His model portfolio, consisting of 13 biotech stocks, is up 30 percent so far this year.

The firm's model global portfolio has increased its holdings in Japan to 18 percent of the total from 14 percent.

Four of his six model portfolios contain funds from these groups.

Her firm was recommending that 70 percent of a model portfolio be in stocks.

The rest buy model portfolios and stick with them entirely, he said.

The professors say they were startled by this model portfolio's large and consistent returns over the 23 years.

His firm gives stocks a 55 percent weighting in its model portfolio.

Q. Has the rise in interest rates caused you to alter your model portfolio?

Our model portfolios do have a significant representation in cash equivalents, about 30 percent.

He recently lightened the European stock component of his model portfolio.