Goldman Sachs, one of the world's leading advisers on IPOs, will no longer take companies in the US and Europe public if they have boards made up entirely of white men.

Speaking to CNBC at the World Economic Forum at Davos on 23 January, the US investment bank’s chief executive, David Solomon, said: “I think from a governance perspective, diversity on boards is a very, very important issue. We have been very, very focused on it. So we’re trying to find ways to encourage that.”