Cerebras Systems closed at $96.36, down 11.74%.
Despite the sharp single-day decline, large options activity skewed bullish. A bull put spread generated a net credit of $1.08 million, while a deep out-of-the-money put purchase worth $1.50 million appeared defensive rather than aggressive. The overall block flow showed traders selling downside premium and defending lower strikes, reflecting confidence in price support.
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Options Indicators
Cerebras Systems currently has an implied volatility of 15.36%, and with an IV percentile of just 0.85%, its volatility sits at the very low end of its recent range, indicating that options are cheaply priced rather than carrying an elevated premium. The IV/HV ratio of 0.20 further supports the view that implied volatility is subdued relative to realized movement, suggesting the options market is assigning a light near-term volatility premium. The Call/Put volume ratio is 0.44.
Large Trades
A bull put spread collecting a net credit of $1.08 million was one of the standout large trades, pairing the sale of 5,498 Nov. 20, 2026 $90 puts with the purchase of 5,498 Jan. 15, 2027 $70 puts. With CBRS referenced at $96.36, both strikes were out of the money, making this a moderately bullish premium-selling structure that benefits if the stock holds above the short put strike and avoids a deeper decline. The net credit signals the trader was willing to take downside exposure in exchange for income, while the long lower-strike put defines risk, suggesting a constructive outlook rather than an outright aggressive bullish chase.
A bearish single-leg put purchase worth $1.50 million targeted the Jun. 16, 2028 $60 put, with 1,040 contracts bought outright. That strike sat well out of the money versus the $96.36 reference price, so the trade looks like a longer-dated downside hedge or a lower-probability bearish bet on a substantial drawdown over time. Even so, the broader block activity still leans clearly bullish, because the dominant large-trade flow was concentrated in premium-collecting bull put structures and other downside-selling activity that reflects confidence in price support. Overall, institutional positioning appears bullish on balance, with traders showing a greater willingness to monetize downside volatility and defend lower levels than to pay up for outright bearish protection.
Strategy Reference
For a low assignment probability, a put seller could consider the Nov. 20, 2026 $90 strike, which is about 6.60% below the close and already featured in the large bull put spread; alternatively, a put credit spread at $90/$70 offers defined risk without tying up as much margin as a naked short put.