Shares of jewelry retailers closed mostly lower Friday, ending a week focused on softening U.S. consumer spending and a trademark court case.

Tiffany posted higher-than-expected quarterly profit Friday, boosted by strong sales in Europe, the Asia-Pacific region and to tourists at its Manhattan flagship store, and the U.S. jeweler raised its full-year outlook, pushing its shares up 4 percent.

As the Dow, Nasdaq and S&P open the trading week in negative territory, CNBC asked the pros how to keep your investments toward the upside.