As stocks in the U.S. have been hitting all-time highs, some are wondering if there is a major correction coming.
"Despite the recent emerging market stock rebound, EM equities were still trading at a 36% discount to U.S. stocks, and below their three-year average valuation, as of October 10, 2013, as measured by price-to-book ratios," says Koesterich.
Earlier this year, BlackRock's Jeff Shen and Rodolfo Martell argued that "for investors who want to develop their portfolios, the developing world is an unmatched source of potential."
Koesterich likes emerging market stocks over the next three to five years.