The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, August 5, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the Frankfurt Stock Exchange, Germany August 4, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, August 3, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 30, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 29, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 27, 2021. REUTERS/Staff

Mondelez International logo and stock graph are seen displayed in this illustration picture taken July 26, 2021. Picture taken July 26, 2021. REUTERS/Dado Ruvic/Illustration

ShareChat and stock graph are displayed in this illustration taken, July 26, 2021. REUTERS/Dado Ruvic/Illustration

Microsoft logo is seen on the smartphone in front of displayed stock graph in this illustration taken, July 26, 2021. REUTERS/Dado Ruvic/Illustration

Microsoft logo is seen on the smartphone in front of displayed stock graph in this illustration taken, July 26, 2021. REUTERS/Dado Ruvic/Illustration

Microsoft logo is seen on the smartphone in front of displayed stock graph in this illustration taken, July 26, 2021. REUTERS/Dado Ruvic/Illustration

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 26, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 23, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 22, 2021. Picture taken July 22, 2021. REUTERS/Staff

A 3D-printed Microsoft logo is seen in front of a stock graph in this picture illustration taken July 22, 2021. REUTERS/Dado Ruvic/Illustration

3D-printed Microsoft logos are seen in front of a stock graph in this picture illustration taken July 22, 2021. REUTERS/Dado Ruvic/Illustration

A 3D-printed Microsoft logo is seen in front of a stock graph in this picture illustration taken July 22, 2021. REUTERS/Dado Ruvic/Illustration

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 21, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 20, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 19, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 16, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 15, 2021. REUTERS/Staff

Smartphone with Mastercard logo is seen in front of displayed stock graph in this illustration taken, July 15, 2021. REUTERS/Dado Ruvic/Illustration

Smartphone with American Express logo is seen in front of displayed stock graph in this illustration taken, July 15, 2021. REUTERS/Dado Ruvic/Illustration

Smartphone with Visa logo is seen in front of displayed stock graph in this illustration taken, July 15, 2021. REUTERS/Dado Ruvic/Illustration

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 14, 2021. REUTERS/Staff

The app logo of Indonesian e-commerce company Bukalapak is seen on a mobile phone next to a stock graph displayed in this illustration picture taken July 14, 2021. REUTERS/Florence Lo/Illustration

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 13, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 13, 2021. REUTERS/Staff

Phillips Edison logo is seen through magnifier in front of stock graph in this illustration taken, July 13, 2021. REUTERS/Dado Ruvic/Illustration

Phillips Edison logo is seen on the smartphone in front of stock graph in this illustration taken, July 13, 2021. REUTERS/Dado Ruvic/Illustration

Blend logo is seen through magnifier in front of displayed stock graph in this illustration taken, July 13, 2021. REUTERS/Dado Ruvic/Illustration

Smartphone with Blend logo is seen in front of displayed stock graph in this illustration taken, July 13, 2021. REUTERS/Dado Ruvic/Illustration

Noom logo is seen through magnifier in front of displayed stock graph in this illustration taken, July 13, 2021. REUTERS/Dado Ruvic/Illustration

Smartphone with Noom logo is seen in front of displayed stock graph logo in this illustration taken, July 13, 2021. REUTERS/Dado Ruvic/Illustration

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 12, 2021. REUTERS/StafF

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 9, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 8, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 7, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 6, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 5, 2021. REUTERS/Staff

Robinhood logo is seen on a smartphone in front of a displayed stock graph in this illustration taken, July 2, 2021. REUTERS/Dado Ruvic/Illustration

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, July 1, 2021. REUTERS/Staff

Legalzoom logo is seen on a smartphone in front of displayed stock graph in this illustration taken, July 1, 2021. REUTERS/Dado Ruvic/Illustration

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, June 30, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, June 29, 2021. REUTERS/Staff

Hipgnosis logo is seen in front of a displayed stock graph in this illustration taken, June 28, 2021. REUTERS/Dado Ruvic/Illustration

Binance logo and stock graph are displayed in this illustration taken, June 28, 2021. REUTERS/Dado Ruvic/Illustration

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, June 28, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, June 25, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, June 24, 2021. REUTERS/Staff

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, June 23, 2021. REUTERS/Staff

CEO of Switzerland Tourism Martin Nydegger points to a graph to explain the development of hotel nights during a news conference aboard the tourist vessel Albis on Lake Zurich, in Zurich, Switzerland June 23, 2021. REUTERS/Arnd Wiegmann

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, June 22, 2021. REUTERS/Staff

A 3D-printed oil pump jack and U.S. one dollar banknote are seen in front of displayed Torchlight Energy logo and stock graph in this illustration picture taken June 22, 2021. REUTERS/Dado Ruvic/Illustration

Torchlight energy stock graph is seen in front of the company's logo in this illustration picture taken June 22, 2021. REUTERS/Dado Ruvic/Illustration

Torchlight energy stock graph is seen in front of the company's logo in this illustration picture taken June 22, 2021. REUTERS/Dado Ruvic/Illustration

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, June 21, 2021. REUTERS/Staff

People are reflected on an electric board showing Nikkei index and its graph outside a brokerage at a business district in Tokyo, Japan, June 21, 2021. REUTERS/Kim Kyung-Hoon

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, June 18, 2021. REUTERS/Staff