On Wall Street, the investment giant BlackRock was forced to deny Wednesday that it’s taking bold action on climate change, after the activist group The Yes Men sent reporters a hoax letter posing as BlackRock CEO Larry Fink. The letter claimed BlackRock would require companies it invests in to align their business models with the goals of the Paris climate agreement. After the Financial Times, CNBC and other media outlets ran with the story, BlackRock tweeted, “Don’t be fooled by imitations…Larry’s real CEO letter coming soon.” As the world’s largest investment company, BlackRock is also the world’s largest owner of fossil fuel companies and has been the target of environmentalists and shareholder activists calling on it to divest from coal, oil and gas.