Buoyed by expectations of new U.S. tariff policies and rising demand for clean energy, solar stocks have recently staged a strong breakout. The UBS solar basket index, UBXXSOL, has surged 33% this month, with a cumulative year-to-date gain of 40%, technically breaking a downtrend that had persisted for over five years.
UBS analyst Kathleen Gordon attributes this rally to declining yields and a reignition of policy momentum. Market focus is centered on the anticipated "Section 232" tariff decision expected in mid-to-late June, with potential duties targeting polysilicon imports. First Solar has emerged as the leading stock in this surge. On Thursday, First Solar's stock price closed up 10.8%, having touched an intraday high of $310.42, an 18-year peak, marking its sixth consecutive day of gains.
Gordon notes that current policy expectations include setting a minimum import price alongside potential tariffs, and that domestic manufacturing investments could be used to offset tariff obligations. She describes the market as being in a "buy the rumor, buy the news" mode, with momentum building as the policy decision approaches.
Bullish sentiment is also reflected in institutional rating adjustments. GLJ Research analyst Gordon Johnson upgraded First Solar from "Hold" to "Buy," setting a price target of $315. He believes the company's cancellation risk has significantly decreased, and the pending Section 232 tariff ruling is an upcoming positive catalyst. Roth Capital similarly stated that Section 232 is likely to be a "positive catalyst" for First Solar, emphasizing that the company's cadmium telluride (CdTe) thin-film technology completely insulates it from the silicon-based solar product trade war, constituting a unique competitive advantage.
Beyond policy variables, energy security and data center demand are further solidifying the sector's fundamental logic. BloombergNEF analyst Rob Barnett stated that conflicts in the Middle East are reinforcing the market's view of solar, storage, and wind as rapidly deployable domestic energy sources, with customers currently prioritizing cost visibility, supply resilience, and low exposure to natural gas price volatility. Concurrently, utility-scale solar demand from data centers continues to expand, with an estimated 183 gigawatts of new capacity expected in the U.S. between 2026 and 2030.
Within the sector's subsectors, utility-scale solar demand remains resilient despite high pricing volatility, and Gordon indicated that NextEra Energy is still viewed by institutions as a core holding. In contrast, while the residential solar segment experienced a sharp, short-squeeze-driven rally following Enphase Energy's announcement of solid-state transformer technology, lifting stocks like SolarEdge, Gordon cautioned that this technology is not a differentiating breakthrough, as giants like Schneider Electric and ABB already have similar offerings. The rebound in the residential solar space may therefore face a pullback risk. Goldman Sachs analyst Brian Lee also emphasized in an earlier report that the residential segment remains challenging, albeit with healthier channel inventory.
Looking ahead, Gordon believes that beyond the specifics of the Section 232 tariff implementation, First Solar's commentary regarding its order book during the upcoming Q2 earnings call will be the next key catalyst.
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