HSBC head of media relations Richard Lindsay said: "It is the most international campaign HSBC has ever launched. The index is an ongoing project and we will work with Weber Shandwick at least into 2010."
The work is being managed from the agency's London and Hong Kong offices, with a focus on Asian markets.
WS won the account via a competitive pitch that came out of the aborted tender for HSBC's unified global PR account earlier this year.
In July, HSBC launched a campaign in China called 'Accomplishment in life' that presented family and success as key life values.