Gross said that the Federal Reserve may become more "dovish" after oil price drop and would have to take lower prices "into consideration."

If he would to give advice to Stanley Fischer, Gross said, "the Fed as the central banker of the world basically has to worry about financial conditions not just in the United States but the world. And so next week in terms of their language and their stance going forward, they should be very cautious about any type of tightening indications."

Gross also told Keene:

Fed must adjust to drop in oil price

'New natural' interest rate is 'zero percent or lower'

Very little liquidity in corporate bonds