(Reuters) -The U.S. Treasury Department saw soft demand for a $16 billion sale of 20-year bonds on Wednesday with investors ...

The Dow closed lower by 817 points, or 1.91%. The broader S&P 500 slid 1.61% and the tech-heavy Nasdaq Composite fell 1.41%.

The Treasury sold $16 billion worth of 20-year bonds, and the auction settled with a 20-year Treasury yield above 5%, ...