by P.J. DiNuzzo November 1, 2018
Nobody knows why the S&P 500 index declined more than 11% in October; the largest decline since, well, earlier this year.
But experienced investors know that these declines are not unusual. Since March 2009, the U.S. stock market has seen 23 pullbacks greater than 5%; eight greater than 10%. You can see all of them on the accompanying chart; on average, these pullbacks have lasted 42 days and dropped prices by 9.3%. And this is during a very long bull market!
Interestingly, the S&P 500 today isn't the same as it was back when the current bull market began; in fact, there are only 337 stocks remaining in the index that were included on March 9, 2009. A small number-just 38 of them-accounted for much of the run-up in the index, each gaining more than 1,000%, led by amazon.com, which has gained 2,350%, or nearly 40% a year. Amazon is currently 25% off its highs-its fifth drawdown of 20% or more since 2009.
Is there a lesson here? Alas, we can't extrapolate the short-term future from these statistics. When stocks go on sale, it is often difficult to determine whether they will become even better bargains in the days ahead.
P.J. DiNuzzo, CPA, PFS, AIF®, MBA, MSTx
President, Founder, and Chief Investment Officer