IWM short sellers extended their retreat for a third consecutive week — short interest has now dropped to 26.2% of the free float, the lowest reading since early May, yet bears still hold one of the heaviest positions in the ETF universe.
The covering pace has slowed but not stopped. Short interest fell another 1.6% on the week to roughly 75.9 million shares, down from 78.8 million on Monday and nearly 14 million shares below the late-June peak near 89 million. That's a material unwind — more than 15% of the short book has been retired in less than a month. The previous note flagged the move from 30.8% to 27% of float; the continuation to 26.2% is consistent with the same directional story: bears are capitulating, not rebuilding. At 26.2% of free float, however, this is still an extraordinarily elevated short book for an index ETF. "Low" is relative here — one in four shares in the float remains borrowed and sold short.
The lending market is telling a more relaxed story than it was a month ago, but conditions are not uniformly easy. Availability has loosened dramatically — it hit 122% on Tuesday, meaning shares available to borrow now exceed shares already lent out, compared to a dangerously tight 40% reading on July 6th. Cost to borrow has eased alongside, now running at 0.94% — down more than 20% from mid-June levels above 1.7% and near its lowest point of the past six weeks. But availability has been swinging sharply day-to-day: it compressed back to 61% on Monday before reopening. That volatility in the lending pool suggests the borrow market has stabilised but not normalised. The 52-week low in availability was 0.98% — the lending market has been genuinely tight within this calendar year — and the current looseness looks more like a lull than a structural change.
Options positioning adds nuance to the bearish picture. The put/call ratio on IWM is running at 2.66, essentially in line with its 20-day average of 2.62 and just half a standard deviation above it. That's a structurally elevated ratio — IWM routinely carries heavy put volume as institutions use it for macro hedges — but the current reading is not signalling fresh defensive positioning. The 52-week high for the PCR was 3.03, hit in mid-June at the peak of short interest; the current 2.66 is closer to the middle of the past year's range. Options traders are not adding to their hedges this week even as the broader short unwind continues.
The ORTEX short score has drifted lower in tandem with the covering. It reads 67.5 today, down from 70.4 on July 8th — a meaningful move given the tight range these scores typically occupy. A score above 60 still flags elevated bearish conviction relative to the broader universe, but the direction of travel is unambiguous: the score has declined every day this week. Price action has given shorts little reason to stay in — IWM gained 1.4% on Tuesday and is up 0.7% on the week, trading at $296.54. The one-month gain of just 0.3% is modest, but the stock has not broken down, which is exactly the setup that forces gradual short covering from institutional players running crowded macro hedges.
Institutional holders remain the dominant force in the lending market. Morgan Stanley added 13 million shares in Q1, the single largest reported position change among top holders, while Goldman Sachs added 4.5 million and Citigroup added 5.3 million. These are predominantly broker-dealer holdings, consistent with market-making and structured product activity rather than directional long bets. Wells Fargo trimmed 2.4 million shares over the same period. The holder mix — heavy on broker-dealers, lighter on pure long-only money — reflects IWM's role as a hedging and structuring vehicle, which helps explain why short interest remains structurally elevated even as the marginal direction is toward covering.
The key tension to watch is whether the short book stabilises around current levels or continues declining toward the 20–22% range where IWM spent much of late 2025. At 26.2%, the bearish overhang is still large enough that any acceleration in small-cap earnings momentum or a rate-supportive macro read could trigger a sharper squeeze — availability loosening to 122% removes one technical barrier to new shorts, but it also means the lending pool can absorb covering without the kind of forced squeeze dynamic the 40% availability reading implied two weeks ago.
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