The oil prices slump last week has given to the crisis resulting from the corona virus outbreak a new dimension. It has weighted on the financial markets which were starting to hope thanks to the reduction of the mortality rate and the announcement of the first measures about the end of lockdown. The quotation with a maturity date of the American petrol (measured by the WTI index) went even into negative territory and the Brent index, which is a representative one for the rest of the world, went below 20 dollars per barrel. It had fluctuated between 50 and 60 ...