History shows that September is customarily the weakest month of the year for US equities – but this does not necessarily hold true following positive stock market performances during the summer, says Brian Belski, chief investment strategist at Oppenheimer Asset Management.
He says that since the second world war, the S&P 500 has suffered an average September fall of 0.5 per cent. But there has been a decided shift in seasonality patterns in the past 15 years.
