The credit-card giant is upgrading offices and outfitting workspaces with new technology to help manage the shift.
Goldman Sachs reported record-high annual expenses fueled by soaring compensation and benefits costs.
Office workers who don't get vaccinated by Jan. 14 will face termination, the firm said.
The move applies to offices in New York City and Jersey City, New Jersey.
Just over one-quarter of the city's 1 million office workers are back at their desks on an average weekday.
Citigroup is the first major Wall Street bank to make the vaccine a condition of employment.
In a post-pandemic world full of drive-through and delivery, the car makes for a likely payments platform.
Jamie Dimon's stark warning came at a meeting between the White House and bank CEOs.
Wall Street's return to the office is bringing with it confusion, anxiety and even puppies.
Fewer than 30% of financial-services workers in Manhattan have returned to their offices.