.0 billion were more than offset by return of capital on opportunistic funds . market valuation gains contributed $ 1.1 billion to aum growth . hedge fund aum includes a variety of single-strategy , multi-strategy , and global macro , as well as portable alpha , distressed and opportunistic offerings . products include both open-end hedge funds and similar products , and closed-end funds created to take advantage of specific opportunities over a defined , often longer- term investment horizon