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Trading is live on Ostium as of 10:00 AM ET, reopening in stages.
At reopen, protective and reduce-only actions come first: closing positions, topping up collateral, updating or cancelling orders, and automated take-profits, stop-losses, and liquidations.
Opening new positions follows shortly after, once pending orders have cleared. A further update will confirm when full trading is live.
The system executes only on live prices. No position can be filled or liquidated at a price from before the pause.
More updates will come. Trust only official Ostium channels.
Trading on Ostium reopens Thursday, July 23 at 10:00am ET.
Below covers what happens to open positions, how trading comes back online, and a recovery plan update for liquidity providers.
What happens to positions at reopen
Open positions and pending orders will carry over as they are. Traders do not need to do anything in advance.
When trading resumes, positions will be marked to the live market price at that moment. Only the live market price when trading resumes matters, not the price movements during the pause. A position will be liquidated only if it is below its liquidation level at that reopening price. Any take-profit, stop-loss, or limit order whose level has been reached at time of live market prices at 10:00 AM ET on July 23, 2026 will execute then. Traders have 24 hours before reopen to prepare to manage their positions.
How reopening will roll out
To help bring the protocol back safely, we will enable actions in stages. At reopen, protective and reduce-only actions will come first: closing positions, topping up collateral, updating/cancelling orders, automated take-profits, stop-losses, and liquidations.
Opening new positions follows shortly after, once pending orders have cleared. We will update when full trading is live.
For liquidity providers
New OLP deposits are paused. This is designed to ensure existing LPs who remain continue to earn a share of protocol revenue on a smaller capital base. Withdrawals will process at the next settlement.
We will provide additional details regarding the recovery in a follow-on post, including the structure and allocation of the capital commitment.
For your safety
Please remain vigilant and know we are not circulating any recovery forms, and will never ask for your private keys, seed phrase, or funds. There are currently illegitimate accounts attempting to impersonate the company and official team accounts.
We will post when trading is live. Trust only official Ostium channels. Updates will be posted here, on our Telegram announcements channel, and on the app.
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Trading on Ostium reopens Thursday, July 23 at 10:00am ET.
Below covers what happens to open positions, how trading comes back online, and a recovery plan update for liquidity providers.
What happens to positions at reopen
Open positions and pending orders will carry over as they are. Traders do not need to do anything in advance.
When trading resumes, positions will be marked to the live market price at that moment. Only the live market price when trading resumes matters, not the price movements during the pause. A position will be liquidated only if it is below its liquidation level at that reopening price. Any take-profit, stop-loss, or limit order whose level has been reached at time of live market prices at 10:00 AM ET on July 23, 2026 will execute then. Traders have 24 hours before reopen to prepare to manage their positions.
How reopening will roll out
To help bring the protocol back safely, we will enable actions in stages. At reopen, protective and reduce-only actions will come first: closing positions, topping up collateral, updating/cancelling orders, automated take-profits, stop-losses, and liquidations.
Opening new positions follows shortly after, once pending orders have cleared. We will update when full trading is live.
For liquidity providers
New OLP deposits are paused. This is designed to ensure existing LPs who remain continue to earn a share of protocol revenue on a smaller capital base. Withdrawals will process at the next settlement.
We will provide additional details regarding the recovery in a follow-on post, including the structure and allocation of the capital commitment.
For your safety
Please remain vigilant and know we are not circulating any recovery forms, and will never ask for your private keys, seed phrase, or funds. There are currently illegitimate accounts attempting to impersonate the company and official team accounts.
We will post when trading is live. Trust only official Ostium channels. Updates will be posted here, on our Telegram announcements channel, and on the app.
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Update: We are working toward a relaunch this week. We will provide a notification 24 hours before trading resumes. Final checks are being done by our auditors, third-party cybersecurity experts, and engineering team.
What this means for positions when trading resumes:
• They are marked to the live market price at the time trading resumes.
• Traders will not be liquidated based on price movements that happened while trading was paused.
• If a trader’s position is below its liquidation threshold at the live market price when trading resumes, it will be liquidated.
• Pending orders will carry over exactly as they are.
For affected liquidity providers, our team is working hard on a recovery plan. Ostium Labs intends to contribute from its own balance sheet alongside new and existing partners. We know this is the update you are waiting for, and will share it as soon as we can.
Please trust only official Ostium channels. We will share all updates here on X and on our telegram announcements channel. We will never DM you first or ask for your keys, seed phrase, or funds.
More to come.
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An update on where things stand:
What happened
On July 15, Ostium’s LP (liquidity provider) vault was exploited for 23,752,746 USDC. Based on our ongoing investigation, the attacker compromised off-chain infrastructure related to the system that feeds prices into the protocol. The attacker then submitted illegitimate price reports that were manipulated to appear as valid, opening and instantly closing a series of large positions to extract an artificial profit from the vault. By design, trader collateral sits in a separate, isolated contract and is not affected, with all positions remaining open.
Our response
We are working with Mandiant, zeroShadow, Collisionless, and SEAL 911, alongside law enforcement, and coordinating with exchanges, bridges, and stablecoin issuers. Within 60 minutes of the first exploit transaction, we coordinated to pause trading and freeze all trading contracts. Currently, all of our engineering efforts are focused on isolating and hardening the infrastructure needed to enable a secure re-launch.
What is next
Impacted liquidity providers and the safe resumption of trading remain our top priority, and we are working around the clock towards the path forward. As a reminder, we will give at least 24 hours notice before trading contracts are unfrozen. Upon re-open, trader positions will be marked to the price at re-open, independent of interim price movements.
Please trust only official channels. We will never DM you first or ask for your keys, seed phrase, or funds.
If you have any leads, information, or resources to help with the investigation, reach us at: TIPS@ostium.io.
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A Security Update: Trading remains paused following the security incident. User positions remain open and unmodifiable, and trader margin remains unmoved in frozen trading smart contracts. The team will continue to provide updates as they become available regarding a timeline both to the resumption of smart contract activity and the recovery of funds.
Over the past 14 hours, the team has been in continuous coordination with relevant authorities, SEAL 911, and multiple security researchers. Several teams are working full-time to track the movement of funds and support the investigation. We are thankful for the support of countless individuals who have assisted throughout.
We remain focused on resolving this incident around the clock and will share further status updates as soon as we are able.
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Update: All trader funds and open positions are currently preserved as-is (frozen). Funds in the trading storage contract are paused. The team is actively investigating with relevant security experts. We will provide updates as they come.
We are aware of the issue with the OLP vault. We have paused all trading. The team is investigating.
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This morning, between 14:18–14:23 UTC, Ostium experienced a security issue leading to a loss of funds from the public OLP vault. Our team identified the issue within minutes and immediately began taking steps to contain it, including coordinating to pause trading contracts within the hour. We are working closely with relevant law enforcement authorities, SEAL 911, and third-party cybersecurity experts.
No founder ever wants to deliver an update like this. We recognize the responsibility that comes with building infrastructure that people choose to use and trust. We take that responsibility seriously, and our focus is on resolution and responding with transparency and accuracy.
To the stablecoin issuers, bridges, protocols, and security partners who have moved quickly to assist us: thank you for your continued support.
We will continue to provide updates as they arise.
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Update: All trader funds and open positions are currently preserved as-is (frozen). Funds in the trading storage contract are paused. The team is actively investigating with relevant security experts. We will provide updates as they come.
We are aware of the issue with the OLP vault. We have paused all trading. The team is investigating.
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175k points were distributed last week.
Trade the most liquid markets in the world and claim your share: app.ostium.com/trade?from=XA…
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