Meanings
nounOctober effect (plural October effects)
plural October effects
- businessA market anomaly caused by widespread psychological anticipation of stock market crashes in the month of October.
Cite this entry
APA
October effect. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/October%20effect
MLA
“October effect.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/October%20effect. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “October effect,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/October%20effect.
Source: October effect on Wiktionary, CC BY-SA 4.0.