Economic Definition of reserve ratio. Defined.
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Term reserve ratio Definition: The amount of reserves required by the Federal Reserve System as a ratio of the amount deposits backed by the reserves. Modern reserve ratios are in the range of 1-3% for checkable deposits. The reserve ratio plays a key role in the deposit multiplier. The simple deposit multiplier is simply the inverse of the reserve ratio. If the reserve ratio is 5%, then the deposit multiplier is 20. It's just that simple.