Reports about positive gross domestic product readings and other relatively good readings of the economy condition are just disguising the true state of affairs which is Depression of the US economy, believes Gluskin Sheff economist David Rosenberg said Tuesday.

In his daily briefing to investors, Rosenberg said the Great Depression also had its high points, with a series of positive GDP reports and sharp stock market gains. But then as now, those signs of recovery were unsustainable and only provided a false sense of stability, said Rosenberg.

Rosenberg calls current economic conditions "a depression, and not just some garden-variety recession," and notes that any good news both during the initial 1929-33 recession and the one that began in 2008 triggered "euphoric response."

"Such is human nature and nobody can be blamed for trying to be optimistic; however, in the money management business, we have a fiduciary responsibility to be as realistic as possible about the outlook for the economy and the market at all times," he said.

The 1929-33 recession saw six quarterly bounces in GDP with an average gain of 8 percent, sending the stock market to a 50 percent rally in early 1930 as investors thought the worst had passed.

"False premise," Rosenberg said. "And guess what? We may well be reliving history here. If you're keeping score, we have recorded four quarterly advances in real GDP, and the average is only 3%."