“Buy in gloom, sell in boom”

“Buy in gloom, sell in boom” is almost a combination of the investment proverbs “buy low, sell high” and “buy when there’s blood in the streets.” The proverb is used almost exclusively in Australia and New Zealand and is cited in print from at least 1970.
 
     
Google Books
Playing the Share Game in Australia:
A Guide and Reference Book for Local and Overseas Share-traders, Investors, Stockbrokers and Their Employees, Commerce, Economics and Accountancy Students
By James Bourke
Published by The Author, P.O. Box 96
1970
Pg. 23:
The very simple formula for medium-term trading is: Buy in Gloom Sell in Boom. Bull markets will always change to bear markets, and bear markets to bull ...
     
Google Books
The Three Rs of Investing:
Return, Risk, and Relativity
By Austin S. Donnelly
Published by Dow Jones-Irwin
1985
Pg. 165:
In a way this is an application of the traditional advice to “buy in gloom, sell in boom.”
     
Google Books
James Dilworth
By R. C. J. Stone
Published by Dilworth Trust Board
1995
Pg. 30:
It has often been said that if you wish to make money in property you should ‘buy in gloom and sell in boom’.
     
HighBeam Research
“Buy in gloom, sell in boom”.
Article from:Australasian Business Intelligence
Article date:May 26, 2002
Sunday Herald Sun
ABIX via COMTEX)—Colourful investment guru, Rene Rivkin, will speak at a seminar in Melbourne on 4 June 2002. Rivkin says that investors should confine their gambling to casinos, and not the stock market. He attributes his success as a sharemarket investor to strict adherence to a set of investment rules. He says that investors should be aware that every market boom comes to an end, and it is important to buy when stock prices are down and to sell during a boom. Rivkin adds that he innocent of the charges of insider trading that he faces over trading in Qantas shares. He stresses that he sold the shares in question shortly before there ...
 
Stuff.co.nz
How to get a bargain in the property gloom
Sunday Star Times
Last updated 00:43 23/03/2008
(...)
But he thinks it’s too early in the slump to say definitively that now is a good time to buy. “The old investment saying is `buy in gloom, sell in boom’. I don’t think that it’s gloomy enough yet. I think it will get gloomier.”