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Mamdani made Ken Griffin a target — and cemented NYC’s death spiral

Reported by New York Post
Apr 23, 2026· 3 min read
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Key Takeaways
  • • NYC Mayor Zohran Mamdani announced the city's first-ever pied-à-terre tax alongside Governor Kathy Hochul, a surcharge on properties valued above $5 million when the owner's primary residence is outside New York City, projected to generate $500 million annually.
  • • Mayor Mamdani publicly targeted billionaire hedge fund manager Ken Griffin's $238 million Manhattan penthouse in a viral video promoting the tax, prompting Citadel's leadership to characterize the action as "shameful" and demonstrating "ignorance and disdain" toward major contributors to the city.
  • • The tax policy reflects a broader competitive disadvantage for New York relative to states like Florida, which have attracted high-net-worth individuals and their businesses by maintaining lower tax environments, according to commentary citing state migration patterns.
  • • Critics argue the pied-à-terre tax exemplifies a counterproductive fiscal cycle: taxing wealthy residents and businesses at elevated rates incentivizes relocation, shrinking the tax base and creating budget deficits that prompt further tax increases on remaining residents.
  • • The policy signals escalating political risk for the hedge fund and financial services industry concentrated in New York City, potentially accelerating wealth and business relocation to lower-tax jurisdictions.
Summary
New York City Mayor Zohran Mamdani and Governor Kathy Hochul announced the state's first pied-à-terre tax this month, targeting luxury property owners whose primary residences are located outside New York City. The tax applies to residential properties valued above $5 million and is projected to generate $500 million annually. Mamdani publicly promoted the policy by filming a video outside billionaire hedge fund manager Ken Griffin's Manhattan penthouse, a $238 million property, explicitly celebrating the tax as a measure to address wealth inequality.

The public targeting of Griffin triggered a sharp response from Citadel leadership. The firm's chief operating officer Gerald Beeson issued a memo characterizing Mamdani's approach as "shameful" and accusing city officials of demonstrating "ignorance and disdain" toward major economic contributors and philanthropic donors to New York City. The incident underscores heightened political risk for the financial services industry, particularly hedge funds and wealth management firms concentrated in Manhattan.

The broader policy debate reflects a structural competitive disadvantage for New York in the interstate competition for high-net-worth individuals and businesses. Commentary notes that Florida has systematically benefited from New York's aggressive tax policies, attracting residents, companies, employees, and associated tax revenues from the Empire State. Critics contend that the pied-à-terre tax follows a cyclical pattern: elevated tax burdens on wealthy residents and businesses incentivize relocation, reducing the tax base and forcing municipalities to increase taxes on remaining residents, thereby accelerating further departures and widening budget deficits.

The policy's revenue projections assume sustained ownership of targeted properties, a assumption that may face pressure if wealthy individuals determine that holding secondary Manhattan real estate no longer justifies annual tax obligations in a jurisdiction they perceive as hostile. This dynamic represents a strategic vulnerability for New York's tax base and signals intensifying political headwinds for the institutional investment and hedge fund sectors headquartered in the city.

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Sources

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New York Post Mamdani made Ken Griffin a target — and cemented NYC’s death spiral