Britain's Chancellor of the Exchequer Philip Hammond and Russell Galley, Managing Director, Halifax Bank, Lloyds Banking Group attend a meeting of regional leaders of the financial and professional services in Halifax, Britain, May 17, 2018. REUTERS/Craig Brough 

Britain's Chancellor of the Exchequer Philip Hammond attends a meeting of regional leaders of the financial and professional services in Halifax, Britain, May 17, 2018. REUTERS/Craig Brough 

Britain's Chancellor of the Exchequer Philip Hammond attends a meeting of regional leaders of the financial and professional services in Halifax, Britain, May 17, 2018. REUTERS/Craig Brough 

The logo of KPMG, a professional service company, is seen at the company's head offices at La Defense business and financial district in Courbevoie near Paris, France. May 16, 2018. REUTERS/Charles Platiau 

The logo of French insurance company MACSF, for health care professionals, is seen on the company tower at La Defense business and financial district in Courbevoie, near Paris, France. May 16, 2018. REUTERS/Charles Platiau 

A Seamaster Professional Co-Axial Chronometer 300m/1000ft watch of Swiss manufacturer Omega is displayed at the Baselworld watch and jewellery fair in Basel, Switzerland March 22, 2018. REUTERS/Arnd Wiegmann 

A Seamaster Professional Co-Axial Chronometer 300m/1000ft watch of Swiss manufacturer Omega is displayed at the Baselworld watch and jewellery fair in Basel, Switzerland March 22, 2018. REUTERS/Arnd Wiegmann 

Professional embroiderers demonstrate the jeans customisation service inside the new John Lewis store at the Westfield shopping centre in White City, London, Britain, March 19, 2018. REUTERS/Henry Nicholls 

The final numbers of the day are shown above the floor of the New York Stock Exchange in New York, U.S., February 5, 2018. REUTERS/Brendan McDermid 

A general view of the drive across the Ambassador Bridge to Canada from Detroit, Michigan, U.S. January 14, 2018. REUTERS/Jonathan Ernst 

Professional bull rider J. B. Mauney rings the opening bell of the New York Stock Exchange in New York, U.S., January 5, 2018. REUTERS/Lucas Jackson 

Professional bull rider J. B. Mauney rings the opening bell of the New York Stock Exchange in New York, U.S., January 5, 2018. REUTERS/Lucas Jackson 

Professional bull rider J. B. Mauney walks on the floor of the New York Stock Exchange shortly after the opening bell in New York, U.S., January 5, 2018. REUTERS/Lucas Jackson 

A waiter carries a tray with drinks at the terrace of a restaurant in downtown Malaga, southern Spain January 3, 2018. REUTERS/Jon Nazca 

A man walks inside the mall of a commercial tower at the financial Central district in Hong Kong, China November 23, 2017. REUTERS/Bobby Yip 

An investor looks at an electronic board showing stock information at a brokerage house in Beijing, China, June 24, 2016. REUTERS/Jason Lee 

Vehicles ply inside the Chenani-Nashri Tunnel, Asia's longest bi-directional tunnel, on the Jammu-Srinagar National Highway at Chenani, northeast of Jammu April 3, 2017. REUTERS/Mukesh Gupta 

Pedestrians cast shadows as they make their way at a financial district in Tokyo, Japan, January 26, 2017. Picture taken on January 26, 2017. REUTERS/Kim Kyung-Hoon 

A man makes his way at a convention centre in a financial district in Tokyo, Japan, January 26, 2017. Picture taken on January 26, 2017. REUTERS/Kim Kyung-Hoon TPX IMAGES OF THE DAY 

A stock broker gestures as he monitors market prices on a computer in a booth, during trading session at the Pakistan Stock Exchange (PSE), in Karachi, Pakistan January 24, 2017. REUTERS/Akhtar Soomro 

Commuters ride a bus over Westminster Bridge during a strike on the Underground by members of two unions in protest at ticket office closures and reduced staffing levels, in London, Britain January 9, 2017. REUTERS/Toby Melville TPX IMAGES OF THE DAY

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 

Bank of Canada Governor Stephen Poloz arrives at a news conference upon the release of the Financial System Review in Ottawa, Ontario, Canada, December 15, 2016. REUTERS/Chris Wattie 

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 

Employees work on the production line of Kent bicycles at Shanghai General Sports Co., Ltd, in Kunshan, Jiangsu Province, China, February 22, 2019. Picture taken February 22, 2019. REUTERS/Aly Song 

Bank of Canada Governor Stephen Poloz arrives at a news conference upon the release of the Financial System Review in Ottawa, Ontario, Canada, December 15, 2016. REUTERS/Chris Wattie 

Bank of Canada Governor Stephen Poloz speaks during a news conference upon the release of the Financial System Review in Ottawa, Ontario, Canada, December 15, 2016. REUTERS/Chris Wattie 

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 

Richard Ridinger, CEO of Lonza, (C) talks with journalists after a news conference on the acquisition of Capsugel in Basel, Switzerland, December 15, 2016. REUTERS/Arnd Wiegmann

Richard Ridinger, CEO of Lonza, leaves after a news conference on the acquisition of Capsugel in Basel, Switzerland, December 15, 2016. REUTERS/Arnd Wiegmann

Richard Ridinger, CEO of Lonza, attends a news conference on the acquisition of Capsugel in Basel, Switzerland, December 15, 2016. REUTERS/Arnd Wiegmann

Richard Ridinger, CEO of Lonza, attends a news conference on the acquisition of Capsugel in Basel, Switzerland, December 15, 2016. REUTERS/Arnd Wiegmann 

Richard Ridinger, CEO of Lonza, attends a news conference on the acquisition of Capsugel in Basel, Switzerland, December 15, 2016. REUTERS/Arnd Wiegmann

Richard Ridinger, CEO of Lonza, attends a news conference on the acquisition of Capsugel in Basel, Switzerland, December 15, 2016. REUTERS/Arnd Wiegmann 

Richard Ridinger, CEO of Lonza, attends a news conference on the acquisition of Capsugel in Basel, Switzerland, December 15, 2016. REUTERS/Arnd Wiegmann 

Richard Ridinger, CEO of Lonza, attends a news conference on the acquisition of Capsugel in Basel, Switzerland, December 15, 2016. REUTERS/Arnd Wiegmann 

Bakers work inside their shop on a cold winter morning in Srinagar, December 15, 2016. REUTERS/Danish Ismail 

Federal Reserve Chair Janet Yellen holds a news conference following day two of the Federal Open Market Committee (FOMC) meeting in Washington, U.S., December 14, 2016. REUTERS/Gary Cameron TPX IMAGES OF THE DAY 

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 

U.S. Federal Reserve Chair Janet Yellen concludes her news conference following day two of the Federal Open Market Committee (FOMC) meeting in Washington, U.S., December 14, 2016. REUTERS/Gary Cameron

U.S. Federal Reserve Chair Janet Yellen concludes her news conference following day two of the Federal Open Market Committee (FOMC) meeting in Washington, U.S., December 14, 2016. REUTERS/Gary Cameron

U.S. Federal Reserve Chair Janet Yellen holds a news conference following day two of the Federal Open Market Committee (FOMC) meeting in Washington, U.S., December 14, 2016. REUTERS/Gary Cameron

U.S. Federal Reserve Chair Janet Yellen addresses a news conference following day two of the Federal Open Market Committee (FOMC) meeting in Washington, U.S., December 14, 2016. REUTERS/Gary Cameron

U.S. Federal Reserve Chair Janet Yellen holds a news conference following day two of the Federal Open Market Committee (FOMC) meeting in Washington, U.S., December 14, 2016. REUTERS/Gary Cameron

U.S. Federal Reserve Chair Janet Yellen holds a news conference following day two of the Federal Open Market Committee (FOMC) meeting in Washington, U.S., December 14, 2016. REUTERS/Gary Cameron

Federal Reserve Chair Janet Yellen holds a news conference following day two of the Federal Open Market Committee (FOMC) meeting in Washington, U.S., December 14, 2016. REUTERS/Gary Cameron

Federal Reserve Chair Janet Yellen holds a news conference following day two of the Federal Open Market Committee (FOMC) meeting in Washington, U.S., December 14, 2016. REUTERS/Gary Cameron

U.S. Federal Reserve Chair Janet Yellen holds a news conference following day two of the Federal Open Market Committee (FOMC) meeting in Washington, U.S., December 14, 2016. REUTERS/Gary Cameron

Federal Reserve Chair Janet Yellen addresses a news conference following day two of the Federal Open Market Committee (FOMC) meeting in Washington, U.S., December 14, 2016. REUTERS/Gary Cameron

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