News release

Long-Tenured Principal in Equity Index Group Retires

Vanguard Names New Head of U.S. Trading

VALLEY FORGE, PA (October 15, 2020)—Vanguard today announced that Michael Buek, a long-tenured principal in Vanguard Equity Index Group and head of U.S. trading, will retire at the end of December 2020, after 33 years with the firm. The firm also announced that Andrew Maack, who currently serves as the global head of Foreign Exchange (FX) Trading, will lead the firm’s index portfolio management and trading functions for the U.S. trading desk upon Mr. Buek’s retirement.

“Mike was a pioneer in the development of Vanguard’s equity index management function and has been instrumental in leading our equity trading desk through critical inflection points over the past three decades. We are deeply grateful to Mike for his dedication and unwavering commitment to our clients, crew and Vanguard,” said Vanguard Chief Investment Officer Greg Davis. “Andy’s creation and leadership of Vanguard’s foreign exchange trading desk, along with his equity portfolio experience, make him extremely well-suited to lead Vanguard’s U.S. Trading team.  I’m confident the team will be in good hands under his leadership.”

During his tenure at Vanguard, Mr. Buek was instrumental in developing the deep and talented team of portfolio managers who oversee the firm’s equity index funds. His experience and expertise were also a driving force behind crucial market structure changes that improved investor outcomes.

Mr. Buek joined Vanguard in 1987 and joined the equity trading desk in 1991. He was integral in the management of the Vanguard S&P 500 Index Fund from 1991 to 2016 before assuming the position of head of U.S. trading in 2016.

Mr. Maack joined Vanguard in 2002 and has worked in the Vanguard Investment Management Group since 2004.  Mr. Maack founded Vanguard’s FX desk and, since that time, has built the firm’s currency trading capabilities into an industry-leading team known for executing high trading volumes at a very low cost.  Prior to his current role, he served as an equity portfolio manager, a municipal bond trader and held several roles in the Retail Investor Group. He will report to Rodney Comegys, principal and global head of Vanguard Equity Investment Group.

Today Vanguard Equity Index Group is one of the world’s largest equity index portfolio managers in the world, managing more than $3.9 trillion in assets across the globe. The group draws on the deep expertise and diverse perspectives of its global team, which enables Vanguard to deliver precise tracking to its benchmarks and exercise prudent risk management and competitive investment performance for over 30 million clients. The portfolio managers within the equity indexing team have an average tenure of 13 years at Vanguard and more than 17 years of total investment management experience.



About Vanguard

Vanguard is one of the world’s largest investment management companies. As of August 31, 2020, Vanguard managed $6.6 trillion in global assets. The firm, headquartered in Valley Forge, Pennsylvania, offers more than 422 funds to its more than 30 million investors worldwide. For more information, visit

Asset figures as of August 31, 2020 unless otherwise noted.

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