Climate Changed

U.S. Solar Companies Are Having Their Best Day in Weeks

  • Theories vary, including tariff exemptions and panel pricing
  • Or perhaps it was Canadian Solar’s strong revenue forecast

Photographer: David Paul Morris/Bloomberg

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U.S. solar stocks enjoyed their best day in almost a month, with the rooftop installer Vivint Solar Inc. climbing the most since June.

Exactly what’s behind Tuesday’s rally is debatable. Here are some possibilities: