Companies are quietly and gradually moving their pension funds out of stocks. They want to reduce their investment risk and are buying more long-term bonds.

But states and other bodies of government are seeking higher returns for their pension funds, to make up for ground lost in the last couple of years and to pay all the benefits promised to present and future retirees. Higher returns come with more risk.

“In effect, they’re going to Las Vegas,” said Frederick E. Rowe, a Dallas investor and the former chairman of the Texas Pension Review Board, which oversees public plans in that state. “Double up to catch up.”

Though they generally say that their strategies are aimed at diversification and are not riskier, public pension funds are trying a wide range of investments: commodity futures, junk bonds, foreign stocks, deeply discounted mortgage-backed securities and margin investing. And some states that previously shunned hedge funds are trying them now.

If the crash of the market wasn't enough to endanger pension funds, now, the pressure to recoup may ignite a double hit on the retirement of millions of Americans.