Bears Slam Cerebras, Car Rentals As Wolfspeed Shorts Flee

Short sellers made bold moves last week. Cerebras Systems saw the biggest jump among sizeable US stocks. Its short interest as a percentage of free float leapt from 6.3% to 30.3% — a near-fivefold rise in just seven days. The AI chip firm is facing intense scrutiny after a volatile start to life as a public company.

Car rental stocks remain a bear favourite. Hertz hit 44.6% SI% FF, up from 39.8%. Avis Budget Group also climbed to 44.8%. Both face pressure from weak used-car markets and high debt loads.

Birkenstock shorts piled in too. SI% FF rose from 21.8% to 29.9% over the week. Grindr jumped from 11.8% to 22.3%.

On the flip side, Wolfspeed short sellers are running for the exit. SI% FF collapsed from 119.7% to 88.1% — a drop of over 31 points. Oklo also shed 4.9 points as nuclear power sentiment improved.

Among social media darlings, GameStop sits at 12.3% with minimal change. Tesla remains lightly shorted at just 2.8%. NVIDIA holds near a record low of 1.2%.

Data as of June 12, 2026. Not financial advice.