bps opening fees. Rollover fees accrue continuously per block, same as all other asset classes. Market hours: 24/7, 365 days.
PairMax LeverageOpening Fee
BTC/USD200x5 bps
ETH/USD200x5 bps
SOL/USD150x5 bps
XRP/USD100x5 bps
BNB/USD100x5 bps
ADA/USD100x5 bps
LINK/USD100x5 bps
TRX/USD100x5 bps
HYPE/USD100x5 bps

​
Execution Model

All pairs use Bid/Ask execution: longs open at the ask price and close at the bid; shorts open at the bid and close at the ask. The spread between bid and ask reflects underlying market liquidity. Dynamic spreads are enabled for all crypto and stock pairs. On these pairs, trades execute at a Price-After-Impact that applies zero spread under balanced order flow and wider spreads when flow becomes one-sided. All other pairs (ETFs, commodities, indices, forex) use standard bid/ask execution.

​
Holding Costs

All pairs incur rollover fees that accrue continuously per block. See Fees for formulas and worked examples.
Asset ClassHolding CostBasis
StocksRollover feeSOFR + carry premium
ETFsRollover feeSOFR + carry premium
CommoditiesRollover feeFutures term structure + carry premium
IndicesRollover feeSOFR + carry premium
ForexRollover feeFutures term structure + carry premium
CryptoRollover feeFunding rates + futures term structure + carry premium

​
FAQ

No. Stocks trade Monday–Friday, 9:30 AM – 4:00 PM ET. Day trades (intraday positions with leverage above the overnight cap) auto-close at 3:45 PM ET. You can place limit and stop orders outside market hours; they queue and execute at market open. Crypto is 24/7; forex is 24/5.
Limit and stop orders queue until the market reopens and execute at the first available price. Market orders are rejected during closed hours. Note that prices can gap between close and open, so queued orders may fill at a different level than when placed.
Ostium regularly expands its market offerings. New pairs are announced in official channels and added to this page.
  • Fees — Opening fees, holding costs, oracle fees, and liquidation.
  • Opening a Trade — Step-by-step from collateral to order confirmation.
  • Stocks: Day Trading — Intraday leverage rules and auto-close timing.