David Rosenberg took a jab at billionaire investor Bill Ackman for his bet against US Treasurys. His view contrasts to Ackman who revealed he's shorting 30-year US Treasurys as a hedge against high inflation. That contrasts to Ackman's view of stubbornly high inflation, which has led him to short US Treasurys. Bond prices tend to have an inverse relationship to interest rates. When interest rates go up, bonds usually fall.

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Persons: David Rosenberg, Bill Ackman, Ackman, he's, Rosenberg, Fran Fed's Organizations: US, Service, Rosenberg Research, Reserve, Ackman's, Federal Reserve Bank of San, Federal Reserve, Pershing, stoke Locations: Wall, Silicon, Federal Reserve Bank of San Francisco