The phrase “sell in May and go awayThe phrase “sell in May and go away” is an old adage that has been used by investors for decades. The phrase is often used as a warning to investors who may be considering inve...” is an old adage that has been used by investors for decades. The phrase is often used as a warning to investors who may be considering investing in the stock market during the summer months. The phrase is based on the idea that the stock market tends to perform poorly during the summer months, and that investors should wait until after the summer to start investing.