Credit Suisse and Morgan Stanley are set to move into the top 10 bookrunner rankings in Hong Kong after being named among a quartet of banks that will help bring Graff Diamonds to market with a $1bn initial public offering early next year.

The London-based jeweller filed for its IPO on the Hong Kong Stock Exchange today. The listing, scheduled for January 1 2012, aims to raise $1bn in order to fund its expansion into the Asian market.