(Bloomberg) --Returns for ultra-high-net-worth investors such as wealthy families may be poised to decline, according to a new report by KKR & Co. Gains could fall to 5.3 percent from 9.3 percent historically “unless portfolios are repositioned for the environment we think that we are entering,” wrote the authors, including Henry McVey, KKR’s head of global macro and asset allocation. “Ultra HNW investors must find new opportunities to harness complexity and dislocation to their benefit, allowing them to earn better returns than what typical indexes may deliver during the next five years.” The New York-based investment firm surveyed more than...