The Fed is 'tone deaf' if it hikes interest rates when a debt default and banking crisis are looming, top economist David Rosenberg says

• David Rosenberg warned the Federal Reserve against hiking interest rates any further. 
• "These guys are tone deaf," the veteran economist tweeted on Tuesday. 
• Rosenberg said inflation is waning, and flagged a debt default and banking crisis as key concerns.

Veteran economist David Rosenberg has warned the Federal Reserve against hiking interest rates any further, as he believes the inflation threat has faded and the US economy is already facing two big risks.