CBRS Perp Converges With Cerebras' Nasdaq Debut Tape Near $327

The Basis Trade Closes

The xyz:CBRS perp is trading at $327.10, up 15.16% over the past six hours and now within roughly a dollar of where NASDAQ:CBRS is printing in its first session. The contract has effectively converged with the public tape. For most of the morning the perp ran a sizable premium to the cash open — printing as high as $387 against a $350 reference — but the entire day-one basis has now compressed into a single mark. There is no longer a private-market discount to arbitrage, and the contract is a straightforward synthetic of CBRS common stock from here.

How the Day Got Here

Cerebras priced its IPO at $185 per share last night, above the $150–$160 range underwriters had raised the deal into earlier in the week. The offering raised $5.55 billion, making it the biggest U.S. listing of 2026 to date and the largest tech IPO since the AI boom began. The cash stock opened at $350 — nearly double the IPO price — and shares roughly doubled in the first post-IPO trades before drifting into the high $320s as the post-open frenzy faded.

Where the Trade Goes From Here

The xyz:CBRS perp existed precisely because there was no public mark to trade against — only Hiive's $220.90 secondary close and the moving underwriter range, which CNBC noted had been raised twice as demand built. That edge is gone. The contract now sits next to a live cash equivalent ticking second-by-second on Nasdaq, and the 20x-oversubscribed book that lifted the offering off a $115–$125 initial range has already done its work. From here the perp should track NASDAQ:CBRS print-for-print, with basis widening only on overnight risk or post-market events that create a real spread between venues. The pre-IPO story is over; this is a single-name AI-chip perp now.