The CEO of the company managing the University of Virginia's endowment has asserted the stability of its investment strategies amid a global economic downturn. The open letter to the UVa community is the third issued by the University of Virginia Investment Management Co. in the last three weeks, but the first from company CEO Chris Brightman. ... Brightman noted that while the endowment pool lost $1 billion recently, it grew $1.6 billion between June 2005 and June 2008, leaving the pool $600 million ahead, or at roughly $4.1 billion overall.