"An investor should move to cash and cash alternatives," he advised.
Its managers are debating whether it's time to move away from so-called secular growth companies.
For the second time this year, trading has exploded on the nation's exchanges.
Unlike gold or silver, a primary source of demand for palladium is from industry.
David Hunt, CEO of Prudential Investment Management, also said investors should guard against excessive optimism after voters selected Donald Trump as president.