How to spot a financial bubble
Oct 02, 2020
3 minutes
By Johan Fourie
ne of the most influential mathematicians of all time, Sir Isaac Newton, lost a fortune by investing in the South Sea Bubble of 1720. When asked why, with all his mathematical prowess, he could not foresee the collapse of the stock, he is reputed to have said that ‘he could not calculate the madness of the people’. And who can blame him for being unable to understand the seemingly irrational behaviour of hundreds or thousands or, sometimes, millions of people – the madness of crowds, as the journalist Charles Mackay coined the phrase in an 1841
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