When Fed tightening ends, nothing performs better than 30-year Treasurys - not even the S&P 500, top economist Davis Rosenberg says

• 30-year US Treasury bonds should outperform the stock market as the Fed tightening cycle nears its end.
• That's according to top economist David Rosenberg, who called the 2008 housing crash. 
• Rosenberg said the current stock market rally "has been rather junky."

Bonds should outperform stocks as the Federal Reserve ends its cycle of hiking interest rates, according to top economist David Rosenberg.