diagrams. The numbers in parentheses after the AD 1, AD 2, and AD 3 labels indicate the levels of investment spending associated with each curve. All figures are in billions. Which of the following would shift the money supply curve from MS 1 to MS 3? an increase in the discount rate sales of U.S. securities by the Fed in the open market purchases of U.S. securities by the Fed in the open market an increase in the reserve ratio