Commercial Real Estate Crisis Looms as Vacancies Rise and Rents Plummet

Commercial real estate, especially office space, faces crisis - rents way down, vacancies way up.

Owners can't pay mortgages, banks at risk, reminiscent of 2008 crash.

San Francisco hit hard - downtown vacancies highest in U.S.

Small, community banks less exposed than big lenders to commercial real estate.

Fed Chair says larger banks have "manageable" exposure, but smaller banks face challenges.