Bears Circle MiniMed, Wolfspeed Tops 82%

Short sellers stepped up pressure this week on several mid-cap names. MiniMed Group is the week's standout mover. SI % of Free Float jumped 11.3 points in seven days to 38.5%. Borrowing costs sit at 20.4% APR. Availability has collapsed to just 0.5% of short interest — almost no stock left to borrow.

Wolfspeed remains one of the most compressed names in the market. SI hit 82.4% of free float with zero shares available to borrow. The chip maker's stock has fallen 59% over three months. That combination — no borrowable stock, heavy positioning — is classic short-squeeze fuel.

Braveheart Bio is in a different league entirely. SI stands at a staggering 226% of free float, up 36 points in a week. The stock has a $1.8B market cap, 4 analyst buy ratings, and a CTB of 10.4%. Watch this one closely.

In jewellery, Signet Jewelers saw its short position climb 3.4 points to 17.8% this week. The $3.9B retailer faces a tough consumer backdrop.

On the meme side, GameStop shorts are actually easing. SI dipped to 0.89% — the squeeze thesis is firmly dead. Rivian holds at 17.6% with little weekly movement.

Meanwhile, JP Morgan flipped back to Overweight on Ball Corporation as short sellers build positions — an interesting contrast of bullish analyst calls against bearish positioning.