SMFG Borrow Market Hits Annual Low as Cost Jumps 369%

Why this matters: The lending market for SMFG just crossed a threshold that directly restricts the ability to open new short positions. Availability has collapsed to 1.6% — the tightest reading in 52 weeks — while cost to borrow has surged nearly fourfold in a week.

Borrow Pool Effectively Exhausted

Availability hit 1.57% on Sept. 17. That means roughly one share remains available to borrow for every 63 already lent out. A week ago, availability stood at 55.8%. The drop of 97% in a single week is abrupt even by the standards of large-cap ADRs.

At this level, initiating or expanding a short position in SMFG becomes a sourcing problem, not just a cost question.

Cost to Borrow Spikes Fourfold

The cost to borrow rose to 1.54% on Sept. 17, up 369% from the prior week. The Sept. 10 reading was just 0.33%. That single session — sitting well below the surrounding days — appears to have been an outlier, but even stripping it out, the underlying rate has climbed materially. On Aug. 31, CTB was 1.71%. The current level is approaching that recent peak while availability is far tighter.

The combination matters: higher cost and lower supply together signal genuine demand pressure in the borrow market, not just a data anomaly.

Options Positioning Shifts

The put/call ratio moved to 0.27 on Sept. 17, up from a 20-day mean of 0.18. The z-score of 1.4 is elevated but not extreme. What's notable is the direction — the PCR had been pinned near 0.15 for most of August before climbing through September. More put buying relative to calls is consistent with hedging activity picking up as borrow becomes harder to source.

What to Watch

• Whether availability recovers above 10% — at sub-2%, any further demand for borrows has almost nowhere to go.
• Cost to borrow relative to the Aug. 31 peak of 1.71% — a break above that level would mark a new near-term high.
• SMFG's next earnings event is scheduled for Nov. 13. Positioning shifts in the weeks ahead of that date will be worth monitoring.

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Data summary

• Availability: 1.57% (Sept. 17) vs. 55.8% one week prior — 52-week low
• Cost to borrow: 1.54%, up 369% week-on-week
• Put/call ratio: 0.27 vs. 20-day mean of 0.18 (z-score 1.4)
• Short score: 53.9 (Sept. 16), drifting gradually higher over the past two weeks
• Next earnings: Nov. 13, 2026