Randy's answer is correct in 2017, but Reg. Z's concept of a "required deposit" has changed over the years. In the wonderful world of regulations, nothing is ever forgotten totally, so (like me) some of you might argue that this disclosure shouldn't include pre-existing CDs and other deposit accounts that are subsequently offered as collateral.
Before "simplification" in 1981, you would have been right. From my March 1977 copy of "old Reg. Z": "The following amounts shall be disclosed...any deposit balance...except a deposit balance or investment which was in existence prior to the extension of credit and which is offered by the customer as security for that extension of credit...."
Post-simplification, we would be wrong. Regardless of the history of the deposit, if the credit agreement calls for its ongoing existence, Section 1026.18(r) requires a disclosure that there is a "required deposit".
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...gone fishing.