Meet the $625 billion bond king you've probably never heard of

Josh Barrickman is the principal and head of bond indexing in the Americas for Vanguard. He oversees $625 billion in fixed-income assets, the most of any bond manager in the world. Vanguard is known for its passively managed index funds, but investing for the firm is much more active than one would think, Barrickman said. He said there's a role for actively managed bond funds, particularly in niche markets.   NEW YORK CITY — He's the bond king you may have never heard of. Josh...