QMOM, the Alpha Architect U.S. Quantitative Momentum ETF, heads into mid-May with a striking divergence: short interest nearly doubled over the past month while the borrow market remains exceptionally loose.
The most interesting tension here is in the short interest trajectory. Estimated shorts climbed roughly 49% over the past month, from around 20,800 shares in mid-April to just over 31,000 shares by May 12. The move is sharp in percentage terms. In absolute numbers, though, it remains very small — short interest represents only about 0.59% of the float. That barely registers as a meaningful short position for a fund of this nature.
The borrow market confirms that the buildup is not creating any friction. Availability is exceptionally wide at 1,278% of short interest — meaning the lending pool dwarfs the amount currently borrowed by more than 12 times. Cost to borrow is running at 3.7%, broadly unchanged over the past week and up only modestly from a month ago. Nothing in the lending data points to crowding or squeeze risk. Over the past week short interest actually fell about 12%, retreating from a brief spike around May 4–7 when shares jumped to ~35,000–36,000 before pulling back sharply. That spike-and-fade pattern looks more like tactical short-term hedging than a structural bearish build.
Options positioning has shifted more defensive than it was through most of April. The put/call ratio is running at 0.55, above its 20-day average of 0.41. The z-score of about 1.05 puts this in elevated-but-not-extreme territory — well short of the 52-week high of 0.78 reached briefly on May 7. It's a mild shift toward caution, not a signal of conviction on the downside. On the price side, the ETF is up 1.9% over the past week and 7.3% over the past month, closing at $79.19 on May 12. The one-day dip of 0.9% on May 12 appears to be noise against a strong monthly backdrop.
The ORTEX short score of 36.1 confirms there is no meaningful short-side pressure. The score fell from the low 40s at the start of May — when short interest briefly spiked — back toward the mid-30s as positions unwound. A score in this range sits comfortably in the lower half of the universe, consistent with a liquid, widely available ETF that is not a natural short target. The combined ORTEX score of 35.7 echoes the same picture. There are no analyst ratings, earnings events, or insider activity relevant to an ETF structure, so the traditional fundamental angles don't apply here.
Overall, the positioning story looks more mechanical than directional: the short interest spike appears to have been a short-lived hedging move, borrow availability remains extremely ample, and options sentiment has drifted only modestly more cautious. What to watch is whether the short interest bounce that emerged in early May re-accelerates, or whether the continued unwind — down 12% on the week — continues as the broader momentum factor recovers.
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