Share 
Bonus TL;DR
- Polymarket is targeting a November migration to a newly rebuilt, Rust-based trading engine to replace its current central limit order book, a critical infrastructure upgrade aimed at resolving the recurring API outages and scaling bottlenecks that have plagued the rapidly expanding prediction market platform.
- Following a disruptive nine-hour API outage in early September, the company expects to finalize the end-to-end order book system in October, opening access for market-maker testing before executing two full system rehearsals to ensure stability ahead of the final November launch.
Polymarket is targeting a November migration to a new Rust-based trading engine as it tries to fix the outages and scaling problems tied to its current central limit order book.
The timeline matters because Polymarket says the rebuild will power both PM and perps trading, and comes after several recent operational issues. According to comments from Josh Stevens, Polymarket’s VP of Engineering, the end-to-end order book system is expected in October, followed by testing in November, including access for market makers.
Stevens said the “November-migration cutover plan locked, with 2x full rehearsals before we flip anything. If all goes well, we then release it.” He also said “the current CLOB is the system behind most of the issues we see today, so we’ve got all hands on deck building the new one.”
Rollout follows recent trading and API problems
The new engine is meant to replace infrastructure Polymarket has previously described as difficult to scale. Last month, Stevens said the company had “hacked together” its DeFi CLOB, a setup he said had become hard to improve for performance.
That context helps explain the urgency. In early September, Polymarket had a prediction trading API issue that took 9 hours to resolve. Its perps business also had operational hiccups in August and September.
Polymarket had already upgraded its engine once this year. In April, the company rolled out a V2 engine update that added support for Polymarket USD, a USDC-backed stablecoin. Polymarket said that upgrade increased throughput from more than 1,000 orders per second to more than 10,000 orders per second, while also reducing average transaction costs.
Volume growth raises the stakes for the migration
The rebuild is landing as trading activity rises sharply. As of September, Polymarket’s U.S. weekly volume had climbed to nearly $800 million, while the broader prediction market posted a record $63 billion in volume that month ahead of the U.S. midterm election.
Polymarket Perps remained much smaller, with daily volume still below $150 million.
What comes next is clear from the company’s timeline: the end-to-end order book is expected in October, testing and market maker access are planned for November, and the migration will include two full rehearsals before any cutover goes live.
The company has also faced market speculation around a possible POLY token launch, but the market was pricing only a 6% chance of a release before 2027.
Source: As reported by news.google.com.
