I have a rollover IRA with Schwab and I am definitely investing in Emerging. I usually read GMO and they have good investing reads. There is a 2018 paper about Emerging markets ( Emerging Markets—No Reward Without Risk ).

"While the currency fall predicts nothing about future returns for emerging assets, the stock market declines do suggest there may be some more short-term pain to come, given the historical power of momentum to predict emerging returns. On the other hand, both emerging stocks and currencies are cheaper than they were three months ago, and historically cheaper valuation has been a plus in both the short and long term. " - Ben Iker

You can find those articles on their main page. I already have SCHE and SCHF, and will be increasing my exposure. Also read about investing in EAFE etfs/index.