Alternatives can add yield to a portfolio, but these assets also come with risk. Still, many advisers think these investments are worthwhile. More than 75% of institutional investors see alternative investments as essential to diversification, according to studies, with 72% believing that the typical mix of 60% stocks and 40% bonds is no longer an efficient way to achieve returns. Myths about alternative investments include the idea that a 60/40 stock/bond portfolio has low volatility, one expert says. In addition, the term "uncorrelated" can be misleading.