Bears Pile In: Hertz and CoreWeave Lead the Week's Big Movers

Short sellers made bold moves this week. HTZ saw the biggest surge among mid-caps. Hertz short interest jumped 18 percentage points in seven days. It now sits at 62.6% of free float. Borrowing costs remain low at 1.35%, suggesting bears still have room to add.

WOLF remains the most-shorted mid-cap in the US. Wolfspeed's short interest hit 132.2% of free float. It climbed another 27.5 points in a week. Zero shares are available to borrow — the squeeze risk is extreme.

CRWV is a notable new addition to the bear radar. CoreWeave's SI jumped nearly 7 points to 28.9% of FF. The $43bn AI cloud company is drawing heavy scepticism despite its high-profile Nasdaq listing. Availability stands at a comfortable 334%, so shorts can still pile in.

On the other side, covers dominated in rental cars. CAR (Avis Budget) saw short interest fall 7.3 points to 39.2%. DD (DuPont) shed 5.7 points. Both suggest bears trimmed risk into month-end.

SOUN remains a social-media favourite. SoundHound AI holds 41.4% SI. Cost to borrow is elevated at 15.8%, with zero availability. Retail bulls betting on a squeeze face real headwinds.

CHWY at 69% SI has massive availability at 728% — no squeeze fuel there.