Investors have a few options to keep their portfolio's growing in what could be a slow-growth 2019. 

Facebook

Facebook Inc. (FB) is likely a longer-term play, but beware. It could see more volatility, as it will take a while to put data and security issues and regulation concerns to bed. Still, "The core business, though, is still a pretty strong business overall," said JJ Kinahan, chief market strategist at TD Ameritrade.  

Apple

"This is one that you're really going to have to evaluate your time frame," Kinahan said. Apple In. (AAPL) is discounting some devices, as demand for new models is falling. And Apple won't release its 5G phone until 2020, while Samsung and Verizon will, which Davidson & Co. analyst Tom Forte did say that could indicate Apple wants to wait until it can produce a premium version. There might be some volatility, but "they have a very good management team, their services business has been growing pretty significantly," Kinahan said. Nibbling at shares instead of buying a huge position also helps mitigate risk.

Retail

"The consumer has proven to be incredibly healthy," Kinahan said. While some expect consumer spending to slow down in 2019, some still think the consumer has some more life left for a while longer. But here's the rub: "There is no sector in the market that is more individually name-driven than retail," said Kinahan. "Kohl's (KSS) , Walmart (WMT) and Target (TGT) are really interesting to me," he said, because the differentiation is low, so the names that show strong same-store-sales comparables could be the real winners. 

Consumer Staples 

The defensive plays could be in Procter & Gamble Co. (PG) , Coca-Cola Co. (KO) and PepsiCo Inc. (PEP) . "Those three stocks performed really well during that bad market," Kinahan said. They have "very consistent earnings, very consistent product and very consistent dividends." 

Banks 

Goldman Sachs Group Inc. (GS) is down 25% this year. Citigroup Inc. (C) is down 15% this year. Ultimately, the yield curve will have to steepen. 

AAPL, FB, KSS, GS, and C are holdings in Jim Cramer's Action Alerts PLUS member club . Want to be alerted before Jim Cramer buys or sells those? Learn more now. 

More from Investing

Facebook's Search Test Is a Reminder of its Untapped Revenue Potential

Facebook's Search Test Is a Reminder of its Untapped Revenue Potential

It Was a Confusing and Chaotic Day

It Was a Confusing and Chaotic Day

Chart of the Day: McDonald's Management Maneuvers Amid Taxes, Tariffs

Chart of the Day: McDonald's Management Maneuvers Amid Taxes, Tariffs

Market Madness: This Market Is for Stock Pickers

Market Madness: This Market Is for Stock Pickers

Jim Cramer: The Operative Term for This Tape Is Treacherous

Jim Cramer: The Operative Term for This Tape Is Treacherous