Friday, February 1, 2013

S&P Annual Performance After a Big January

This is an update to a post that I first wrote last year, the last time that the S&P 500 had a big rise in the first month of the year.

When the S&P 500 has a good first month, it has statistically been followed by a really good year.  The index has risen by more than 4% in January 18 times in its 56 year history.  In those years it has averaged a 21.1% return for the full year, and it has been up double digits in every one of those years except for 1987 (which was a good year up until the October crash).

The S&P 500 has never been negative in a year with a big January, but it's worth noting that if a similar analysis is performed on the Dow, which has a 118 year history, there are five years (out of 28) that the index was up more than 4% in January and ended negative for the year.  Many of those years were significantly negative too: the average loss was 18.4% and the list includes 1914, 1929 and 1930.  The index ended those years down 30.7%, 17.2% and 33.8% after being up 5.1%, 5.8% and 7.5% in January respectively.

Weird eerie coincidence, the Dow has had a daily crash three times in its history: in 1914, 1929 and 1987.  All three years had big Januaries.

No comments:

Post a Comment

For compliance reasons, I don't post comments to the site, but I do like hearing from readers and am happy to answer any questions. Feel free to use the comment box to get in touch. Please leave an email address in your comment so that I can write back, or email me directly at