
Is October a bad month to invest in the stock market?
Some investors may be nervous during October because some large historical market crashes occurred during this month. The events that have given October the reputation for stock losses have happened over decades, but they include:
What is the October effect in economics?
The October effect refers to the psychological anticipation that financial declines and stock market crashes are more likely to occur during this month than any other month. The Bank Panic of 1907, the Stock Market Crash of 1929, and Black Monday 1987 all happened during the month of October.
Do stocks really trade lower in October?
While statistical evidence doesn't support the phenomenon that stocks trade lower in October, the psychological expectations of the October effect still exist. The October effect, however, tends to be overrated. Despite the dark titles, this seeming concentration of days is not statistically significant.
What happens to the stock market in September?
Indeed, during the month of September, the S&P 500 Index -- an index that reflects trading in some of the stock market's biggest companies -- declined 5 percent or more in four of the 10 Septembers of the decade leading up to 2010.

Is October a good time for stock market?
Bespoke found that while October is remembered for stock market crashes, like those in 1929 and 1987, the market is usually positive. The Dow, for instance, gained 60% of the time in October over the past 50 years, averaging an increase of 0.5%.
Why is stock market volatile in October?
The October effect refers to the psychological anticipation that financial declines and stock market crashes are more likely to occur during this month than any other month. The Bank Panic of 1907, the Stock Market Crash of 1929, and Black Monday 1987 all happened during the month of October.
Is October a good month to invest?
Using stock market data from 2000 to 2020, the best month to buy stocks is April, as the S&P500 has increased 2.4% in 15 of the last 20 years. October and November are also good months to buy stocks, increasing by 1.17% and 1.08%, respectively, increasing 75% of the time.
What months are worse for stock market?
Key Takeaways Since 1950, the Dow Jones Industrial Average (DJIA) has averaged a decline of 0.8%, while the S&P 500 has averaged a 0.5% decline during the month of September. The September Effect is a market anomaly, unrelated to any particular market event or news.
Which month is market most volatile?
In fact, looking at the chart above of monthly average returns, September averages the worst among the calendar year. The October effect is also salient for some investors. Even though October, on average, has been a positive month historically, many of the worst market crashes have occurred in this month.
Will stocks continue to rise 2021?
U.S. stocks are on track to end 2021 with another year of outsize gains. Many investors aren't expecting a repeat in 2022. The S&P 500 has climbed 26% so far in 2021, after rising 16% in 2020. Rip-roaring corporate profits and easy monetary policy have fueled the run.
What month are stocks the highest?
What the Data SaysRankMonth of YearFrequency of Growth (%)#1December79.0%#2April74.3%#3October68.6%#4July61.7%9 more rows•May 30, 2022
Which day of the month is the best to buy stocks?
And according to it, the best days for trading are Mondays. This is also known as “The Monday Effect” or “The Weekend Effect”. The Monday Effect – a theory suggesting that the returns of stocks and market movements on Monday are similar to those from the previous Friday.
What time of day are stock prices lowest?
The upshot: Like early market trading, the hour before market close from 3 p.m. to 4 p.m. ET is one of the best times to buy and sell stock because of significant price movements, higher trading volume and inexperienced investors placing last-minute trades.
Is November usually a good month for stocks?
Overall, we can't be certain why these seasonal trends happen. But November through April does tend to be the strongest part of the year for stocks, experts say.
Why do shares drop in September?
Explanations for the September Effect The September effect is not limited to U.S. stocks but is associated with markets worldwide. Some analysts consider that the negative effect on markets is attributable to seasonal behavioral bias as investors change their portfolios at the end of summer to cash in.
Do stocks typically go down in December?
Analysts generally attribute this rally to an increase in buying, which follows the drop in price that typically happens in December when investors, engaging in tax-loss harvesting to offset realized capital gains, prompt a sell-off.
Why are investors nervous in October?
Some investors may be nervous during October because the dates of some large historical market crashes occurred during this month. The events that have given October the reputation for stock losses have happened over decades, but they include: The Panic of 1907. Black Tuesday (1929)
What happens if investors see a month negatively?
If investors tend to see a month negatively, it will create opportunities to buy during that month. However, the end of the October effect, if it ever was a market force, is already at hand.
Why were trusts considered risky in 1907?
Throughout the year, the public's confidence continued to diminish in trust companies, which were considered risky because of their lack of regulation. Eventually, public skepticism came to a head in October and sparked a run on the trusts.
What happened on Black Monday 1987?
Black Thursday (1929) Black Monday (1929) Black Monday (1987) Black Monday, the great crash of 1987 that occurred on October 19 and saw the Dow plummet 22.6% in a single day, is arguably the worst single-day decline. The other black days, of course, were part of the process that led to the Great Depression—an economic disaster ...
Is October the most volatile month for stocks?
What is true is that October has traditionally been the most volatile month for stocks. According to research from LPL Financial, there are more 1% or larger swings in October in the S&P 500 than any other month in history dating back to 1950.
Is the October effect a psychological phenomenon?
The October effect is considered to be primarily a psychological expectation rather than an actual phenomenon as most statistics go against the theory. The October effect, as well as other calendar anomalies, have seemed to largely disappear over the past decades.
Is the October effect statistically significant?
While statistical evidence doesn't support the phenomenon that stocks trade lower in October, the psychological expectations of the October effect still exist. The October effect, however, tends to be overrated. Despite the dark titles, this seeming concentration of days is not statistically significant.
What is the significance of October?
Since the early 20th century, the month of October has been associated not only with a lower stock market, but also prolonged bear markets, in which the stock market loses one-fifth of its value or more, and economic recessions. This has created a foreboding for market losses among investors when the calendar reaches the month of October each year.
Why is October a jinx?
The "Stock Traders Almanac" has labeled October a jinx because of the frequency of market crashes that have occurred in the month, according to a 2012 "USA Today" article . The worst October ever was in 1987, when the stock market declined more than 23 percent.
When do emotions turn negative?
Emotions and Seasons. Investors' emotions can turn negative when the calendar changes from summer to fall, and this influences stock market performance. In the fall months, after summer vacations are basically over and the sun sets earlier, investors' moods lean toward the gloomy.
What happened in 1929?
When the stock market crash of 1929 occurred, it took investors by surprise. Weeks before the crash, the stock market reached a new high, and stock prices were 25 percent higher than in the previous year. By October, however, underlying weakness in the economy became apparent, and stocks lost nearly one-quarter of their value over two days, costing investors billions of dollars. This market crash ushered in that era's Great Depression, and the month of October has served as a constant reminder to investors of how quickly fortunes can reverse.
What is the scary thing that happens in October?
It’s known as the October Effect, and the belief goes that October is a treacherous time for investors who aren’t prepared for it. Even some investing experts advise that you be very careful when making moves in October.
How many shares were traded on Black Tuesday 1929?
On that Tuesday — which came to be known as Black Tuesday — about 16 million shares were traded in a single day, marking a record at the time.
What happened on October 19, 1987?
The second event that left a bad taste in investors’ mouths is known as Black Monday, which took the stock market by surprise on October 19, 1987. In a single day, the Dow Jones Industrial Average suddenly gave up 22% of its value. That fateful Monday would mark the beginning of a global stock market decline.
What is Halloween celebrated for?
It’s the month in which Halloween is celebrated — a holiday that glorifies horror movies and frightening creatures, and one in which we reward children with candy for doing nothing more than walking up to strangers in masks and asking for it. Many investors believe there is another scary event that happens in October.
What happened on Black Monday 1987?
By the end of October, 1987, most major indexes around the world had fallen by 20% or more. Luckily, the market recovered quickly and another Great Depression was averted. To this day, no one can pin down why Black Monday happened.
Is October a good month to invest?
Although the month of October is, statistically, nothing to fear, there’s a good reason why the October Effect myth has become so deeply ingrained in the minds of the investing public. The month of October happened to be the setting for some of the most painful declines in stock market history.
Is October a bad month for the stock market?
Looking at this data, it’s clear that October isn’t a bad month for the stock market at all. Not only has the S&P 500 gained in the month of October more often than it has declined, but the returns for the index during the month have been positive on average during the past nine decades.
Referenced Symbols
October isn’t living up to its reputation for volatility, but that doesn’t mean investors aren’t nervous.
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About the Author
William Watts is MarketWatch’s senior markets writer. Based in New York, Watts writes about stocks, bonds, currencies and commodities, including oil. He also writes about global macro issues and trading strategies. Before moving to New York, he reported for MarketWatch from Frankfurt, London and Washington, D.C.

What Is The October Effect?
Understanding The October Effect
- Proponents of the October effect, one of the most popular of the so-called calendar effects, argue that October is when some of the greatest crashes in stock market history, including the 1929 Black Tuesday and Black Thursday and the 1987 stock market crash, occurred.2While statistical evidence doesn’t support the phenomenon that stocks trade lower in October, the psy…
Special Considerations
- What is true is that October has traditionally been the most volatile month for stocks. According to research from LPL Financial, there are more 1% or larger swings in October in the S&P 500 than any other month in history dating back to 1950. Some of that can be attributed to the fact that October precedes elections in early November in the United States every other year. Oddly enou…
The Disappearance of The October Effect
- The numbers don’t support the October effect. If we look at all October monthly returns going back more than a century, there simply is no data on average to support the claim that October is a losing month. Indeed, some historical events have fallen in the month of October, but they have mostly stuck around in the collective memory because Black Monday sounds ominous. Market…