When Mark Tucker arrived as HSBC’s new chairman on a cloudy London day in October 2017, he was prepared for a challenge. The former insurance boss was the first outsider to lead the now 157-year-old bank, which was in the middle of a period of intense upheaval. HSBC was slimming down its investment bank, selling poorly performing businesses and slashing thousands of jobs as it tried to adapt to the post-financial-crisis era.
While Tucker was…