Bears Pile In: Cerebras and Birkenstock in Focus

Short sellers have been busy this week. CBRS saw the biggest jump among US names. Short interest as a % of free float leaped from 6.25% to 25.6% in just seven days — a 19-point spike. Cerebras, the AI chip firm, carries a $7.4 billion market cap. The surge in shorts suggests traders are doubting its lofty valuation.

BIRK also drew heavy attention. SI % FF rose to 30.2% from 21.9% last week. Its cost to borrow hit 16.3% — the highest among the names tracked. Bears appear to be questioning the luxury sandal maker's growth story amid rising consumer caution.

Rental car stocks remain a battleground. CAR sits at 45.8% SI % FF, up 6 points on the week. HTZ stands at 44.5%, also rising. Shorts are pressing both names hard as the sector faces fleet cost pressure.

On the other side, WOLF shorts cut exposure sharply. Wolfspeed's SI fell from 112% to 95.7% — a 17-point drop. Still near max, but shorts are cautiously exiting. Availability sits at zero, meaning no more shares are easy to borrow.

GRND rounds out the watch list. Grindr's SI doubled in a week to 22.2%. Social chatter has picked up around the stock. Squeeze risk is building.