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The story on DIA this week is a reversal of the dynamic flagged in the previous note: the borrow market has eased materially while short interest has jumped, and options positioning has settled into a holding pattern rather than pushing further in either direction.
The borrow picture has changed considerably since the October 7 note described tightening availability. Availability has swung from 74% to 224%, a near-tripling in a week. That is a meaningful loosening: there are now roughly 2.2 shares available to borrow for every one already lent out. The cost to borrow remains low at 0.81%, though it has risen 11% on the week after an unusual spike to 1.59% on October 9 before settling back. The 52-week minimum availability was 4.46%, so even the tightest recent readings were far from a genuine squeeze; the current reading puts borrow conditions firmly back in comfortable territory.
Short interest, however, has moved in the opposite direction. At 4.1% of the free float, it has risen 24% over the past week, reversing a month-long declining trend. FINRA's most recent fortnightly print from September 30 put short shares at 3.73 million, broadly consistent with the daily estimate. The short score on October 12 sits at 51.1, up from 43.9 at the end of September. That is a mid-range reading, not an extreme, but the directional move over the past two weeks is worth noting: this is a market where short positioning has been rebuilding quietly while the borrow pool has simultaneously opened up, making new shorts cheaper and easier to establish.
Options sentiment has cooled from the near-extreme call-heavy positioning described in the last note. The put/call ratio has edged up to 1.23 from 1.21, still below its 20-day average of 1.31 and roughly 0.67 standard deviations below that mean. The prior note called the PCR near its 52-week low; the actual 52-week low is 1.15, reached earlier in October, and the current reading has drifted fractionally higher. Options traders are no longer at peak bullishness, but they remain tilted toward calls rather than puts. The 52-week high of 2.22 remains a long way from here, so the defensive hedging that dominated September has not returned.
Institutional ownership shows a spread of broker-dealer and asset-manager positions consistent with ETF usage: Morgan Stanley holds 3.84% as of June 30 but trimmed by 337,000 shares, while SG Americas and IMC Trading added 721,000 and 1.14 million shares respectively over the same period. These are largely market-making and intermediary flows rather than directional conviction, which is typical for a vehicle like DIA. The ETF closed at $516.21 on October 13, off 0.33% on the day but up 0.32% on the week and down 1.8% over the past month.
What to watch next is whether the rebound in short interest continues to build against the backdrop of easier availability, and whether the PCR drifts back toward its 20-day mean or breaks back toward the September defensive highs above 1.50.
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