AIPO Shorts Rebuild as Options Traders Turn More Bullish

Defiance's AIPO ETF enters the final days of October with a notable split: short positions are rebuilding fast, yet options traders have shifted in the opposite direction, unwinding a prolonged defensive posture.

The short interest story is the week's dominant angle. Borrowed shares climbed 21.6% over the past week to 27.6% of free float, a meaningful jump for a fund that had been shedding short positions through most of October. The one-month picture still shows an 11% decline in shares short, so this week's rebuild is a reversal rather than a continuation. Availability has tightened to 48.3%, down sharply from 73% a week ago, meaning roughly one share is still available for every two already lent. The 52-week low in availability was 15.7%, hit on October 13, so there remains room to tighten further. Cost to borrow, at 1.88%, has eased around 10% on the week and remains subdued, suggesting the demand for borrows has not yet translated into a supply squeeze. The ORTEX short score sits at 52.2, essentially flat over two weeks, consistent with a market that is rebuilding short exposure methodically rather than rushing.

Options positioning tells a different story. The put/call ratio has collapsed from above 7 in late September and early October to 1.72 now, well below its 20-day average of 5.03. That is nearly 1.4 standard deviations below the mean, the lowest reading in the dataset. For most of September and into early October, the ratio was running between 7 and 11, pointing to heavy demand for downside protection. The unwinding of that protective positioning marks a sharp change in sentiment among options traders, even as short sellers move in the other direction.

The price context matters here. AIPO closed at $25.36 on October 27, up 3.6% on the day but down 12.1% over the past month. The fund tracks AI and power infrastructure names, a thematic corner of the market that has seen meaningful volatility as rate sensitivity and sector rotation have weighed on energy grid and data centre holdings. The market cap sits near $849 million. There are no earnings events for an ETF, no analyst coverage in the traditional sense, and no valuation multiples to anchor a view.

What to watch next is whether the divergence between short rebuilding and options de-hedging resolves in either direction: a further tightening of availability toward last month's lows would confirm conviction among bears, while any continuation of the put/call ratio decline would signal that call buyers are gaining the upper hand in options markets.