Mohamed El-Erian. REUTERS/Jason Reed Roller-coaster views about global growth were important contributors to the first quarter's dramatic "V"-shaped stock market performance — from a scare early in the year that weakness in China and elsewhere could tip the US into recession to a more comforting assessment underpinned by friendly central banks and, in the case of the US, strong job creation.

Disappointing growth is also the common element behind numerous improbable developments that have become reality, be they negative central-bank policy rates in Europe and Japan, almost one-third of government debt globally trading at negative yields, or the influence of antiestablishment political movements on both sides of the Atlantic.

Given the economic/financial/political/social implications of this protracted period of low growth, here are the 10 things you need to know right now: