Respected investor Rajiv Jain, a key driver behind the quality growth investment process at Vontobel Asset Management, has resigned and will leave the Swiss investment house in May, handing over responsibility for some £33 billion in assets to his long-term deputy.

Jain, who played a key role in shaping the £64 billion asset manager's quality growth investment boutique, which spans six strategies, will leave his roles as chief investment officer and co-chief executive in May, the firm confirmed in a statement on March 8.