Plug Power sinks 45% from 2026 high as short interest hits 27.4%

Plug Power shares have lost nearly half their value from the 2026 peak, with short sellers controlling more than a quarter of the float as the hydrogen company's turnaround story faces its toughest test.

Plug Power shares fell to their lowest since April 2, extending a 45% decline from the 2026 high of $108.71, as short interest climbed to 27.4% of the float. The stock slipped below its 200-day moving average, a technical level watched by momentum traders.

The sell-off accelerated on July 8 after Iran's missile attack on commercial tankers near the Strait of Hormuz pushed oil prices higher and revived inflation fears, compounding pressure on clean energy names. Plug Power fell alongside Enphase Energy and other renewable stocks as Brent crude rose toward $75 a barrel. The broader Industrial Select Sector SPDR dropped about 2%, but clean energy names saw steeper declines of 7% to 9%.

The elevated short interest — nearly triple the average for US-listed stocks — reflects persistent skepticism about Plug Power's path to profitability. The company has been executing a turnaround plan centered on scaling its green hydrogen production network, including electrolyzer deployments and hydrogen liquefaction facilities. In 2025, it opened multiple production sites under the Inflation Reduction Act's Section 45V tax credit, which provides up to $3 per kilogram in credits for green hydrogen.

The Hydrogen Math

Plug Power's capital expenditure has surged as it builds out hydrogen production infrastructure. The company has invested heavily in electrolyzer manufacturing capacity and hydrogen liquefaction plants across North America, aiming to lower its cost of production to compete with gray hydrogen derived from natural gas. The IRA's 45V credit is central to that equation — without it, green hydrogen costs roughly $5 to $7 per kilogram versus $1 to $2 for gray hydrogen.

The challenge is timing. Analysts expect Plug Power to grow earnings per share from $3.26 in 2026 to $4.70 by 2030, a 44% increase, according to consensus estimates. But the company has yet to post sustained profitability, leaving it vulnerable to the high cost of debt as the Federal Reserve maintains a hawkish stance. New Fed Chair Kevin Warsh's June FOMC stripped the easing bias, with nine of 18 officials penciling in a 2026 rate hike, pushing the 10-year Treasury yield to roughly 4.47%.

What's at Stake for Investors

For Plug Power, the high short interest creates a double-edged setup. If the company delivers on its turnaround — achieving positive free cash flow and demonstrating that its hydrogen production network can operate at scale — the 27.4% short interest could fuel a short squeeze. If it stumbles, further declines could trigger margin calls and accelerate selling pressure.

The stock's decline to current levels has brought its valuation closer to historical norms. At its September 2025 all-time high of $108.71, Plug Power traded at a forward price-to-earnings multiple of 34.6 times. That multiple has contracted significantly as the shares have fallen, though the company's capital-intensive business model means investors are still paying for future earnings that have not yet materialized.

Plug Power competes with Ballard Power Systems and Nel ASA in the hydrogen fuel cell space, as well as with broader clean energy names like Bloom Energy. The sector as a whole faces headwinds from higher interest rates, which raise the cost of financing capital-intensive hydrogen projects, and from geopolitical uncertainty that has pushed energy investors toward traditional oil and gas.

This article is for informational purposes only and does not constitute investment advice.