Stocks rose in January, but investors may not have the same luck in February. The Dow Jones Industrial Average rose 0.5% during the month, the S&P 500 gained 1.8%, while the tech-heavy Nasdaq added 4.3%. The best-performing S&P 500 sectors for the month were materials, information technology and consumer discretionary.
"The leaders in the market [such as FANG stocks] have started to roll over in the past couple of sessions," said TheStreet's Brian Sozzi. FANG stocks include Facebook (FB) - Get Report , Amazon (AMZN) - Get Report , Netflix (NFLX) - Get Report , and Alphabet (GOOGL) - Get Report .
Sozzi also pointed to building materials stocks such as Eagle Materials (EXP) - Get Report . "These stocks have led the market over the past six months, and they're starting to roll over. And that's a concern."