# Warren Buffett Just Released a Farewell Letter. It Contains the Most Devastating 4-Word Piece of Investment Advice I've Ever Heard.

> **Newsylist Open Intelligence Dossier** · First detected: 2026-09-21 21:29 UTC · Category: Business · Sources: 3 · Current Velocity: 1.3

## Key People, Organizations & Locations
Letter, Investment, Released, Warren, Buffett, Farewell, Advice, Devastating, Piece, Most

## Multi-Source Evidence Table
| Source Outlet | Headline | Published (UTC) | Verification URL |
|---|---|---|---|
| Fortune | Billionaire Warren Buffett once called Berkshire Hathaway the ‘dumbest’ stock he ever bought | 2026-09-21 09:51 | [Source Link](https://news.google.com/rss/articles/CBMi6gFBVV95cUxOaGVBa2JYNFlIQ19OY2oySHp2YmJWLUVoV2g1MGdLand1NlZiVXRoVGtBVUc1SFQxWnlfZ2ZwTUtJc1RVdGJkcWMtMC1fY0Jndm14YXhhTjJTWm5DWlFMUXREZHFXOVZhbzVNWElERVVBd3VoTXZzcUc5T0xKcVcyUlBxcFpTaTNpRE9nS004QWFqZ0xBOGVNVGdRa0xxbU9rVU4tTkRHWUtabS1FWXI4YnlHZXhwSDBZSHpkRy1fTnFwNFFLNmUyaW5rSFdmY0F0Xzhyd2Y5UExTWkRvMG4tRWFCRFZRVlVFWWc?oc=5) |
| The Motley Fool | Warren Buffett Just Released a Farewell Letter. It Contains the Most Devastating 4-Word Piece of Investment Advice I've Ever Heard. | 2026-09-21 09:51 | [Source Link](https://news.google.com/rss/articles/CBMilwFBVV95cUxNNldFdTJrTUFJV01tenF1R3d6d0ljWlRZQnB4WFo1aGNuOC1kVzBnNXhndy1YaGp4QWpEOWZvUi1RN1gxbUdRejVsdml3YXUyY1pyc3I4cFpuZ3Y1Wk4xNnlXcVJ1VkFMbzlIeDZHOEdDRmZvcWNsY1A1VFZMZjV4T29lLS1VTVpnQ2ZjYzhhN0xDSzFQUDVr?oc=5) |
| Yahoo Finance | Warren Buffett Just Released a Farewell Letter. It Contains the Most Devastating 4-Word Piece of Investment Advice I've Ever Heard. | 2026-09-21 09:11 | [Source Link](https://news.google.com/rss/articles/CBMipAFBVV95cUxQOGNMSzBwb2Q0RnR5MC1nM0FZREk2Z1ZxYUxsOVBLYnJJZ2JOYmgxbi1vVlp6dkpTT1lOVEluR25RMXRGbjBrZ1Y2V2U2Rm9SMUpFRkYtUUJveWFkcmZ1Ykk5UXB1cjI5Y0E2ZTFGT3dKdmsyT2xmRmFzR1Ytd3VLRmgzLU1rZ3NmT3FvR25mZE9qa2N5NlhUSm5pbEpjZ2NqUGQxRg?oc=5) |

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