ETF Trends’ Lara Crigger highlights 2021’s ESG ETF success stories and explains how the definition of ESG is evolving.  BlackRock’s Laura Segafredo and MSCI’s Sarah Greenberg discuss ESG considerations in investor portfolios, with a particular focus on climate change.  Roundhill’s Will Hershey offers a unique perspective on ETF ticker symbols and the importance of social media in the ETF business.