Cerebras Systems closed at $209.85, down 2.71%.
CBRS options saw one dominant large trade: a four-leg calendar call spread opened for a net credit of $1.60 million. The structure involved selling later-dated 215 and 222.5 calls while buying nearer-dated 230 and 237.5 calls, all out of the money. With total bearish flow of $1.70 million against just $104 thousand in bullish flow, the session finished with a clearly negative net imbalance of $1.60 million.
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Options Indicators
CBRS has an implied volatility of 91.58%, but its IV percentile is only 1.52%, which indicates that despite the high absolute IV level, current option pricing sits near the bottom of its own historical range. In other words, volatility is on the low side relative to where this name’s options have typically traded, and with an IV/HV ratio of 0.64, implied volatility is also running below realized volatility, reinforcing the view that options appear cheaply priced rather than expensive.
The Call/Put volume ratio is 3.40.
Large Trades
A calendar-style CALL combination with a net credit of $1.60 million was the standout large trade, structured as a four-leg diagonal/calendar call spread by selling 1,182 contracts of the 2026-08-28 215.0 CALL and 1,182 contracts of the 2026-08-28 222.5 CALL, while buying 1,182 contracts of the 2026-08-21 230.0 CALL and 1,182 contracts of the 2026-08-21 237.5 CALL. With the stock reference price at $209.85, all four strikes were out of the money, and the strategy was clearly initiated for premium collection via a net credit rather than for immediate upside participation. The trade expresses a restrained-to-bearish outlook, as the trader is willing to cap risk with the nearer-dated higher-strike long calls while leaning on the richer premium from the later-dated short calls above spot, suggesting expectations that CBRS will remain below those short strikes or at least fail to rally aggressively in the relevant window.
Overall sentiment in the bulk orders was bearish, with total bullish flow of $104 thousand versus total bearish flow of $1.70 million, leaving a net bearish imbalance of $1.60 million. The directional conclusion is clearly negative, because the day’s only highlighted large trade was a net-credit call combination built entirely with out-of-the-money strikes above the current stock price, a structure consistent with premium harvesting and a view that upside is limited rather than accelerating.
Strategy Reference
For traders seeking a low assignment probability, selling the 2026-08-28 222.5 CALL as a standalone short call may offer a favorable risk profile, though a defined-risk bear call spread such as selling the 215.0 CALL and buying the 222.5 CALL could reduce margin exposure while still capitalizing on the subdued IV environment.
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