(Bloomberg) -- Bill Gross, who runs the world’s biggest bond fund at Pacific Investment Management Co., said the global economic expansion will remain sluggish, with assets such as stocks at risk and subject to more volatility.

“What we see going forward is a global marketplace and a global economy where growth is slow,” Gross said during an interview on Bloomberg Television’s “Market Makers” with Erik Schatzker and Stephanie Ruhle. This will persist “for a long, long time. Certainly in the U.S. we saw some bad numbers over the past few days and we wonder whether or not that 3 percent growth rate in 2014 is for real.”

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