Saudi Arabia officially opened its stock market to foreign investment on Monday, in what’s being billed as a potential game changer for emerging markets investors. The country’s Capital Markets Authority finalized the rules for direct foreign investment in early May, although plans had been in the works for quite some time. Summarizing, qualified foreign investors (QFIs) are defined as institutions with at least $5 billion in AUM and five years of experience, no QFI can hold more than 5% of a single issue and no consortium of QFIs can hold 20% or more in a single stock.