| InvestHub.com's Finance Dictionary and Glossary of Investment Terms October Effect Definition 1.
A theory that postulates that stocks will tend to decline during the month of October. | Definition 2.
The perception that the stock market tends to do poorly in October. Although historically there has been a slight underperformance in October which most observers attribute to chance, the psychological effects of a few serious market crashes in October have kept the perception alive. |
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