His comments followed prepared remarks from Fed Vice Chairman Stanley Fischer, in which he said the Fed's policy-making committee would consider rate hikes in upcoming meetings. Gross noted there was "not much difference" in the sentiment from the Fed's recent dovish tones.
Read MoreFed's Fischer: Will consider rate hikes soon
He also expanded on why the Fed would have a difficult time upholding market liquidity during a crisis, which he initially outlined Tuesday morning in his monthly note to investors. While the U.S. central bank became a "buyer of last resort" during the last financial crisis, it will not have the same leverage in a future "panic situation" due to regulations enacted since, Gross said.
"The market is depending on itself for future liquidity," he said.
He believes markets will have a rough time maintaining that liquidity. Gross said "butterfly wings," including Chinese markets and the fallout from the Greek debt crisis, have the potential to "disrupt" global markets.
Read MoreBill Gross: Here's what could trigger a 'run on the shadow banks'
He questioned liquidity in "shadow banking" systems, which include mutual funds, exchange-traded funds and private equity, among other institutions that lack government backing. Gross noted that levered ETFs that deal with high-yield bonds or bank loans are most vulnerable to liquidity leaving the markets.