The Guardian view on the London Stock Exchange: its struggles are symptoms of a broken growth model | London Stock Exchange

“We are, it is admitted, the financial centre of the world,” said the chairman of the Union Bank of London in 1903. Back then, the City of London was the world’s banker, and its stock exchange was worth as much as the New York and Paris exchanges combined. Today, the stock market is shrinking at its fastest rate since 2010. While the mining company Glencore’s recent decision to retain its London listing provided a temporary boost, it won’t stem the tide. Companies are increasingly ditching London and moving to Europe and the US.

Rachel Reeves hopes to revive the exchange by pushing stock ownership, encouraging people to become their own portfolio managers. The Confederation of British Industry (CBI) has its own proposals, including tax breaks and looser bonus rules. Both of…