Bears Circle Cerebras and Grindr as SI Jumps

Short sellers added pressure to several mid-cap names in the five days to 27 October, with CBRS and GRND seeing the sharpest moves among stocks worth over $500 million.

Cerebras Systems, the AI chip maker, saw short interest climb 5.5 percentage points to 20.4% of free float. That is a notable jump for a $13 billion company. Bears appear unconvinced by the AI hardware rally. Talen Energy also drew fresh shorts, rising 4.3 points to 10.5% of free float.

Grindr short interest rose 7.2 points to 21.7% of free float in the same window. Dating app stocks have faced skepticism on user growth and monetisation.

At the extreme end, Wolfspeed remains one of the most heavily shorted large-caps. It sits at 88% of free float with a short score of 77. The semiconductor firm has shed 84% of its value this year.

EverCommerce carries the highest short score among stocks above $1 billion, at 97, with 14.9% of float shorted and a cost to borrow of 91%. Availability stands at just 0.4%, meaning it is nearly impossible to add new short positions.

Lucid Group, the electric vehicle maker, remains deeply shorted at 65% of free float. The stock is down 58% over three months. The Index Rebalance Radar flags Twist Bioscience as the week's live wildcard. Its odds of leaving the Russell 2000 for the Russell 1000 jumped from 20% to 55% overnight, with the 30 October rank date arriving Friday. A $529 million buying flow hangs on which side of the line it closes.