The new provision could also help address what has been called a “silver tsunami” of retiring Baby Boomer business owners. Much has been made of what that generation’s departure from the workforce will mean — a loss of institutional knowledge, a shift in the job market and a drain on Social Security. But less attention has been paid to the wave of retiring Boomers who own closely held private businesses. They will need to sell their companies, transition them to a new generation of owners — or risk shutting them down, cutting jobs in the process.