The combined M2 money supply of the United States and China reached a record $76.4 trillion in August after rising $7.9 trillion year over year. China accounted for $53.1 trillion, while the United States contributed $23.3 trillion; both figures were reported at all-time highs. The combined measure has more than doubled over the last 10 years. M2 is a broad money-supply measure that generally includes cash, checking deposits and certain savings deposits.