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Ostium
DEXOpen Interest
$16mKey Metrics
Volume (30d)$138.18m
7d$32.29m
24h$2.6m
All-time$6.218b
Turnover (30d)8.6x
Markets66
Reference Assets66
Asset Groups10
Share of DEX OI0.3%
Est. Fees (30d)$69,090
24h$1,302
All-time$3.11m
Est. Annual$840,589
Taker Fee4 bps
Markets
| Market | Open Interest | Volume | Price | Funding | Est. Fees | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Name | Asset Type | Access Model | Pair | Interval | ||||||||||||
| ostium:eur-usdEuro | Forex Perps | Permissionless | $4.42m | +0.35% | $74,425 | $4.11m | $11.25m | EUR-USDC | $1.12 | +0.35% | 0% | 0% | 1h | 200x | $37.21 | $5,626 |
| ostium:xau-usdGold | Commodity Perp | Permissionless | $2.44m | -1.80% | $241,150 | $1.35m | $5.89m | XAU-USD | $4,174 | +0.44% | 0% | 0% | 1h | 50x | $120.58 | $2,944 |
| ostium:usd-jpyJapanese Yen | Forex Perps | Permissionless | $1.65m | +0.10% | $1,063 | $3.06m | $14.84m | JPY-USDC | $157.95 | +0.10% | 0% | 0% | 1h | 100x | $0.53 | $7,422 |
| ostium:hg-usdCopper | Commodity Perp | Permissionless | $1.12m | +0.90% | $109.55 | $5,301 | $667,502 | HG-USD | $6.60 | +0.92% | 0% | 0% | 1h | 50x | $0.055 | $333.75 |
| ostium:gbp-usdBritish Pound | Forex Perps | Permissionless | $1.03m | +0.72% | $10.80 | $75.58 | $1.04m | GBP-USDC | $1.33 | +0.72% | 0% | 0% | 1h | 200x | $0.0054 | $521.67 |
| ostium:brent-usdCrude Oil (Brent) | Commodity Perp | Permissionless | $1.03m | +0.78% | $673.20 | $292,386 | $950,534 | BRENT-USD | $104.79 | +0.78% | 0% | 0% | 1h | 15x | $0.34 | $475.27 |
| ostium:nvda-usdNVIDIA Corporation | Stock Perp | Permissionless | $863,449 | +0.46% | $11,353 | $24,895 | $511,690 | NVDA-USD | $216.52 | +0.46% | 0% | 0% | 1h | 100x | $5.68 | $255.85 |
| ostium:spx-usdS&P 500 Index | Equity Perp | Permissionless | $787,646 | -16.10% | $558,708 | $2.36m | $22m | SPX-USD | $7,750 | +0.69% | 0% | 0% | 1h | 100x | $279.35 | $11,002 |
| ostium:xag-usdSilver | Commodity Perp | Permissionless | $322,610 | +1.54% | $14,218 | $99,051 | $1.15m | XAG-USD | $57.59 | +1.54% | 0% | 0% | 1h | 25x | $7.11 | $575.82 |
| ostium:tlt-usdiShares 20+ Year Treasury Bond ETF | Bond Perp | Permissionless | $319,175 | -0.60% | $10.80 | $7,286 | $3.55m | TLT-USDC | $79.83 | -0.60% | 0% | 0% | 1h | 75x | $0.0054 | $1,774 |
| ostium:mu-usdMicron Technology, Inc. | Stock Perp | Permissionless | $305,546 | +3.34% | $10.80 | $10,593 | $563,956 | MU-USDC | $905.13 | +3.34% | 0% | 0% | 1h | 50x | $0.0054 | $281.98 |
| ostium:hyg-usdiShares iBoxx $ High Yield Corporate Bond ETF | Bond Perp | Permissionless | $294,483 | +0.19% | $10.80 | $43.19 | $8,241 | HYG-USDC | $77.08 | +0.19% | 0% | 0% | 1h | 100x | $0.0054 | $4.12 |
| ostium:bb-usdBlackBerry Limited | Stock Perp | Permissionless | $273,335 | +4.54% | $10.80 | $53.98 | $30,347 | BB-USD | $8.53 | +4.54% | 0% | 0% | 1h | 50x | $0.0054 | $15.17 |
| ostium:glxy-usdGalaxy Digital Inc. | Stock Perp | Permissionless | $167,779 | +5.56% | $10.80 | $218.60 | $3,722 | GLXY-USD | $17.76 | +5.56% | 0% | 0% | 1h | 30x | $0.0054 | $1.86 |
| ostium:amzn-usdAmazon.com, Inc. | Stock Perp | Permissionless | $108,044 | +1.13% | $90,499 | $382,626 | $620,361 | AMZN-USD | $253.12 | +1.13% | 0% | 0% | 1h | 100x | $45.25 | $310.18 |
| ostium:usd-cadCanadian Dollar | Forex Perps | Permissionless | $107,820 | -29.15% | $21,988 | $197,574 | $2.05m | CAD-USDC | $1.42 | -0.38% | 0% | 0% | 1h | 200x | $10.99 | $1,025 |
| ostium:goog-usdAlphabet Inc. | Stock Perp | Permissionless | $102,031 | -0.53% | $10.80 | $84,804 | $150,843 | GOOG-USD | $342.81 | -0.53% | 0% | 0% | 1h | 100x | $0.0054 | $75.42 |
| ostium:aud-usdAustralian Dollar | Forex Perps | Permissionless | $99,441 | +0.76% | $10.80 | $4,765 | $317,045 | AUD-USDC | $0.70 | +0.76% | 0% | 0% | 1h | 100x | $0.0054 | $158.52 |
| ostium:cl-usdCrude Oil (WTI) | Commodity Perp | Permissionless | $93,720 | +16.47% | $42,271 | $137,491 | $589,077 | WTI-USD | $96.30 | +1.81% | 0% | 0% | 1h | 15x | $21.14 | $294.54 |
| ostium:mstr-usdStrategy Inc | Stock Perp | Permissionless | $87,125 | +4.95% | $10.80 | $55,128 | $156,110 | MSTR-USD | $145 | +4.95% | 0% | 0% | 1h | 50x | $0.0054 | $78.05 |
| ostium:crcl-usdCircle Internet Group, Inc. | Stock Perp | Permissionless | $61,625 | +13.52% | $10,248 | $93,002 | $142,830 | CRCL-USD | $87.09 | +10.68% | 0% | 0% | 1h | 30x | $5.12 | $71.41 |
| ostium:ura-usdGlobal X Uranium ETF | Commodity Perp | Permissionless | $45,496 | +4.70% | $479.69 | $3,178 | $3,362 | URA-USDC | $36.32 | +4.65% | 0% | 0% | 1h | 15x | $0.24 | $1.68 |
| ostium:avgo-usdBroadcom Inc. | Stock Perp | Permissionless | $39,941 | -0.11% | $10.80 | $75.58 | $916,854 | AVGO-USD | $339.08 | -0.11% | 0% | 0% | 1h | 50x | $0.0054 | $458.43 |
About Ostium
Ostium is a self-custodial perpetual venue on Arbitrum founded in 2022 by Harvard classmates Kaledora Kiernan-Linn (CEO, ex-Bridgewater quant and former Royal Danish Ballet dancer) and Marco Antonio Ribeiro (CTO, former Olympiad medalist). It provides perpetual exposure to stocks, commodities, FX, and indices with up to 200× leverage, using a quote-based RFQ pricing model that draws from off-chain liquidity venues rather than recreating fragmented on-chain order books. Pricing is sourced via Stork Network with QUODD institutional data; all positions are margined and cash-settled in USDC. Over 95% of open interest is concentrated in non-crypto RWAs (gold, silver, oil, S&P 500, Nasdaq, EUR/USD, JPY/USD, Tesla, Apple, Coinbase). Ostium has raised $24M total, including a $20M Series A led by General Catalyst and Jump Crypto in December 2025.
Entity
Legal entityOstium Labs, Inc.
Primary chainArbitrum
Registry
Ostium Labs, Inc. was founded in 2022 by Harvard alumni Kaledora Kiernan-Linn (CEO) and Marco Antonio Ribeiro (CTO), both formerly quantitative researchers at Bridgewater Associates. The company has raised $24M total, including a $20M Series A in December 2025 led by General Catalyst and Jump Crypto at a ~$250M valuation, and uses Stork Network with QUODD institutional market data for off-chain price feeds.
Markets
Open Interest by asset group
Asset classes
Fees & revenue
Revenue modelOpening Fee
ConfidenceIssuer-Disclosed
Perp Taker Fee4 bps
Perp Funding Retention0%
Margin Settlement AssetsUSDC (Arbitrum)
Fees Last Verified2026-05-11
Ostium charges a single FLAT opening fee on RWA markets — same rate regardless of maker/taker direction. Stocks, indices, and FX: 4 bps flat opening. Commodities: variable 8-20 bps per symbol based on volatility. NO closing fee on any market. Non-crypto pairs have rollover fees (instead of crypto-style funding) that reflect underlying market financing costs. Crypto markets (not displayed on this RWA page) use a separate 3/10 bps maker/taker schedule. Source: https://ostium-labs.gitbook.io/ostium-docs/fee-breakdown