Alfred P. Sloan Foundation, New York, is considering adding alternative investments on an opportunistic basis for diversification, said Joseph Bohrer, director of investments at the $1.4 billion foundation. Fund officials are interested in making "incremental investments in slightly less crowded areas," Mr.Bohrer said. "For example, take private equity - we'd be looking at international investments, possibly emerging markets. But it's a difficult period right now and it's probably a bit too early to do anything. Right now we're casting the net as wide as possible." He added that there is no time frame for action. He declined to give the fund's current alternatives allocation or how much it would add.