Next Monday will be the last trading day (LTD) of October.
Historically, the last trading day of October has been the strongest LTD of any month in the year. Since 1984 the market has on average risen 0.46% on the LTD of October, with positive returns in 69% of all years.
The following chart shows the FTSE 100 Index returns for every October LTD since 1984.
As can be seen on the chart the market only fell twice on the October LTD in the 19 years from 1984 to 2002. One possible reason for this may have been that November is the start of the strong six month period of the year (this is part of the Sell in May effect), and investors could have been buying equities at this time in anticipation of that.
However, in recent years this pattern of behaviour has changed. Quite dramatically so – in the last seven years the market has only risen once on the October LTD. Last year (2015) the FTSE 100 Index was down 0.5% on the last trading day of October.