FILE PHOTO: A sign for BlackRock Inc hangs above their building in New York U.S., July 16, 2018. To match Special Report USA-FUNDS/INDEX REUTERS/Lucas Jackson/File Photo 

A sign for BlackRock Inc hangs above their building in New York U.S., July 16, 2018. REUTERS/Lucas Jackson 

A sign for BlackRock Inc hangs above their building in New York U.S., July 16, 2018. REUTERS/Lucas Jackson 

A sign for BlackRock Inc hangs above their building in New York U.S., July 16, 2018. REUTERS/Lucas Jackson 

A sign for BlackRock Inc hangs above their building in New York U.S., July 16, 2018. REUTERS/Lucas Jackson 

A sign for BlackRock Inc hangs above their building in New York U.S., July 16, 2018. REUTERS/Lucas Jackson 

Laurence Fink, founder and chief executive officer of BlackRock, Inc. speaks during the Reuters Global Investment Outlook Summit in New York, U.S., November 13, 2017. REUTERS/Lucas Jackson 

Laurence Fink, founder and chief executive officer of BlackRock, Inc. speaks during the Reuters Global Investment Outlook Summit in New York, U.S., November 13, 2017. REUTERS/Lucas Jackson 

Laurence Fink, founder and chief executive officer of BlackRock, Inc. speaks during the Reuters Global Investment Outlook Summit in New York, U.S., November 13, 2017. REUTERS/Lucas Jackson 

Laurence Fink, founder and chief executive officer of BlackRock, Inc. speaks during the Reuters Global Investment Outlook Summit in New York, U.S., November 13, 2017. REUTERS/Lucas Jackson 

Laurence Fink, founder and chief executive officer of BlackRock, Inc. speaks during the Reuters Global Investment Outlook Summit in New York, U.S., November 13, 2017. REUTERS/Lucas Jackson 

Laurence Fink, founder and chief executive officer of BlackRock, Inc. speaks during the Reuters Global Investment Outlook Summit in New York, U.S., November 13, 2017. REUTERS/Lucas Jackson 

Laurence Fink, founder and chief executive officer of BlackRock, Inc. speaks during the Reuters Global Investment Outlook Summit in New York, U.S., November 13, 2017. REUTERS/Lucas Jackson 

Laurence Fink, founder and chief executive officer of BlackRock, Inc. speaks during the Reuters Global Investment Outlook Summit in New York, U.S., November 13, 2017. REUTERS/Lucas Jackson 

Laurence Fink, founder and chief executive officer of BlackRock, Inc. speaks during the Reuters Global Investment Outlook Summit in New York, U.S., November 13, 2017. REUTERS/Lucas Jackson 

Laurence Fink, founder and chief executive officer of BlackRock, Inc. speaks during the Reuters Global Investment Outlook Summit in New York, U.S., November 13, 2017. REUTERS/Lucas Jackson 

Laurence Fink, founder and chief executive officer of BlackRock, Inc. speaks during the Reuters Global Investment Outlook Summit in New York, U.S., November 13, 2017. REUTERS/Lucas Jackson 

Laurence D. Fink (L), Chairman and CEO, BlackRock, Inc., and Stephen A. Schwarzman, Chairman, CEO & Co-Founder, Blackstone, attend the Bloomberg Global Business Forum in New York, U.S., September 20, 2017. REUTERS/Brendan McDermid 

Participant Kila Carr-Ince makes her way through the city as approximately 70,000 people from all over the world gathered for the annual Burning Man arts and music festival in the Black Rock Desert of Nevada, U.S. August 30, 2017. REUTERS/Jim Urquhart FOR USE WITH BURNING MAN RELATED REPORTING ONLY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. NO THIRD PARTY SALES. NOT FOR USE BY REUTERS THIRD PARTY DISTRIBUTORS. 

Football Soccer - Olympique Marseille v Paris St Germain - France Cup Final - Stade de France, Saint-Denis, France - 21/05/2016. Owner of Olympique Marseille Margarita Louis Dreyfus and Philipp Hildebrand, Vice Chairman of BlackRock Inc. REUTERS/Benoit Tessier 

Football Soccer - Olympique Marseille v Paris St Germain - France Cup Final - Stade de France, Saint-Denis, France - 21/05/2016. Owner of Olympique Marseille Margarita Louis Dreyfus and Philipp Hildebrand, Vice Chairman of BlackRock Inc. REUTERS/Benoit Tessier 

The BlackRock sign is pictured in the Manhattan borough of New York, in this October 11, 2015 file photo. Global asset manager BlackRock Inc is planning to cut about 400 jobs, or 3 percent of its workforce, as it redirects resources to growth areas, a person familiar with the matter said on March 30, 2016. REUTERS/Eduardo Munoz/Files 

File picture shows owner of Olympique Marseille Margarita Louis Dreyfus and Philipp Hildebrand, Vice Chairman of BlackRock Inc., as they attend Paris St Germain's French Ligue 1 soccer match against Olympique Marseille at the Parc des Princes stadium in Paris November 9, 2014. Margarita Louis-Dreyfus, majority owner and chairwoman of global trading house Louis Dreyfus Commodities , has given birth to twin girls, the company said on Monday. REUTERS/Charles Platiau/File 

Rick Rieder, Managing Director and top bond fund manager for BlackRock Inc., speaks at the Reuters Global Investment Summit in New York, November 17, 2015. REUTERS/Brendan McDermid

Rick Rieder, Managing Director and top bond fund manager for BlackRock Inc., speaks at the Reuters Global Investment Summit in New York, November 17, 2015. REUTERS/Brendan McDermid

Rick Rieder, Managing Director and top bond fund manager for BlackRock Inc., speaks at the Reuters Global Investment Summit in New York, November 17, 2015. REUTERS/Brendan McDermid

Rick Rieder, Managing Director and top bond fund manager for BlackRock Inc., speaks at the Reuters Global Investment Summit in New York. November 17, 2015. REUTERS/Brendan McDermid

Rick Rieder, Managing Director and top bond fund manager for BlackRock Inc., speaks at the Reuters Global Investment Summit in New York, November 17, 2015. REUTERS/Brendan McDermid

Rick Rieder, Managing Director and top bond fund manager for BlackRock Inc., speaks at the Reuters Global Investment Summit in New York, November 17, 2015. REUTERS/Brendan McDermid

Rick Rieder, Managing Director and top bond fund manager for BlackRock Inc., speaks at the Reuters Global Investment Summit in New York, November 17, 2015. REUTERS/Brendan McDermid

A woman walks next to a BlackRock sign pictured in the Manhattan borough of New York, October 11, 2015. REUTERS/Eduardo Munoz 

A man walks next to a BlackRock sign pictured in the Manhattan borough of New York, October 11, 2015. REUTERS/Eduardo Munoz 

The BlackRock sign is pictured in the Manhattan borough of New York, October 11, 2015. REUTERS/Eduardo Munoz 

People walk next to a BlackRock sign pictured in the Manhattan borough of New York, October 11, 2015. REUTERS/Eduardo Munoz 

Former French President Nicolas Sarkozy (L) talks with the owner of Olympique Marseille Margarita Louis Dreyfus and Philipp Hildebrand (R), Vice Chairman of BlackRock Inc. before the French Ligue 1 soccer match between Paris St Germain and Olympique Marseille at the Parc des Princes stadium in Paris, France, October 4, 2015. REUTERS/Regis Duvignau

Rick Rieder, Chief Investment Officer (CIO) of Fundamental Fixed Income at BlackRock Inc. speaks at the Reuters Global Investment Outlook Summit in New York, November 17, 2014. REUTERS/Mike Segar (UNITED STATES - Tags: BUSINESS) 

Rick Rieder, Chief Investment Officer (CIO) of Fundamental Fixed Income at BlackRock Inc. speaks at the Reuters Global Investment Outlook Summit in New York, November 17, 2014. REUTERS/Mike Segar (UNITED STATES - Tags: BUSINESS HEADSHOT) 

Rick Rieder, Chief Investment Officer (CIO) of Fundamental Fixed Income at BlackRock Inc. speaks at the Reuters Global Investment Outlook Summit in New York, November 17, 2014. REUTERS/Mike Segar (UNITED STATES - Tags: BUSINESS) 

Rick Rieder, Chief Investment Officer (CIO) of Fundamental Fixed Income at BlackRock Inc. speaks at the Reuters Global Investment Outlook Summit in New York, November 17, 2014. REUTERS/Mike Segar (UNITED STATES - Tags: BUSINESS) 

Owner of Olympique Marseille Margarita Louis Dreyfus and Philipp Hildebrand, Vice Chairman of BlackRock Inc., attend Paris St Germain's French Ligue 1 soccer match against Olympique Marseille at the Parc des Princes stadium in Paris November 9, 2014. Picture taken November 9, 2014. REUTERS/Charles Platiau (FRANCE - Tags: SPORT SOCCER BUSINESS) 

Owner of Olympique Marseille Margarita Louis Dreyfus and Philipp Hildebrand, Vice Chairman of BlackRock Inc., attend Paris St Germain's French Ligue 1 soccer match against Olympique Marseille at the Parc des Princes stadium in Paris November 9, 2014. Picture taken November 9, 2014. REUTERS/Charles Platiau (FRANCE - Tags: SPORT SOCCER BUSINESS) 

(L-R) Bank of England Governor Mark Carney; Rev. Justin Welby, Archbishop of Canterbury; International Monetary Fund (IMF) Managing Director Christine Lagarde and Philipp Hildebrand, Vice-Chair, BlackRock, Inc; leave after participating in a panel discussion during the IMF-World Bank annual meetings in Washington October 12, 2014. REUTERS/Yuri Gripas (UNITED STATES - Tags: POLITICS BUSINESS) 

Philipp Hildebrand, Vice Chairman of BlackRock Inc. participates in Flagship: The Future of Finance panel discussion during the IMF-World Bank annual meetings in Washington October 12, 2014. REUTERS/Yuri Gripas (UNITED STATES - Tags: POLITICS BUSINESS) 

Philipp Hildebrand, Vice Chairman of BlackRock Inc. participates in Flagship: The Future of Finance panel discussion during the IMF-World Bank annual meetings in Washington October 12, 2014. REUTERS/Yuri Gripas (UNITED STATES - Tags: POLITICS BUSINESS) 

Andrew Swan, Managing Director, Head of Asian Equities of BlackRock, attends an interview as part of Reuters ASEAN Summit in Hong Kong March 26, 2014. BlackRock Inc, the world's biggest money manager, said improving economic indicators in Indonesia and consistent corporate earnings in the Philippines make those two countries prime hunting grounds for Southeast Asian stocks. Picture taken March 26, 2014. REUTERS/Bobby Yip (CHINA - Tags: BUSINESS HEADSHOT) 

Andrew Swan, Managing Director, Head of Asian Equities of BlackRock, poses during an interview as part of Reuters ASEAN Summit in Hong Kong March 26, 2014. BlackRock Inc, the world's biggest money manager, said improving economic indicators in Indonesia and consistent corporate earnings in the Philippines make those two countries prime hunting grounds for Southeast Asian stocks. Picture taken March 26, 2014. REUTERS/Bobby Yip (CHINA - Tags: BUSINESS HEADSHOT) 

Andrew Swan, Managing Director, Head of Asian Equities of BlackRock, poses during an interview as part of Reuters ASEAN Summit in Hong Kong March 26, 2014. BlackRock Inc, the world's biggest money manager, said improving economic indicators in Indonesia and consistent corporate earnings in the Philippines make those two countries prime hunting grounds for Southeast Asian stocks. Picture taken March 26, 2014. REUTERS/Bobby Yip (CHINA - Tags: BUSINESS) 

A screen displays the trading price for Bank of America and Black Rock stocks on the floor of the New York Stock Exchange, January 17, 2013. Bank of America's fourth-quarter profit fell as it took more charges to clean up mortgage-related problems. While BlackRock Inc, the world's largest money manager, said on Thursday its fourth-quarter profit rose 24 percent, bolstered by increased investor confidence in global stock markets. REUTERS/Brendan McDermid (UNITED STATES - Tags: BUSINESS) 

Robert Kapito, president of BlackRock Inc., gives thumbs up after ringing the opening bell with employees at the New York Stock Exchange, July 10, 2012. REUTERS/Brendan McDermid (UNITED STATES - Tags: BUSINESS) 

Robert Kapito (C), president of BlackRock Inc., rings the opening bell with employees at the New York Stock Exchange, July 10, 2012. REUTERS/Brendan McDermid (UNITED STATES - Tags: BUSINESS) 

Robert Kapito, president of BlackRock Inc., gives a thumbs up after ringing the opening bell with employees at the New York Stock Exchange, July 10, 2012. REUTERS/Brendan McDermid (UNITED STATES - Tags: BUSINESS) 

Peter R. Fisher, Senior Managing Director and Head of Fixed Income Portfolio Management at BlackRock, Inc., speaks at the Council on Foreign Relations World Economic Update in New York City, March 16, 2011. REUTERS/Mike Segar (UNITED STATES - Tags: BUSINESS) 

Peter R. Fisher, Senior Managing Director and Head of Fixed Income Portfolio Management at BlackRock, Inc. speaks at the Council on Foreign Relations World Economic Update in New York City, March 16, 2011. REUTERS/Mike Segar (UNITED STATES - Tags: BUSINESS HEADSHOT) 

A BlackRock building is seen in New York June 12, 2009. BlackRock has agreed to buy Barclays Global Investors to create the world's biggest asset manager, BlackRock Global Investors, in a $13.5 billion deal that British bank Barclays hopes will put to rest concerns about its capital. REUTERS/Eric Thayer (UNITED STATES BUSINESS) 

Television network CBS Inc. accepted a $5.4 billion, $81-a-share buyout offer from Westinghouse Electric Copr., Westinghousesaid August 1. The headquarters of CBS, nicknamed "Black Rock," in Manhattan are shown in this August 1 photo. 

Television network CBS Inc., accepted a $5.4 billion, $81-a-share buyout offer from Westinghouse Electric Corp., Westinghouse said August 1. A woman enters CBS headquarters, nicknamed "Black Rock," in Manhattan August 1.