Cerebras Systems closed at USD 218.98, down 5.21 percent.
Options on CBRS saw heavy institutional activity dominated by a large bear put spread with a net debit of $1.82 million, alongside a $1.15 million premium-selling put combination. The day’s flow was decisively bearish, with total bearish premium of $3.75 million dwarfing zero bullish flow, underscoring strong demand for downside protection and range-bound caution.
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Options Indicators
CBRS has an implied volatility of 92.23%, but its IV percentile is just 1.61%, which indicates that despite the headline IV appearing high in absolute terms, current option pricing sits near the low end of its own historical range. Combined with an IV/HV ratio of 0.68, this suggests implied volatility is running below realized volatility, reinforcing the view that options are currently cheaply priced and that volatility expectations are relatively subdued versus the stock’s recent actual movement. The Call/Put volume ratio is 0.70.
Large Trades
A bearish put spread with a net debit of $1.82 million was the largest displayed trade, consisting of a purchase of 1,250 Aug. 21, 2026 $230.00 puts and a sale of 1,250 Aug. 21, 2026 $200.00 puts. With CBRS referenced at $218.98, the long $230.00 put was in the money while the short $200.00 put was out of the money, creating a classic bear put spread that uses a net premium outlay to express downside direction while capping maximum profit below $200.00. Strategically, this is a defined-risk bearish wager: the trader paid a net debit to gain downside exposure over the coming year, while partially financing the long put through the lower-strike short put.
A premium-selling put combination brought in a net credit of $1.15 million, built by selling 6,744 Oct. 2, 2026 $135.00 puts and selling another 1,686 Oct. 2, 2026 $135.00 puts. Both legs were out of the money versus the $218.98 reference stock price, and because this structure is a same-direction double put sale, its intent is primarily premium collection with a range-bound to mildly bearish view rather than an outright bullish stance. The trader is effectively wagering that CBRS remains comfortably above $135.00 into expiration, harvesting option premium while accepting downside assignment risk if the stock weakens sharply.
Overall large-trade sentiment was clearly bearish, with total bearish flow of $3.75 million versus bullish flow of $0.00 million, leaving a net difference of $3.75 million to the bearish side. The directional takeaway is decisively negative: even though one trade was a premium-selling structure that implies confidence in a lower strike holding, the day’s meaningful flow still leaned bearish because the dominant activity was downside-focused put positioning, led by a sizable net-debit bear put spread and reinforced by put-selling exposure that still reflects caution rather than outright upside conviction.
Strategy Reference
For sellers seeking low assignment probability, the Oct. 2, 2026 $135.00 put remains a reference point, though closer-to-the-money OTM puts like the $170.00 strike could offer a balance of premium and margin efficiency given the elevated IV backdrop. Alternatively, a bear put spread using the Aug. 21, 2026 $230.00/$200.00 strikes mirrors the day’s leading institutional flow, capping risk while aligning with the prevailing downside bias.