The blow that low growth can deliver to earnings can be seen from the fact that in the five years to 2001, the US average annual growth rate was a bulging 4%. Yet over that period, the rise in reported earnings was averaging 10%. Indeed, according to the US tax authorities, the rise was rather less. So achieving those predicted profit rises in the US this year, or indeed the eurozone, would be something of an economic miracle. Or perhaps a mirage.