If 2014 was the year when the yieldco “phenomenon” came to dominate conversations across the renewables industry, then 2015 has been the year when the yieldco model was put through the wringer.

Most yieldcos have seen their share prices fall dramatically over the past six months, including Pattern Energy (down 24%), NextEra Energy Partners (down 40%), NRG Yield (down 44%), and SunEdison’s TerraForm Power (down 53%).

Some