Coinbase's trading volumes stood at $462 billion for the quarter ended June 30Coinbase Global Inc reported a more than 1,500 per cent jump in quarterly trading volumes on Tuesday, as the U.S cryptocurrency exchange consolidated its huge expansion at the start of this year and a surge in bitcoin trades continued well into the quarter.Coinbase's trading volumes stood at $462 billion for the quarter ended June 30, compared to $28 billion in the year-ago period.The crypto exchange posted a net income attributable to common shareholders of $1.59 billion, or $6.42 per share, for the quarter ended June 30.