Is the 60/40 portfolio fit for purpose?

The 60/40 portfolio has been a mainstay of modern portfolio theory, with the greater weighting towards equities over bonds being a feature of the typical portfolio. However, more recently that approach has come into question as returns from both asset classes have become challenging - with issues being exacerbated by the coronavirus pandemic. John Prior, chief investment officer at Patronus Partners, spoke about whether there are any alternatives for investors.