Short sellers made a dramatic move into SPCX this week. Space Exploration Technologies' short interest jumped from 3.65% to 25.2% of free float — a 21.6 percentage point surge in just seven days. That's the biggest single-week increase across large-cap US stocks. Availability sits at just 37%, signalling shares to borrow are tightening fast.
FRMI (Fermi Inc.) also drew fresh bearish attention. Its SI % FF rose from 10.2% to 25.6%, up 15.4 points in a week. TNGX — Tango Therapeutics — holds the highest absolute reading at 68.6% of free float, up from 54.3% last week, with a cost to borrow of just 0.6%.
On the flip side, WOLF saw a sharp short squeeze dynamic emerge. Wolfspeed's SI plunged 16.5 points to 82.7% of free float — still extreme, but shorts are clearly exiting. Availability is zero, meaning no new short positions can be opened.
MQ (Marqeta) saw its SI drop from 14.5% to just , the steepest percentage unwind of the week.
PSKY (Paramount Skydance) attracted news-driven attention after 12 state attorneys general sued to block its $110B Warner Bros. merger. Its SI currently sits at 9.3% of FF, a level worth watching if the legal battle drags on.
ORTEX Market Intelligence content is generated by AI from a snapshot of ORTEX's proprietary data. Content is informational only and does not constitute investment advice.
