A stockbroker and her family watch a terminal during a special "muhurat" trading session for Diwali, the Hindu festival of lights, at the Bombay Stock Exchange (BSE) in Mumbai, India, October 27, 2019. REUTERS/Francis Mascarenhas

A stockbroker and his daughter watch a terminal during a special "muhurat" trading session for Diwali, the Hindu festival of lights, at the Bombay Stock Exchange (BSE) in Mumbai, India, October 27, 2019. REUTERS/Francis Mascarenhas

A stockbroker trader reacts as his family watches him trading during a special "muhurat" trading session for Diwali, the Hindu festival of lights, at the Bombay Stock Exchange (BSE) in Mumbai, India, November 7, 2018. REUTERS/Francis Mascarenhas

A stockbroker trader and his family watch a terminal during a special "muhurat" trading session for Diwali, the Hindu festival of lights, at the Bombay Stock Exchange (BSE) in Mumbai, India, November 7, 2018. REUTERS/Francis Mascarenhas

Bollywood actress Neetu Chandra along with stockbroker traders pose as they hit the ceremonial gong to start a special "muhurat" trading session for Diwali, the Hindu festival of lights, at the Bombay Stock Exchange (BSE) in Mumbai, India, November 7, 2018. REUTERS/Francis Mascarenhas

An investor watches a board showing stock information at a brokerage office in Beijing, China October 8, 2018. REUTERS/Jason Lee

A stockbroker trader reacts as his family watches him trading during a special "muhurat" trading session for Diwali, the Hindu festival of lights, at the Bombay Stock Exchange (BSE) in Mumbai, India October 19, 2017. REUTERS/Shailesh Andrade

Traders work at their desks in front of the German share price index, DAX board, at the stock exchange in Frankfurt, Germany, December 27, 2016. REUTERS/Staff/Remote

Traders work at their desks in front of the German share price index, DAX board, at the stock exchange in Frankfurt, Germany, December 22, 2016. REUTERS/Staff/Remote

Trader Peter Tuchman works on the floor at the New York Stock Exchange (NYSE) in Manhattan, New York City, U.S., December 21, 2016. REUTERS/Andrew Kelly TPX IMAGES OF THE DAY

Trader Peter Tuchman works on the floor at the New York Stock Exchange (NYSE) in Manhattan, New York City, U.S., December 21, 2016. REUTERS/Andrew Kelly

Traders work on the floor at the New York Stock Exchange (NYSE) in Manhattan, New York City, U.S., December 21, 2016. REUTERS/Andrew Kelly

Trader Peter Tuchman works on the floor at the New York Stock Exchange (NYSE) in Manhattan, New York City, U.S., December 21, 2016. REUTERS/Andrew Kelly

A trader works on the floor at the New York Stock Exchange (NYSE) in Manhattan, New York City, U.S., December 21, 2016. REUTERS/Andrew Kelly

A trader works on the floor at the New York Stock Exchange (NYSE) in Manhattan, New York City, U.S., December 21, 2016. REUTERS/Andrew Kelly

Traders work at their desks in front of the German share price index, DAX board, at the stock exchange in Frankfurt, Germany, December 21, 2016. REUTERS/Staff/Remote

Traders work at their desks in front of the German share price index, DAX board, at the stock exchange in Frankfurt, Germany, December 20, 2016. REUTERS/Staff/Remote

Traders work at their desks in front of the German share price index, DAX board, at the stock exchange in Frankfurt, Germany, December 15, 2016. REUTERS/Staff/Remote

Traders works on the floor of the New York Stock Exchange (NYSE) as a television screen displays coverage of U.S. Federal Reserve Chairman Janet Yellen shortly after the announcement that the U.S. Federal Reserve will hike interest rates, in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson TPX IMAGES OF THE DAY

A trader works on the floor of the New York Stock Exchange (NYSE) as a television screen displays coverage of U.S. Federal Reserve Chairman Janet Yellen shortly after the announcement that the U.S. Federal Reserve will hike interest rates, in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

A trader works on the floor of the New York Stock Exchange (NYSE) as a television screen displays coverage of U.S. Federal Reserve Chairman Janet Yellen shortly after the announcement that the U.S. Federal Reserve will hike interest rates, in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

A trader works on the floor of the New York Stock Exchange (NYSE) as a television screen displays coverage of U.S. Federal Reserve Chairman Janet Yellen shortly after the announcement that the U.S. Federal Reserve will hike interest rates, in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

A trader works on the floor of the New York Stock Exchange (NYSE) as a television screen displays coverage of U.S. Federal Reserve Chairman Janet Yellen shortly after the announcement that the U.S. Federal Reserve will hike interest rates, in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

Traders works on the floor of the New York Stock Exchange (NYSE) as a television screen displays coverage of U.S. Federal Reserve Chairman Janet Yellen shortly after the announcement that the U.S. Federal Reserve will hike interest rates, in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

A trader works on the floor of the New York Stock Exchange (NYSE) as a television screen displays coverage of U.S. Federal Reserve Chairman Janet Yellen shortly after the announcement that the U.S. Federal Reserve will hike interest rates in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

A trader works on the floor of the New York Stock Exchange (NYSE) as a television screen displays coverage of U.S. Federal Reserve Chairman Janet Yellen shortly after the announcement that the U.S. Federal Reserve will hike interest rates, in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

A trader works on the floor of the New York Stock Exchange (NYSE) as a television screen displays coverage of U.S. Federal Reserve Chairman Janet Yellen shortly after the announcement that the U.S. Federal Reserve will hike interest rates in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

Traders work on the floor of the New York Stock Exchange (NYSE) shortly after the announcement that the U.S. Federal Reserve will hike interest rates in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

A trader works on the floor of the New York Stock Exchange (NYSE) shortly after the announcement that the U.S. Federal Reserve will hike interest rates in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

Traders work on the floor of the New York Stock Exchange (NYSE) shortly after the announcement that the U.S. Federal Reserve will hike interest rates in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

A trader works on the floor of the New York Stock Exchange (NYSE) shortly after the announcement that the U.S. Federal Reserve will hike interest rates in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson TPX IMAGES OF THE DAY

Traders work on the floor of the New York Stock Exchange (NYSE) as a television screen shows news of the announcement that the U.S. Federal Reserve will hike interest rates in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

Traders work on the floor of the New York Stock Exchange (NYSE) as a television screen shows news of the announcement that the U.S. Federal Reserve will hike interest rates in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

Traders work on the floor of the New York Stock Exchange (NYSE) as a television screen shows news of the announcement that the U.S. Federal Reserve will hike interest rates in New York, U.S., December 14, 2016. REUTERS/Lucas Jackson

Traders work at their desks in front of the German share price index, DAX board, at the stock exchange in Frankfurt, Germany, December 14, 2016. REUTERS/Staff/Remote

Traders work on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 14, 2016. REUTERS/Lucas Jackson

Traders work on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 14, 2016. REUTERS/Lucas Jackson

A trader gestures as he works on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 14, 2016. REUTERS/Lucas Jackson

A trader smiles as he works on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 14, 2016. REUTERS/Lucas Jackson

Traders work on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 14, 2016. REUTERS/Lucas Jackson

Traders work on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 14, 2016. REUTERS/Lucas Jackson

Traders work on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 14, 2016. REUTERS/Lucas Jackson

Traders work on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 14, 2016. REUTERS/Lucas Jackson

Traders work on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 14, 2016. REUTERS/Lucas Jackson

A trader wears a hat referencing the proximity of Dow Jones Industrial Average to 20,000 as he works on floor of the New York Stock Exchange (NYSE) shortly before the close of trading in New York, U.S., December 13, 2016. REUTERS/Lucas Jackson

Traders work on floor of the New York Stock Exchange (NYSE) shortly before the close of trading in New York, U.S., December 13, 2016. REUTERS/Lucas Jackson

Traders work on floor of the New York Stock Exchange (NYSE) shortly before the close of trading in New York, U.S., December 13, 2016. REUTERS/Lucas Jackson

Traders work on floor of the New York Stock Exchange (NYSE) shortly before the close of trading in New York, U.S., December 13, 2016. REUTERS/Lucas Jackson

The final value of the Dow Jones Industrial Average is displayed on a screen above the floor of the New York Stock Exchange (NYSE) shortly before the closing bell in New York, U.S., December 13, 2016. REUTERS/Lucas Jackson TPX IMAGES OF THE DAY

A trader watches his screen on floor of the New York Stock Exchange (NYSE) shortly before the close of trading in New York, U.S., December 13, 2016. REUTERS/Lucas Jackson

A trader watches his screen on the floor of the New York Stock Exchange (NYSE) shortly before the close of trading in New York, U.S., December 13, 2016. REUTERS/Lucas Jackson

Traders work on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 13, 2016. REUTERS/Lucas Jackson

Traders work on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 13, 2016. REUTERS/Lucas Jackson

Traders work on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 13, 2016. REUTERS/Lucas Jackson

A trader for Goldman Sachs works on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 13, 2016. REUTERS/Lucas Jackson

A trader works on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 13, 2016. REUTERS/Lucas Jackson

A trader works on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 13, 2016. REUTERS/Lucas Jackson

Traders laugh as they work on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 13, 2016. REUTERS/Lucas Jackson

Traders laugh as they work on the floor of the New York Stock Exchange (NYSE) shortly after the opening bell in New York, NY, U.S. December 13, 2016. REUTERS/Lucas Jackson

Traders work at their desks in front of the German share price index, DAX board, at the Stock Exchange in Frankfurt, Germany December 13, 2016. REUTERS/Staff/Remote