Endowments and foundations have turned to passive investments after hedge funds disappointed with high fees and poor performance. Now, the plan is to stay put for the next 12 months, according to a survey. More than 40 percent of business officers said they increased passive investment strategies in the past three years, according to the survey released June 5 by NEPC, a Boston-based consulting firm with 109 endowment and foundation clients with assets of $60 billion. More than 50 percent of 74 endowments and foundations questioned said they plan to maintain their strategy in the next year. NEPC polled business...