Brownstone Investment Group, a fixed income investment firm, brought aboard former Morgan Stanley fixed income trader Matthew Martines as managing director to expand its municipal bond trading and electronic market-making units.

Martines arrives from Morgan Stanley, where he spent more than 15 years in various leadership roles within fixed income trading and electronic market making, including municipal technology and sales, said Jon Sablowsky, head of trading at Brownstone. Martines will be based in New York and a new office set to open in the suburbs that will focus on institutional accounts and trading smaller trading increments, Sablowsky said.

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