Post lists historical October market crashes and 2025 Bitcoin flash crash
A post on r/investing lists historical October market crashes, including the Panic of 1907, the 1929 Crash, Black Monday in 1987, the 2008 Financial Crisis, and a Bitcoin flash crash on October 10, 2025. The post states that the 1987 drop was 22.6% and that the 2025 Bitcoin event lost over $19B in leveraged positions within 24 hours.
Why “Rumor”
- Only community or trader posts: r/investing
0 independent source groups across 1 post · evidence score 9/100. How labels work
Market around the story
| Asset | Price at first report | 6h before | 1h before | 1h after | 6h after | 1h move vs normal | 24h volume vs median |
|---|---|---|---|---|---|---|---|
| BTC | $80,806 | −1.1% | −0.80% ! | +0.92% | +0.47% | 2.6σ | 1.3× |
Returns are measured from the moment the story first appeared. “vs normal” compares the move with the asset's typical hourly move over the previous 30 days.
- DJI Still being measured. The price reaction is recorded once the market has traded for six hours after the first report.
What the sources claim
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On October 19, 1987, the Dow Jones Industrial Average fell 22.6%, the largest one-day percentage drop in history. DJI
“On October 19, 1987, the Dow Jones Industrial Average plummeted 22.6%, the largest one-day percentage drop in history.”
r/investing -
On October 10, 2025, Bitcoin had a flash crash that lost over $19B in leveraged positions within 24 hours. BTC
“October 10, 2025, Bitcoin’s Flash Crash, losing over $19B in leveraged positions within 24 hours.”
r/investing -
The 1929 Crash led into the Great Depression, with the Dow Jones dropping around 25% over a few days in late October. DJI
“The 1929 Crash (Black Tuesday/Thursday): The severe market collapse that led into the Great Depression, with the Dow Jones dropping around 25% over a few days in late October.”
r/investing -
The Panic of 1907 was a severe financial crisis that triggered a massive run on banks.
“The Panic of 1907: A severe financial crisis which triggered a massive run on banks.”
r/investing -
Steep declines and intense volatility of the Great Recession peaked in October 2008.
“The 2008 Financial Crisis: Steep declines and intense volatility of the Great Recession peaked in October 2008.”
r/investing
Sources
More on DJI
Summary and claims extracted by AI with prompt analyze-story@5 on 2026-10-15 12:30 UTC. Labels are computed from the sources, not by the model.