Tomorrow will be the last trading day (LTD) of December.
As explained in the 2014 edition of the Almanac the LTDs of months used to be stronger than average, but in recent years they have been weak. This is quite different from the first trading days of months which strongly out-perform the average for all days, and where the effect has strengthened in recent years.
Since 1984 the market has on average risen 0.04% on the LTD of December, with positive returns in 48% of all years, which makes the December LTD the fourth weakest month LTD in the year. Since year 2000 the market has risen on this day in only 5 years.
The following chart shows the FTSE 100 Index returns for every December LTD since 1984.