U.S. millionaires see real estate as the top alternative-asset class to own this year, according to Morgan Stanley.

About 77 percent of investors with at least $1 million in assets own real estate, according to a survey released last week by the New York-based investment bank’s wealth-management unit. Direct ownership of residential and commercial properties was the No. 1 alternative-investment pick for 2014, with a third of millionaires surveyed saying they plan to buy this year. Twenty-three percent said they expect to invest in real estate investment trusts, the second-most popular choice.