• Assets: $1.27 trillion

Notable Investments: Japan's colossal pension investment fund, which manages money on behalf of the nation's retirees, has largely missed out on the global bull market, including the rapid rise of its own country's stock market. That's because the fund has over half its money in its own domestic bonds, which offer meager yields.

But that's all about to change. Japanese officials have recently said they plan to boost their holdings of Japanese and foreign stocks in an attempt to capture bigger gains and ensure promised payouts their retired citizens.

NEXT: Norway's Government Pension Fund