Sustainable finance is rife with greenwash. Time for more disclosure

INVESTORS ARE all too familiar with the rise of Tesla. Shares in the electric-vehicle maker are now worth nearly nine times what they were at the start of 2019. But it is not an exception. As political leaders across the world start to send clearer signals about their willingness to tackle climate change, the private sector is getting enthused, too, and a green boom is under way.Over 40 green firms have seen their share prices triple since the start of 2019. Six have outperformed Tesla. The beneficiaries include all manner of emission-sparing companies, from solar-panel firms to makers of hydrogen fuel cells.