XLU borrow market tightens again as shorts rebuild

The "stabilisation" story from last week is over. XLU shorts are back on the move — and the borrow market is responding fast.

Short interest has climbed to 11.3% of the free float. That's a 10.4% weekly jump in shares borrowed, reversing the quiet consolidation noted on June 17. The prior note flagged a shaken-out short base finding a new level. Instead, fresh shorts have piled back in.

Borrow market tightens sharply

Availability has collapsed from 64.4% last week to just 15.7% today. That means roughly one share is available to borrow for every six already lent out. A week ago the market was merely tight. Now it's very tight.

The move has been rapid. Availability was still above 50% as recently as June 17. It dropped to 32% on June 18. By June 22 it stood at 15.7%. The direction is clear.

Cost to borrow has moved with it. CTB hit 0.81% on June 22 — up 141% in one week from 0.34% on June 15. In absolute terms the rate remains low. But the velocity matters. The lending market is repricing the difficulty of establishing new short positions in real time.

This echoes the late-May episode. Availability bottomed at 5.4% on May 21 when the borrow market was fully exhausted. The current trajectory — 15.7% and falling — points toward a retest of those conditions if short demand keeps building.

Options traders push the other way

One signal cuts against the bearish short flow. The put-call ratio dropped to 2.33, sitting 2.2 standard deviations below its 20-day mean of 2.53. For a fund with a structurally elevated PCR, this is a meaningful move toward the call side.

Note the context: XLU's PCR has run between 2.5 and 2.7 for most of the past month. Puts dominate because institutional holders routinely buy downside protection on utility ETFs. A drop to 2.33 signals that the balance is shifting — fewer hedgers, more buyers of upside exposure.

That divergence — shorts rebuilding in the lending market while options traders trim their put exposure — is the tension worth watching here.

Data summary

• Short interest: 11.3% of free float, up 10.4% in one week
• Availability: 15.7% (down from 64.4% a week ago; 52-week low: 5.4%)
• Cost to borrow: 0.81%, up 141% week-on-week
• Put-call ratio: 2.33, –2.2 standard deviations below 20-day mean
• ORTEX short score: 55.5, up from 53.4 on June 15
• Price: $44.72, down 1.4% over the past month