Investors are aggressively piling back into markets shunned as too risky just a few weeks ago -- driving up stocks in the developing world and raising concerns that the euphoria may be overdone.

• 资者正纷纷大举重回几周前还被视为风险过高而对其退避三舍的市场，进而推高了发展中国家的股市，也引发了对乐观情绪可能过头的担忧。