On top of the challenges of investing in low-information markets, those risks can potentially derail certain emerging market strategies. Passive funds, for example, must follow strict rules that can make foreign markets particularly bumpy. If, for example, a passive fund must have a certain allocation to small- or large-caps, and events take a toll on either segment more than the other, such passive funds can struggle. Looking at emerging market investing options? Ex-U.S. equities — emerging markets include ...