While stocks are lower so far this week, it's not the time to panic.
"Do not fear volatility (I know, easier said than done for retail investors). We are encouraging our clients to take advantage of pullbacks and add to cyclical sector equity exposure," Wren said.
He also believes growth concerns in China appear overdone.
"China's currency devaluation, the fall in oil prices and a mid-year soft spot in global manufacturing activity have created bearish sentiment around the potential for an economic slowdown and the threat of global deflation. Our 2016 GDP estimate is 6.2 percent....the 'controlled slowdown' remains intact," Wren said.
Burt White, chief investment officer at LPL Financial, likes the outlook for global stocks next year.
The pan-European STOXX 600 and the Nikkei closed lower, while the Dow, S&P 500 and Nasdaq turned lower during trading. The Shanghai Composite ended higher for day.