Two of San Francisco's biggest hotels, Hilton Union Square and Parc 55, have lost $1 billion in value as the city’s critical tourism sector continues a slow recovery, according to a new report.

For generations, a shopping trip to Union Square was a Christmas tradition. But with recent seismic shifts in the retail economy, they're having to find unique ways to attract people to the area.

Low demand for big-box retail may mean the chain will need to offer seller financing or delayed sale of 170 O’Farrell Street.