Pretty astonishing number. Here is Visual Capitalist with the details:
Global equity markets have nearly tripled in size since 2003, climbing to $109 trillion in total market capitalization. Over the last several decades, the growth in money supply and ultra-low interest rates have underpinned rising asset values across economies…
With the world’s deepest capital markets, the U.S. makes up 42.5% of global equity market capitalization, outpacing the next closest economy, the European Union by a significant margin.
Batnick also takes a swing at this: What’s the Stock Market Worth?
Market Share by Country (Visual Capitalist) as of Q2 2023: