Cerebras Systems closed at USD 167.92, down 4.07% from the prior session.

Large options trades leaned bearish in the session, highlighted by a $1.37 million in-the-money put purchase on the October 2026 $170 strike. The block stood out against a backdrop of unusually subdued volatility pricing, with IV percentile at just 13.00%, suggesting institutional traders sought direct downside exposure rather than cheap sideways exposure.

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Options Indicators

Cerebras Systems has an implied volatility of 74.44%, while its IV percentile sits at 13.00%, which indicates that although the absolute IV level is high, it is low relative to its own recent history. In other words, volatility is currently on the low side for this name and options appear cheaply priced rather than expensive. With an IV/HV ratio of 1.16, implied volatility is running modestly above historical volatility, suggesting the market is pricing in somewhat higher forward uncertainty than what has recently been realized, but not to an extreme degree.

The Call/Put volume ratio is 1.01.

Large Trades

A PUT buy worth $1.37 million stood out as the key large trade, with 1,300 contracts bought on the October 16, 2026 $170.00 put. With CBRS referenced at $167.92, this strike was in the money at execution, which makes the position a notably defensive and bearish expression. Buying an in-the-money put at this tenor suggests the trader was seeking meaningful downside exposure or portfolio protection, using a relatively high-delta contract to benefit from continued weakness in the stock while limiting risk to the premium paid.

Overall, the large-trade flow in CBRS was clearly bearish. The only notable block in the tape was an in-the-money long put purchase, indicating demand for downside protection or a direct negative view on the shares rather than income generation or neutral positioning. With no offsetting bullish large trades appearing alongside it, the bulk-order activity points to cautious sentiment and an expectation that CBRS could remain under pressure over the medium term.

Strategy Reference

For traders wary of chasing the high implied volatility move, a put credit spread using the $140/$130 strikes for a nearer-dated expiration can define risk while aligning with the cautious tone, though assignment probability rises if Cerebras Systems breaks below $140.00.