Bloomberg Radio host Barry Ritholtz speaks to Mark Wiedman, senior managing director, head of the global client business and member of the global executive committee of BlackRock. He joined the firm in 2004 to help start the Financial Markets Advisory business. Mark led BlackRock's 2008 creation of PennyMac, now the No. 2 US mortgage bank, and served on its public board from 2013 to 2019. He previously served as senior adviser to the undersecretary for domestic finance at the US Treasury and a consultant at McKinsey & Co. He serves on the boards of the National Committee for US-China Relations and Focusing Capital on the Long Term.