They are now clustered around half of this. Similarly, there has been a downward shift in estimates of potential growth in Asia, especially in China and South Korea. With economies expected to grow less quickly than in the past, there is less incentive to invest.
https://www.rba.gov.au/speeches/2019/sp-gov-2019-10-29.html  13/18  10/30/2019  Some Echoes of Melville | Speeches | RBA  Graph 10  So these are some of the main factors influencing saving and investment globally and that help to explain low global interest rates. But this is not the full story. Central banks are also playing a role.