The writer is chairman of Fulcrum Asset Management

The relentless rise in the number of new US Covid-19 infections, which is being followed by increased hospitalisation rates and fatalities in the worst affected states, suggests that Anthony Fauci of the White House coronavirus task force was justified when he recently described the deteriorating situation as a “perfect storm”.

So far, the US policy response has been muted, certainly compared to nationwide lockdowns in other countries in March. And markets remain surprisingly relaxed, reportedly because investors are optimistic that an effective vaccine from the Oxford university or Moderna trials may be “within sight”. Those trials are highly encouraging. But even the most favourable outcome in vaccine development would come too late to save the US economy from the spread of the virus over the next three months.