Go for timber, oil and gas

So he advocates another approach, which he outlined in the book “Unconventional Success: A Fundamental Approach to Personal Investment” (Free Press, 2005). He proposes a portfolio of 30 percent domestic stocks, 15 percent foreign stocks, and 5 percent emerging-market stocks, as well as 20 percent in real estate and 15 percent each in Treasury bonds and Treasury inflation-protected securities, or TIPS.

The real estate investment can be made through real estate index funds. Though the real estate market has declined and your portfolio is below its target allocation to it, he said, don’t try to time the market. Go ahead and rebalance because no one really knows where the market’s bottom is.

Diversification will buffer a portfolio from declines in specific asset classes. For example, he said: “If the dollar declines dramatically, you have foreign and emerging-market equities. And a declining dollar may well be associated with inflation, but a diversified portfolio would include TIPS,” to provide a hedge. “That means if any of these scenarios play out, an investor has sizable chunks of his portfolio that protect against them,” Mr. Swensen said.

When possible, he said, rebalancing should be done in a tax-sheltered account, like an I.R.A. or a 401(k), to avoid tax liabilities. “When you are putting fresh money to work,” he said, “you put it in an asset class where you are underweight and take money out of a class that is overweight.”

He says it is fruitless for individual investors to pick stocks. “There is no way that an individual can go out there and compete with all these highly qualified and compensated professionals,” Mr. Swensen said.

HE criticized the approach of Jim Cramer, the CNBC host, who encourages investors to trade stocks in strategies that Mr. Swensen says cost heavily in commissions and taxes.

“There is nothing that Cramer says that can help people make intelligent decisions,” Mr. Swensen said. “He takes something that is very serious and turns it into a game. If you want to have fun, go to Disney World.”

Brian Steel, a spokesman for CNBC, responding on behalf of Mr. Cramer, said Mr. Cramer “had a long history of success as a trader and fund manager.” He added that Mr. Cramer is a proponent of long-term investing and thorough research.

Mr. Swensen says investors should forget market timing entirely. Once an individual sets up a program, it should be rebalanced quarterly or semiannually, he said, “but it should be disciplined.”

-Keep It Simple, Says Yale’s Top Investor