Alex Rosenberg is a producer at CNBC, where he serves as the digital writer and editor for "Trading Nation," "Futures Now" and "Options Action." Prior to joining CNBC, Rosenberg was a member of NBCUniversal's Page Program. He has a bachelor's degree from Brown University, and he is a CFA charterholder.
You generally need two numbers to value a stock: An earnings estimate and an earnings multiple. For Chipotle, each of those is now a complete mystery.
Stocks are set to fall 7 percent in the first quarter of 2016, according to Oppenheimer technical analyst Ari Wald. Here's why.
The case for investing in one of 2015's worst-performing markets.