It’s well known that John Maynard Keynes was one of the 20th century’s most important practitioners of the “dismal science” of economics. Less well known is that he was also an avid collector of fine art – and quite a successful one at that. The economist spent £12,847 on building up his art collection between 1917 and 1945. That collection, according to “Art as an Asset: Evidence from Keynes the Collector”, a study from the Cambridge Judge Business School, is today worth £76.2m, representing an inflation-adjusted return of 6.1% a year.

True, if Keynes had sunk his money into British stocks and reinvested the dividends, his beneficiaries would be sitting on around £90.2m. But share certificates don’t look half as good on the wall; not compared with Georges Seurat’s Study for La Grande Jatte (1884), bought by Keynes for £400 in 1919 while he was writing The Economic Consequences of the Peace following World War I. Keynes’ most expensive purchase was Paul Cézanne’s 1867 canvas L’Enlèvement (The Abduction), bought for £3,500 in 1935, while he was working on The General Theory of Employment, Interest and Money. The ten most expensive paintings in his 135-piece collection accounted for 80% of his total expenditure.

Keynes’s art investments performed better than bonds