DAVID ROSENBERG: A number of warnings signs are bubbling up in the US economy

So now we have the Atlanta Fed slicing its Q2 real GDP growth estimate down to a 2.4% annual rate. Macroeconomic Advisers, usually quite a bulled-up bunch, is down to 2.3%. The New York Fed is at 1.9% for Q2 and 1.8% for Q3. It should probably be mentioned that ten weeks ago, the Atlanta Fed was sitting pretty at a 4.1% Q2 growth forecast.

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