Ostium
HaltedExploitedAuditedRWAHALTED since 2026-07-15 after an $18M oracle exploit — withdrawals and trading are frozen with no restart date. Ostium is a perpetual-futures DEX on Arbitrum offering up to 200x leverage on 71 pairs across stocks, ETFs, commodities, indices, forex, and crypto, settled onchain in USDC and hedged offchain through institutional partners.
Active Risk Alerts
Live signals detected by Sentinel monitors across all five risk classes.
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Score history
This rating is re-checked every month. A point is recorded for every check, so a flat line means we looked and nothing moved. Hover anywhere on the chart to see what moved that month, and by how much.
The Problem
Traders lose self-custody and pay middlemen to access global stock, FX, and commodity markets, while existing onchain perp DEXes focus almost entirely on crypto pairs.
The Solution
Ostium settles perpetuals onchain in USDC while hedging directional flow through institutional partners, giving traders self-custody plus deep TradFi liquidity across 71 pairs.
Why it Matters
Dedicated RWA-perp coverage (stocks, ETFs, commodities, FX, indices) at up to 200x leverage with offchain institutional hedging — 66% of volume is non-crypto.
Protocol Metrics
Related Research
View allFrequently asked questions about Ostium
What is Ostium?+
Ostium is a DEX protocol operating on Arbitrum. HALTED since 2026-07-15 after an $18M oracle exploit — withdrawals and trading are frozen with no restart date. Ostium is a perpetual-futures DEX on Arbitrum offering up to 200x leverage on 71 pairs across stocks, ETFs, commodities, indices, forex, and crypto, settled onchain in USDC and hedged offchain through institutional partners.
How does Ostium work?+
Ostium settles perpetuals onchain in USDC while hedging directional flow through institutional partners, giving traders self-custody plus deep TradFi liquidity across 71 pairs.
Is Ostium safe?+
DeFi Sentinel rates Ostium C with a safety score of 53/100, indicating rated risk. The score reflects five risk dimensions: smart contract & technical risk, economic design & market risk, governance & centralization, sustainability & competitive position, and reputation & social trust. Ostium has 6 audits on record. DeFi Sentinel's analysis flagged 7 high, 4 medium, 1 low risk alerts across Smart Contract & Technical Risk, Economic Design & Market Risk, Governance & Centralization, Sustainability & Competitive Position and Reputation & Social Trust. As with all DeFi protocols, residual risk remains and users should review the full risk breakdown before depositing.
What is the safety score of Ostium?+
Ostium has a DeFi Sentinel safety score of 53/100 (rating C), last updated October 13, 2026. The score is computed across smart contract & technical risk (30%), economic design & market risk (25%), governance & centralization (20%), sustainability & competitive position (15%), and reputation & social trust (10%).
Which chains does Ostium support?+
Ostium is deployed on Arbitrum.
Has Ostium been audited?+
Yes. Ostium has 6 audit reports on record from firms including Zellic, Three Sigma, Pashov Audit Group. Audit reports and dates are linked under the Resources tab on this page.