If the required reserve ratio is 10 percent, monetary base is $480.80 billion, checkable deposits are $800 billion, and excess reserves total $0.8 billion, then the currency ratio is a. 0.25 b. 0.50 0.05 d. 0.40 The Open Market operations of the Federal Reserve Bank is one of the three conventional monetary tools. The purpose of open market selling is A. Stimulating the economy B. Holding the economy at the current level C. The fed doesn't need assets D. Preventing the economy overheated