Russell Investments argues that unnecessary currency-transaction fees could cost investors as much as 2% of a portfolio's total value over a 40-year period.
Clearstream and Euroclear have signed agreements with the new Shanghai Clearing House, but fully efficient links to securities depositories in China are still some way off.
Senior currency strategist Michael Woolfolk believes China is becoming more flexible, while the yen is also poised to strengthen against the greenback.