 CLEVELAND--BUSINESS WIRE--CBIZ, Inc. NYSE: CBZ, a leading provider of financial, insurance and advisory services, has released the Q2 2021 CBIZ Main Street Index to quantify the recovery of the small and mid-sized business SMB marketplace from the COVID-19 pandemic. The findings reveal that business owners are increasingly confident and the number of businesses reporting revenue growth has doubled, despite heightened challenges around reaching maximum staffing levels. The survey, which wa 