Why this matters: USO is flashing a rare combination of signals. Short interest just dropped 27% in a single day. The put-call ratio hit its highest level in a year. Cost to borrow surged 134% in a week. Three distinct datasets are all moving at once — and they aren't pointing in the same direction.
Short interest in USO fell from roughly 14.1 million shares to 10.2 million in one session. That's a 27% drop in a single day. SI as a percentage of free float now stands at 77%. That's down from 104% reported in the August 19 trader note, and sharply lower than the 93% flagged in the August 24 generic note. The direction is clear: bears are covering aggressively as crude oil retreats.
The one-month change confirms this isn't a one-day quirk. Short interest is down 16% over the past 30 days. The unwind has been building.
The put-call ratio hit 2.24 on August 24 — the highest reading in a year. The 52-week range is 0.56 to 2.52. Tuesday's spike placed the PCR very near the top of that range. By August 25 the PCR had pulled back to 1.22, still above the 20-day mean of 1.16.
Two interpretations sit side by side here. Short sellers in the stock-lending market are covering. Options traders were simultaneously piling into puts. Those two signals pulled in opposite directions on the same day.
Cost to borrow rose to 3.90% on August 25, up 134% on the week. That compares to just 1.67% on August 18 — the low flagged in the previous trader note. CTB has now partially retraced back toward the 4–5% range it held through most of July and early August.
Availability stands at 160% — meaning roughly 1.6 shares remain available to borrow for every share already lent out. That's a normal-to-tight reading. It has loosened meaningfully from the sub-30% availability seen on August 6–7, but remains well below the 346% peak hit on August 11.
The pattern across recent weeks: availability spikes, CTB falls, then the cycle reverses. That dynamic is playing out again now.
Goldman Sachs holds 45% of reported institutional shares in USO, with a modest addition of 267k shares last reported to June 30. Morgan Stanley added 1.1 million shares in the same period. Healthcare of Ontario Pension Plan entered a new position of 1.1 million shares. These are Q2 filings — they predate the current crude retreat — but the scale of institutional presence is relevant context for understanding who holds the other side of the short interest.
See the live data behind this article on ORTEX.
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