Finance & economics | Buttonwood

Bubble-hunting has become more art than science

With the usual gauges of frothiness out of action, behavioural signals are all investors have

UPON BEING sucked into investing during the South Sea Bubble, Sir Isaac Newton reflected that he could “calculate the motions of the heavenly bodies but not the madness of people”. From tulip mania in 17th-century Amsterdam to railway fever in Victorian Britain, history is littered with tales of investors who lost their heads shortly before they lost their shirts, in the grip of mass delusions described by Alan Greenspan, a former chairman of the Federal Reserve, as “irrational exuberance”.

This article appeared in the Finance & economics section of the print edition under the headline “Foam party”

The aliens among us: How viruses shape the world

From the August 22nd 2020 edition

Discover stories from this section and more in the list of contents

Explore the edition

Discover more

illustration of a stern-faced man in a suit with a green tie, set against a bright green background. A small building with a flag is depicted in the pocket of his suit

The great-man theory of Wall Street

Why finance is still dominated by bold individuals

Hong Kong’s property slump may be terminal

Demographics and geopolitics will make a recovery harder


A float is inflated in preparation for the Macy's Thanksgiving Day Parade.

Why everyone wants to lend to weak companies

An unanticipated side-effect of Donald Trump’s election victory


American veterans now receive absurdly generous benefits

An enormous rise in disability payments may complicate debt-reduction efforts

Why Black Friday sales grow more annoying every year

Nobody is to blame. Everyone suffers

Trump wastes no time in reigniting trade wars

Canada and Mexico look likely to suffer