Of the roughly $4 trillion in assets managed by public pension funds in the United States, more than two-thirds are allocated to risky investments like equities, and alternative vehicles, including private equity, real estate, and hedge funds, according to Pew research. That means retirement systems' ability to meet their commitments are subject to stock market swings. * "It's like the gambler who's on a losing streak but keeps betting in the hope of making up some of the losse...