02:35 PM EDT, 08/15/2025 (MT Newswires) -- The Treasury Department and the IRS on Friday generally nixed prior guidance on what is considered beginning construction for clean energy projects attempting to earn tax credits.

Shares of SunRun ( RUN ) were up 38% in recent afternoon trading. Shares of First Solar ( FSLR ) , Canadian Solar ( CSIQ ) and Array (ARRY) were up around 13%, 11% and 26%, respectively.

Price: 14.57, Change: +4.09, Percent Change: +38.98