Source: https://mochatrade.com/learn/glossary/8-k

# 8-K
URL: https://mochatrade.com/learn/glossary/8-k
Last modified: 2026-10-17

An 8-K is the filing a US company must make within four business days of a material event: a merger, a CEO leaving, a lawsuit, results. It is often the first public document of the news, [live on EDGAR before the headline](https://mochatrade.com/learn/start-here/how-to-read-us-market-news), and it is why [guidance is public, not whispered](https://mochatrade.com/learn/us-market-structure/us-earnings-explained).

## Related terms

- Guidance (earnings guidance): https://mochatrade.com/learn/glossary/guidance
- Form 4: https://mochatrade.com/learn/glossary/form-4
- SEC filings: https://mochatrade.com/learn/glossary/sec-filings
- EPS: https://mochatrade.com/learn/glossary/eps
- 10-K and 10-Q: https://mochatrade.com/learn/glossary/10-k-and-10-q
- Market correction: https://mochatrade.com/learn/glossary/market-correction