That change in trend was reinforced by the slowdown in takeover activity, which had tended to be focused on small and medium-sized companies.

ECONOMIST: Looking for growth stocks when there is not much growth

Other banks have been similarly boosted by the surge in takeover activity on global stock markets and by the growth of private client banking for wealthy customers.

BBC: ?5 note and credit card

The Federal Bureau of Investigation (FBI) is joining an investigation by the into suspicious trades ahead of that takeover after unusual trading activity in the shares was noticed the day before the deal was announced.

BBC: Warren Buffett