Pinnacle West Capital heads into the second half of 2026 with a curious split: the stock is up 7% over the past month and trading near its highest levels in years, yet short sellers have been quietly rebuilding positions at a pace that stands out even for a regulated utility.
Short interest has climbed 45% over the past month to 8% of the free float — roughly 9.6 million shares. That is the most notable feature of this week's setup. The build has been steady rather than sudden: positions were running near 6.6 million shares in late May before stepping up sharply around June 8-9, and then again through late June. Despite the volume of shorts, the borrow market is not under any stress. Availability is sitting at around 278% — meaning there are almost three shares available to borrow for every one already lent out. Cost to borrow has actually fallen 26% on the week to just 0.40%. The lending market is loose; the short build is not being driven by a scramble for scarce stock.
Options positioning supports a broadly constructive read on the stock. The put/call ratio is running at 0.29, well below its 20-day average of 0.40 and near the lower end of its 52-week range of 0.11 to 0.77. That means call volume is dominating the options market — options traders are leaning bullish, which sits in direct contrast to the short sellers who have been accumulating on the way up. The ORTEX short score is elevated at 62.7, up from 56.5 in mid-June, reflecting the recent SI build, but the score itself is not at extreme levels.
The Street has nudged cautiously higher. Barclays raised its target to $108 from $102 on July 1 while maintaining an Equal-Weight rating — a constructive but uncommitted update from a bellwether firm. The mean analyst target sits at $105.71, fractionally below the current price of $107.00, which tells you most of the sector is already pricing in the recent re-rating. The bull case rests on 5.2% retail sales growth, a 2.4% customer base expansion, and the data centre load growth story running through the Phoenix metro. Bears point to a roughly 10% year-on-year earnings decline driven by rising operating costs, a negative EPS bias for 2026 and 2027, and the Arizona rate case procedural schedule hanging over forward estimates. The PE multiple has drifted up to around 20.6x, and the EV/EBITDA is near 12x — not stretched for the sector, but not cheap either. The dividend score ranks in the 96th percentile, which anchors the income buyer base.
The nearest earnings print is August 3. Recent history is not encouraging for near-term bulls: the May 2026 result produced a 0.7% one-day decline followed by a modest 2.8% five-day recovery, while the prior print fell 2.2% on the day and a further 3.7% over five days. The pattern has been small negative reactions rather than any sharp move in either direction. Close peers LNT and AEP both added about 2.3% on the week versus PNW's 2.8%, while DUK lagged at 1.2% — PNW is holding a modest performance edge over the group but the utilities complex is broadly firm.
The key tension to watch heading into August is whether the short build that accelerated through June reflects a genuine view on the Arizona rate case outcome, or simply a mechanical hedge against a stock that has run 7% in a month — and whether the August 3 earnings call gives either camp reason to move.
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