Warren became one of the most prominent political figures to show their support for Mamdani as some national Democrats have kept their distance.

The publicly traded property companies are a good barometer of how investors regard the prospect of a socialist mayor.

When Zohran Mamdani met last month with the city’s top businesspeople, he was pressed by Rob Speyer, CEO of real estate giant Tishman Speyer, to explain a glaring gap in his agenda: How would he ensure that his vow to freeze rents for New York’s 1 million stabilized apartments does not bankrupt the city’s growing number of distressed apartment buildings?