LONDON (Reuters) - HSBC ( HSBC ) is preparing to wind down its M&A and equity capital markets businesses in Europe, the UK and the Americas as part of a major shake-up of its investment banking operations, a memo showed on Tuesday.

"...our intention is to move to a more competitive, scalable, financing-led model," Michael Roberts, CEO HSBC Bank said in the memo.

The bank said it would retain "more focused M&A and Equity Capital Markets capabilities in Asia and the Middle East".