Because growth is weak — period, full stop, end of story.
"We're facing a weak period for the entire office equipment universe," Mr. Rosenzweig warned.
"Germany's economy is heading for a weak period," IfW said.
Richard T. Curtin, director of surveys at the University of Michigan, predicted that the next six months would be "a very weak period" for the economy.
These losses are landing on top of what was, for most Americans, a remarkably weak period of expansion.
Normally, you would expect a weak period for developed economies to result in a bear market for raw materials.
However, September is traditionally a weak period for cinema-going, likewise recording the lowest monthly admissions totals in 2012, 2013 and 2014.
"There's a general sense still out there that the weak period is going to be short-lived," said Ethan Harris, a senior economist at Lehman Brothers in New York.
"We are entering a seasonally weak period for stocks, being the end of September and October," said Tim Radford, global analyst at Rivkin Securities in a note to clients.
