There is nothing so disastrous as a rational investment policy in an irrational world.
Interpretation
The quote emphasizes that logical investment strategies can fail in an unpredictable and irrational market environment.
John Maynard Keynes points out the paradox of trying to apply rational investment strategies in a world that often behaves unpredictably and irrationally. This highlights the challenges investors face when market conditions are influenced by emotions, speculation, and other non-logical factors, suggesting that even the best-planned investment policies can lead to disaster if they don't account for the inherent chaos of the market.
In practice
During a finance seminar discussing market trends and rational investing strategies.
As time goes on, I get more and more convinced that the right method of investment is to put fairly large sums into enterprises which one thinks one knows something about and in the management of which one thoroughly believes.
The ideas of economists and political philosophers, both when they are right and when they are wrong, are more powerful than is generally understood. Indeed, the world is ruled by little else.
The disruptive powers of excessive national fecundity may have played a greater part in bursting the bonds of convention than either the power of ideas or the errors of autocracy.
We will not have any more crashes in our time.
This long run is a misleading guide to current affairs. In the long run we are all dead. Economists set themselves too easy, too useless a task if in tempestuous seasons they can only tell us that when the storm is long past the ocean is flat again.
The book, as it stands, seems to me to be one of the most frightful muddles I have ever read, with scarcely a sound proposition in it beginning with page 45 [Hayek provided historical background up to page 45; after that came his theoretical model], and yet it remains a book of some interest, which is likely to leave its mark on the mind of the reader. It is an extraordinary example of how, starting with a mistake, a remorseless logician can end up in bedlam.
Don't try to buy at the bottom and sell at the top. It can't be done except by liars.
It's difficult to make your clients understand that there are certain days that the market will go up or down 2%, and it's basically driven by algorithms talking to algorithms. There's no real rhyme or reason for that. So it's difficult. We just try to preach long-term investing and staying the course.
The [stock] market,like the Lord, helps those who help themselves. But, unlike the Lord, the market does not forgive those who know not what they do.
Families rely on financial services more than ever, but those who need them most - who struggle to make ends meet - too often must contend with sky-high interest rates and tricks and traps buried in the fine print of their loan products.
Long-term investing has gotten so popular, it's easier to admit you're a crack addict than to admit you're a short-term investor.
The math you need for most of finance is ninth-grade algebra, and most people feel reasonably comfortable with that. But I think the financial world there has been - I don't know if it's by design, or this is how it's evolved - there are bad actors who have wanted to obfuscate because you can benefit from the lack of transparency.
Subscribe for the occasional hand-picked quote. No noise.