Wall of worry is an informal expression often used in financial jargon to refer to:
a market uptrend that occurs when there is significant uncertainty about its sustainability. For example, if the market is concerned about potential, new regulations or the possibility of recession but stocks increase anyway, this is called climbing a wall of worry. Price correction often follows a wall of worry.
According to investorwords the expression wall of worry was coined in the 1950's
There is a lot of material on the web regarding the meaning of this curious expression, but I could not find anything about its possible origin.
Is "wall of worry" just a new expression invented by imaginative financial brokers, or was it taken from another source (historical, literary or biblical for instance )?