US billionaires have increased their net worth by $485 billion during the last 10 weeks of the pandemic, report says

· US billionaires added almost half a trillion dollars to their collective wealth during the past 10 weeks, a report by the Institute for Policy Studies claims.
· US billionaires were worth a collective $3.439 trillion as of May 28, up $485 billion from March 18.
· Jeff Bezos, founder and chief executive of Amazon and Mark...