Why It May Be Unwise To Remain Uninvested During The Last Four Months Of The Year

Why It May Be Unwise To Remain Uninvested During The Last Four Months Of The Year

According to the seasonal performance of the markets, it seems we cannot afford not to invest in the markets for the last 3 months, especially November.

Here is the average 1-month per cent change in the Dow Jones Industrial Average from 1880 to 2012:

This post was originally posted here. The writer is a veteran community member and blogger on InvestingNote, with a username known as @Kyith.

From this chart, it seems we have to stay invested from October to the end of January.

I was in the mood, so I dug up the performance of S&P 500, MSCI World and MSCI Emerging Markets in these 4 months from 1999 to 2020:

There are 22 periods during this analysis. The majority of this four-month period (1st Oct to 30th Jan) is positive.

There were more negative occurrences for MSCI World and Emerging markets compared to S&P 500.

Average returns have been positive, with Emerging markets having higher returns.

However, this period is not foolproof. I think most four-month periods were rather livable except for the four-month during 2007 and 2008. That is some nasty drawdown.

I was surprised that only one out of 1999 to 2002 was negative during October to January. I would have expected more since this is one of the more shitty bear markets in recent memory (by virtue of how big of a psychological grind it was)

If we only count the last 5 years, the lowest cumulative returns are about 6.6% to 6.7% for the S&P 500 and MSCI World.

Since I am on a roll here, why not take a look at the performance of “buy-in October and sell before May”?

So I tabulated the data from 1999 to 2020 below:

There are 22 periods. 81.8% of those periods are positive.

2000, 2007 and 2008 were periods where this strategy didn’t work so well. Or rather, this strategy does not completely eliminate downsides.

The average return is very respectable.

What is amazing is that the return at the 25th percentile was not very high, but still positive.

If there is a conclusion to be made, it is that quantitatively, missing out on returns by not being invested during these two periods are going to hurt returns if you hold a strategic long-term portfolio.

Once again, this article is a guest post and was originally posted on @Kyith‘s profile on InvestingNote. 

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