Touted as a breakthrough in renewables finance, giving investors the chance to buy into companies whose primary business is generating wind and solar power, US-listed yieldcos sailed into 2015 on a wave of optimism. To many that optimism now looks like hype.

As Recharge went to press, nearly all yieldcos that have gone public on US markets since 2013 were worth less than they were at their initial public offerings (IPO).