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Ostium
DEXOpen Interest
$16.28mKey Metrics
Volume (30d)$137.36m
7d$33.7m
24h$2.29m
All-time$6.221b
Turnover (30d)8.4x
Markets66
Reference Assets66
Asset Groups10
Share of DEX OI0.3%
Est. Fees (30d)$68,681
24h$1,144
All-time$3.11m
Est. Annual$835,621
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 | -0.09% | $44,155 | $4.18m | $11.26m | EUR-USDC | $1.12 | -0.09% | 0% | 0% | 1h | 200x | $22.08 | $5,628 |
| ostium:xau-usdGold | Commodity Perp | Permissionless | $2.55m | +4.42% | $209,810 | $1.44m | $6.06m | XAU-USD | $4,165 | -0.18% | 0% | 0% | 1h | 50x | $104.91 | $3,029 |
| ostium:usd-jpyJapanese Yen | Forex Perps | Permissionless | $1.65m | -0.00% | $10.80 | $2.6m | $12.83m | JPY-USDC | $157.99 | -0.00% | 0% | 0% | 1h | 100x | $0.0054 | $6,415 |
| ostium:hg-usdCopper | Commodity Perp | Permissionless | $1.11m | -0.95% | $13,968 | $33,116 | $692,201 | HG-USD | $6.54 | -0.95% | 0% | 0% | 1h | 50x | $6.98 | $346.10 |
| ostium:brent-usdCrude Oil (Brent) | Commodity Perp | Permissionless | $1.06m | +3.41% | $231.60 | $236,737 | $864,812 | BRENT-USD | $108.42 | +3.41% | 0% | 0% | 1h | 15x | $0.12 | $432.41 |
| ostium:gbp-usdBritish Pound | Forex Perps | Permissionless | $1.03m | -0.06% | $10.80 | $75.58 | $1.03m | GBP-USDC | $1.33 | -0.06% | 0% | 0% | 1h | 200x | $0.0054 | $516.62 |
| ostium:spx-usdS&P 500 Index | Equity Perp | Permissionless | $872,229 | +10.65% | $459,213 | $2.81m | $22.17m | SPX-USD | $7,661 | -1.24% | 0% | 0% | 1h | 100x | $229.61 | $11,085 |
| ostium:nvda-usdNVIDIA Corporation | Stock Perp | Permissionless | $854,710 | -6.60% | $2,984 | $19,348 | $445,580 | NVDA-USD | $214.33 | -6.60% | 0% | 0% | 1h | 100x | $1.49 | $222.79 |
| ostium:tlt-usdiShares 20+ Year Treasury Bond ETF | Bond Perp | Permissionless | $319,855 | +2.64% | $10.80 | $6,048 | $3.22m | TLT-USDC | $80 | +2.64% | 0% | 0% | 1h | 75x | $0.0054 | $1,610 |
| ostium:xag-usdSilver | Commodity Perp | Permissionless | $316,902 | -2.01% | $1,615 | $32,297 | $1.1m | XAG-USD | $56.98 | -1.31% | 0% | 0% | 1h | 25x | $0.81 | $550.96 |
| ostium:mu-usdMicron Technology, Inc. | Stock Perp | Permissionless | $298,780 | -14.06% | $1,799 | $13,670 | $563,672 | MU-USDC | $880.26 | -14.53% | 0% | 0% | 1h | 50x | $0.90 | $281.84 |
| ostium:hyg-usdiShares iBoxx $ High Yield Corporate Bond ETF | Bond Perp | Permissionless | $293,795 | -0.45% | $0 | $21.59 | $8,220 | HYG-USDC | $76.90 | -0.45% | 0% | 0% | 1h | 100x | $0 | $4.11 |
| ostium:bb-usdBlackBerry Limited | Stock Perp | Permissionless | $258,265 | -9.55% | $0 | $32.39 | $30,326 | BB-USD | $8.06 | -9.55% | 0% | 0% | 1h | 50x | $0 | $15.16 |
| ostium:ndx-usdNasdaq-100 Index | Equity Perp | Permissionless | $157,627 | +447% | $1.41m | $20.19m | $63.16m | NDX-USD | $29,204 | -2.33% | 0% | 0% | 1h | 75x | $705.78 | $31,579 |
| ostium:glxy-usdGalaxy Digital Inc. | Stock Perp | Permissionless | $152,470 | -20.69% | $10.80 | $218.60 | $3,722 | GLXY-USD | $16.14 | -20.69% | 0% | 0% | 1h | 30x | $0.0054 | $1.86 |
| ostium:usd-cadCanadian Dollar | Forex Perps | Permissionless | $107,706 | -0.15% | $14,735 | $198,944 | $2.06m | CAD-USDC | $1.41 | -0.15% | 0% | 0% | 1h | 200x | $7.37 | $1,029 |
| ostium:amzn-usdAmazon.com, Inc. | Stock Perp | Permissionless | $106,772 | -4.71% | $73,939 | $434,374 | $677,729 | AMZN-USD | $250.14 | -4.71% | 0% | 0% | 1h | 100x | $36.97 | $338.87 |
| ostium:goog-usdAlphabet Inc. | Stock Perp | Permissionless | $100,385 | -3.08% | $10.80 | $84,804 | $150,843 | GOOG-USD | $337.28 | -3.08% | 0% | 0% | 1h | 100x | $0.0054 | $75.42 |
| ostium:aud-usdAustralian Dollar | Forex Perps | Permissionless | $99,342 | -0.17% | $10.80 | $4,765 | $316,125 | AUD-USDC | $0.69 | -0.17% | 0% | 0% | 1h | 100x | $0.0054 | $158.06 |
| ostium:cl-usdCrude Oil (WTI) | Commodity Perp | Permissionless | $97,349 | +3.98% | $1,256 | $89,625 | $527,654 | WTI-USD | $98.97 | +2.87% | 0% | 0% | 1h | 15x | $0.63 | $263.83 |
| ostium:mstr-usdStrategy Inc | Stock Perp | Permissionless | $82,015 | -11.58% | $10.80 | $55,128 | $156,110 | MSTR-USD | $136.49 | -11.58% | 0% | 0% | 1h | 50x | $0.0054 | $78.05 |
| ostium:crcl-usdCircle Internet Group, Inc. | Stock Perp | Permissionless | $58,211 | -2.83% | $10.80 | $82,765 | $131,052 | CRCL-USD | $82.26 | -2.83% | 0% | 0% | 1h | 30x | $0.0054 | $65.53 |
| ostium:ura-usdGlobal X Uranium ETF | Commodity Perp | Permissionless | $44,381 | -8.94% | $10.80 | $2,709 | $2,893 | URA-USDC | $35.43 | -8.94% | 0% | 0% | 1h | 15x | $0.0054 | $1.45 |
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