We research all brands listed and may earn a fee from our partners. Research and financial considerations may influence how brands are displayed. Not all brands are included. Learn more.

Republican Presidential Candidate Donald Trump Campaigns In Florida Day After First Debate
Donald Trump's net worth fell $800 million over the past 12 months.
Spencer Platt—Getty Images

Donald Trump's elusive net worth fell $800 million from a year ago to $3.7 billion, according to Forbes, which has been tracking the Republican presidential candidate's assets for 34 years.

Forbes, which analyzed 28 assets or asset classes to produce the figure, pegs a "softening of New York City's real estate market" as the prime reason Trump's worth has fallen so dramatically. The iconic Trump Tower on Fifth Avenue in Manhattan lost $159 million in value over the past 12 months, the magazine calculates, while frequent campaign stop Mar-a-Lago, the private club in Palm Beach, reportedly declined $50 million in value.

Read Next: Donald Trump Would Be Billions Richer If He’d Invested in Index Funds

Properties that rose in value include 555 California, located in San Francisco, and NYC's Trump Parc/Trump Parc East.

Trump himself puts his net worth at $10 billion, not in actual holdings, but because that's what he estimates his "brand" is worth. To be more precise, Forbes does not assign a value to the "brand" of any of the billionaires it tracks. "Great businessmen turn brands into profits, which then get valued," reporters Chase Peterson-Withorn and Jennifer Wang write.

Read More: Yes, Donald Trump—You Actually Can Learn a Lot From Tax Returns

Earlier this year Forbes pegged the real estate exec's worth at $4.5 billion, as did another report. Bloomberg estimates the figure is closer to $2.9 billion. Forbes' latest report is lower than previous estimates because of the diminishing returns of real estate prices, as well as "new information" about his assets.