TLT has broken the trend that defined the past several weeks: short sellers, who had been steadily unwinding through early July, have snapped back — and the borrow market has tightened sharply to match.
The most important development this week is a reversal in short interest. The previous two notes tracked a steady unwind from a June peak of roughly 104 million shares short down to around 91 million by July 9. That move has now partially reversed. Short interest jumped from 90.6 million on July 9 to just over 100 million by July 10-13, before settling at 99.2 million as of July 16 — a weekly increase of 9.4% of free float. At 17.9% of free float, the position is back near its recent highs. This is a meaningful change of direction, not noise. The previous two articles described an "unambiguously lower" trend in short interest; that characterisation no longer holds.
The borrow market tells the same story, but in reverse. A week ago, availability had reached 906% — one of the loosest readings in the recent data window, with roughly nine idle shares for every one borrowed. That pool has now tightened sharply. Availability has pulled back to 676%, down 25% on the week, as demand for borrowed shares picked up alongside the rebuild in short interest. Cost to borrow has also moved higher, rising 33% on the week to 0.49% — its highest level in a fortnight, though still low in absolute terms. Borrow conditions remain comfortable overall; 676% availability is still well into "normal" territory. But the direction has flipped from loosening to tightening, which mirrors the shift in positioning.
The ORTEX short score has stabilised rather than continued its prior decline. It ranged between 55 and 59 over the past two weeks, and is running at 57.2 today. The earlier slide — from 66 in late June to 55 by July 9 — has arrested. A score above 50 still indicates net bearish pressure on the signal composite, and the score's recent floor near 55 now looks less like a floor than a pause.
Options positioning is tilted more toward calls than puts. The put/call ratio has drifted down to 0.68, below its 20-day average of 0.70, and the z-score is modestly negative at -0.76. That reading is close to a 52-week low of 0.59, suggesting that while the broader options market isn't strongly defensive on TLT right now, there is room for that to shift if the short-side rebuild continues. The slight call bias could reflect hedges against rising bond prices, or simply mechanical ETF activity — but it sits in mild contrast to the renewed shorting pressure in the lending market.
The institutional holder register is worth noting as context. The top holders are a mix of wealth management platforms and dealer books — Northwestern Mutual, Bank of America, Managed Account Advisors — many of which run TLT as a duration hedge rather than a directional bet. Bank of America cut its position by 24.8 million shares as of the March quarter-end, and Morgan Stanley trimmed by 8 million. Those are large reductions from firms that likely held TLT as a hedge rather than a conviction long. On the other side, BlackRock and BMO both added modestly. The holder base suggests TLT's flows are as much about portfolio construction as pure rate views.
With no earnings catalyst on the calendar and analyst data too stale to be informative, the next thing worth watching is whether the short rebuild sustains through the month-end period — and whether the borrow pool continues to tighten as demand for fresh short positions competes with the ample supply that still remains in the lending market.
See the live data behind this article on ORTEX.
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