Based on a comparison of 58 countries in 2016, Hong Kong ranked the highest in market capitalisation of listed companies as of GDP with 995% followed by South Africa and Singapore. On the other end of the scale was Nigeria with 7.35%, Egypt with 9.91% and Argentina with 11.7%.
Average market capitalisation of listed companies as of GDP reached 99.4% in 2016 in the World according to OECD. This is 3.36 % more than in the previous year and -7.07 % less than 10 years ago.
Historically, average market capitalisation of listed companies as of GDP reached an all time high of 119% in 1999 and an all time low of 24.4% in 1978. The average annual growth amounted to 3.03 % since 1975.
Data for more countries are available at Market Capitalisation of Listed Companies (As % of GDP) indicator page.