The lending pool for MUFG has effectively run dry. Availability has collapsed to just 0.33% — one share available for every 300 already borrowed — the tightest reading in 52 weeks.
Cost to borrow stood at 0.83% a month ago. It crossed 1.3% last week. As of September 28, it sits at 2.84% — a 119% weekly rise and a 244% one-month surge.
That trajectory is steep even by Japanese megabank standards, where share-lending markets tend to be deep and well-supplied. A near-tripling of borrow cost in five sessions points to a sudden, concentrated demand for short positions.
Estimated short interest reached 6.6 million shares on September 28. That is up 8.2% in a single day and 12.4% over the past week. Over 30 days, shorts have grown 34.8%.
The pace of build is notable. MUFG is a large, liquid ADR — not the kind of name that typically sees rapid short interest accumulation. The month-long climb from roughly 4.9 million to 6.6 million shares is a clear directional statement from short sellers.
The official FINRA fortnightly figure, as of September 15 settlement, showed 5.4 million shares short and 1.76 days to cover — already elevated before the latest acceleration.
The speed of the availability squeeze tells the real story. Five weeks ago, availability was above 47%. Two weeks ago it was still above 20%. By September 22 it had fallen to 0.68%. Now it sits at 0.33% — near the 52-week floor of 0.29%.
Every meaningful share in the lending pool is already lent out. Short sellers who want to build further positions face both supply scarcity and a cost that has more than doubled in a week.
Earnings are scheduled for November 13. The options market currently shows a put/call ratio of 0.44, well below the 20-day mean of 0.84 — call interest is outpacing puts despite the lending market stress, a divergence worth monitoring as the quarter closes.
See the live data behind this article on ORTEX.
Open MUFG on ORTEX →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.
