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News · Equities · MarketWatch · Mon, Sep 28, 2026 9:00 PM

October is historically the most volatile month for stocks. But why? These 4 popular theor

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Although October historically has been the most volatile month of the year, you shouldn’t bet that it will continue to be in the future.

OpenBook market desk: Although October historically has been the most volatile month of the year, you shouldn’t bet that it will continue to be in the future.

Why this matters for multi-asset traders

The headline theme is "October is historically the most volatile month for stocks. But why? These 4 popular theories fail to hold up.". We reframe the story for readers tracking equities, FX majors and crypto liquidity - without copying the original wording.

Watch related price action on OpenBook movers and treat this note as information, not investment advice.

Based on reporting from MarketWatch. Read the original.

This briefing was summarized with automated tools from public reporting by MarketWatch and is general market information, not investment advice. Editorial policy & corrections