Berkshire will miss Buffett’s “clout,” said one analyst, as the company lost about $30 billion in market value following the Oracle of Omaha’s retirement announcement.

"You're losing one of the most esteemed investors one could argue of all time," a source said of investors' reaction to Buffett's plan to step down.

B shares slid 4.1% in the first trading session since legendary investor Warren Buffett stunned shareholders on Saturday with the announcement that he plans to step down as CEO at the end of the year,