At 9:30 AM Eastern, someone hit the turbo button on Cerebras Systems. The stock opened at $350 — 89% above its $185 IPO price. Within 47 minutes it spiked to $386.34 before the first trading halt. Volume: 32 million shares. This is the largest tech IPO of 2026 and the third-fastest first-day pop in AI sector history.
What Happened
Cerebras, maker of the world's largest AI chips, originally planned its IPO for 2024. Regulatory hurdles over G42 (its UAE partner generating 85% of revenue) delayed the listing by two years. When clearance came, demand exploded: 20x oversubscribed. The price range was raised from $115-125 to $150-160, then finalized at $185. The company raised $6.4 billion — valuation: $55 billion.
On trading day one, nobody cared about fundamentals anymore. The opening print at $350 was already 89% above IPO. Retail brokers reported queue lengths of over 400,000 orders in the first 10 minutes. Institutional buyers who missed allocation chased every available share. By 10:17 AM, CBRS hit $386.34 — up 109% from IPO. Then came the first volatility halt.
The Options Side
Options on CBRS don't start until the third trading day — standard rule for IPOs. But the implied IV floor is already visible: market makers are pricing estimated 180-220% implied volatility for the first at-the-money calls, based on similar AI IPOs (e.g., Arm Holdings 2023: 165% IV at options launch). Translation: whoever buys the first calls on Friday pays massive time-value premium.
More interesting: the synthetic forward price (calculated from stock borrow costs and expected volatility) sits at $420 for June expiry. That implies another 35% upside from today's level — or a brutal collapse, depending on how Q3 earnings land. Buyers now are betting on continued retail FOMO, not fundamentals.
What Traders Are Watching
The $400 level is psychologically critical. If CBRS closes above $400, the first short sellers (who entered at $350-370) will be forced to cover — classic short squeeze setup. The insider lock-up expires in 180 days (November 2026). Until then, theoretically nobody can sell except the IPO buyers who got in at $185.
Cerebras has deals with OpenAI ($20B) and AWS in its portfolio. The real question: can the company grow profitably, or will it burn cash like Rivian 2021? Q2 earnings are expected in August — until then, CBRS trades on hype, momentum, and IV. For options traders that means: wait until the first Greeks are visible, then spreads instead of naked calls.
Disclaimer: This article is for informational purposes only and does not constitute investment advice. Past performance is not indicative of future results.