https://www.siliconvalley.com/2020/10/14/silicon-valley-office-market-real-estate-post-coronavirus-economy-tech/ > SAN JOSE — Big tech companies that filled up large office buildings have helped to stabilize the Silicon Valley office market despite the coronavirus, but ongoing economic upheaval has caused sublease space to swell, a new report shows. > Preleases of a number of Silicon Valley office buildings by tech companies ensured that the sites were full when their construction was completed, according to a report for the third quarter from Colliers International, a commercial real estate firm.