1.1 引言 投资组合( P o r t f o l i o )管理的目的是：按照投资者的需求，选择各种各样的证券和其他资产 组成投资组合，然后管理这些投资组合，以实现投资的目标。投资者的需求往往是根据风险 （r i s k）来定义的，而投资组合管理者的任务则是在承担一定风险的条件下，使投资回报率 （r e t u r n）实现最大化
This was an emotional day. The ceremonies honoring the fortieth anniversary of D day became more than commemorations. They became celebrations of heroism and sacrifice. This place, Pointe du Hoc, in itself was moving and majestic. I stood there on that windswept point with the ocean behind me. Before me were the boys who forty years before had fought their way up f rom the ocean. Some rested under the white
This was an emotional day. The ceremonies honoring the fortieth anniversary of D day became more than commemorations. They became celebrations of heroism and sacrifice. This place, Pointe du Hoc, in itself was moving and majestic. I stood there on that windswept point with the ocean behind me. Before me were the boys who forty years before had fought their way up f rom the ocean. Some rested under the white crosses and Stars of David that stret
