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Ostium targets this week to restart Arbitrum-based RWA trading platform

Ostium targets this week to restart Arbitrum-based RWA trading platform

The exchange plans a gradual trading resumption on July 23, keeping positions and orders in place, repricing them at market levels and prioritizing settlement and loss-avoidance actions before new trading.

USDC
ARB

Fact Check
Every element of the claim is corroborated. The PANews primary article (sourced to Ostium's official X post) confirms the relaunch-this-week plan and ≥24-hour notice, plus final security checks. Cryptopolitan and Phemex independently confirm the same relaunch and 24h-notice details. The $23.75 million ($23,752,746 USDC) exploit tied to compromised oracle-signer/PriceUpKeep credentials is confirmed by both Cryptopolitan and the authoritative Galaxy Research analysis. Ostium operates on Arbitrum. The only minor imprecision is the claim's 'RWA trading platform' framing — Ostium is typically described as a synthetic/perpetuals trading platform that offers RWA-style exposure — but this does not undermine the substantive claim.
Summary

Ostium said trading on its Arbitrum-based platform will gradually resume on July 23 after an exploit that earlier reports described as draining about $18 million in USDC, though the company had later quantified the loss at 23,752,746 USDC. Existing positions and pending orders will be preserved and re-marked to live market prices when trading restarts. The protocol said settlement and loss-avoidance actions will be enabled before new trading, while compensation for affected liquidity providers remains under review. Ostium and outside researchers had previously said the incident involved compromised off-chain pricing and execution credentials rather than a direct breach of core smart contract code, allowing the attacker to submit a correctly signed but fabricated price and profit against the liquidity pool. The company has said it is preparing a recovery plan and a technical post-mortem.

Terms & Concepts
  • Arbitrum: A blockchain network used by decentralized applications to process transactions separately from Ethereum's main chain.
  • liquidity providers: Users who deposit assets into a trading pool so the platform can facilitate trades and settle profits and losses.
  • re-marked to live market prices: A process of updating open positions and orders to current market levels when trading resumes.