That’s the biggest finding in an updated assessment of the president’s net worth, which has slipped to $2.9 billion, according to the Bloomberg Billionaires Index, down from $3 billion a year ago. The calculation, five months after Trump’s inauguration, relies on figures compiled from lenders, mortgage documents, annual reports, market data and a new financial disclosure released June 16.

The decrease is driven mostly by a drop in the value of three office properties in Manhattan, where financial data compiled by Trump’s lenders offer a consistent picture: They’re underperforming appraisals conducted when Trump was issued loans. The buildings — 40 Wall Street, Trump Tower, and 1290 Avenue of the Americas, a tower in which Trump holds a 30 percent stake — are victims of a changing New York office market, where gleaming new skyscrapers are attracting tenants and demand for space in vintage properties is falling.