Zero Percent Certificate of Indebtedness as an investment

In what investment situations would you use the Zero Percent Certificate of Indebtedness (C of I) account in Treasury Direct?

Tom's response

The Zero Percent C of I isn't meant as an investment, but just as a temporary holding area for money you have deposited into your TreasuryDirect account.

You can move money into a C of I by selecting that option when redeeming a TreasuryDirect security, by scheduled deposits from a payroll savings plan or other type of scheduled investment, or by making a transfer from your bank account.

You can move money out of a C of I by buying a Savings Bond or making a transfer to your bank account.