HONG KONG (Reuters) -Around 80% of Hong Kong-based investment banking staff at Credit Suisse will be made redundant starting this week, two people with knowledge of the matter said, as part of the bank's integration with UBS Group. Only about 20 bankers will be spared the cuts that will impact Credit Suisse's 100-strong investment banking team in the territory, the people said, declining to be identified as discussions on the matter were private. Credit Suisse and UBS declined to comment.