The following table lists the five FTSE 350 shares that have the best returns in January over the last ten years. For example, Computacenter has an average return of 9.3% for the month of January. All stocks have risen in January for nine of the past ten years.
The following table lists the five FTSE 350 shares that have the worst returns in January over the last ten years. For example, Unilever has an average return of -3.2% for the month of January. All five stocks have fallen in eight of the past ten years in January.
An equally-weighted portfolio of the above strong January stocks would have out-performed every year an equally-weighted portfolio of the above weak January stocks by an average of 10.5 percentage points in January for the past ten years.
Generally, January is a very good month for investors. A recent academic paper (Vichet Sum, 2013) found that January has the second strongest average monthly returns for 70 world markets, and has been the strongest month of the year for 16 of those markets.
However, this is no longer the case in the UK. Although January used to the strongest month of the year for the UK stock market (with an average month return of 4.5% for the period 1970-1999), this changed after the dot-com crash. Since 2000 the average month’s return has fallen to -1.8% and the market has risen in this month in only five years since 2000 – making January the weakest month of the year in the last few years.
January follows the strongest two-week period of the year (the second half of December); and this exuberance traditionally carries over into the first few days of January as the market continues to climb for the first couple of days. But by around the fourth trading day the exhilaration is wearing off and the market then falls for the next two weeks – the second week of January has been the weakest week for the market in the whole year. Then, around the middle of the third week, the market has tended to rebound sharply.
The month is better for mid-cap and small-cap stocks. On average, since 2000 the FTSE 250 Index has outperformed the FTSE 100 by 2.2 percentage points in January – the best out-performance (with February) of all months. Small caps do even better, out-performing the FTSE 100 by an average 2.7 percentage points in the first month. The out-performance of small-cap stocks in this month has been the subject of many academic studies and is called the January Effect.
There are two other interesting anomalies in the month (that are also sometimes, and confusingly, called the January Effect). The first is a famous market predictor in the US which holds that the direction of the market in the whole year will be the same as that for the first five days of January. Research shows that the same rule works more or less for the UK market as well. The third effect comes from a U.S. paper written in 1942 which proposed that stocks rose in January as investors began buying again after the year-end tax-induced sell-off. As noted above, that has been less true in recent years.
Since 1985 the FTSE 100 Index has increased on average 0.50% over the first five trading days of the new year.
The following chart shows the market returns for the first five trading days for all years from 1985. For example, over the first five days of 1985 the index rose 0.89%.
The following chart shows the daily returns for the FTSE 100 for each of the five days in the new year. For example, on average since 1985 the index has risen 0.40% on the first trading day of the year.
Tomorrow will be the last trading day (LTD) of January.
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 can clearly be seen in the case of January from the chart below. From 1984 to 1999 the FTSE 100 only fell twice on the last trading of January. But since year 2000 the market fallen more often than risen on this day.
Since 1984 the market has on average risen 0.19% on the LTD of January, with positive returns in 62% of all years, which makes the January LTD the third strongest month LTD in the year. However, as indicated above, things have changed since 2000: the average LTD return in January has been -0.17% making it the third weakest month LTD in the year.
The following chart shows the FTSE 100 Index returns for every January LTD since 1984.
The following chart plots the average performance of the FTSE 100 Index during January since 1984 (more info on this type of chart).
As can be seen, historically the market starts strong the first few days but then sells off for two weeks, until rebounding strongly in the final week of the month.
The following chart shows the average performance of the market in December (1984-2013) and overlays the actual performance in December 2013.
In December 2013 the market was weaker than usual in the first couple of weeks, but the market then followed the historical trend when the Santa rally kicked in around the 10th trading day of the month.