These instruments are created from the coupon or the actual principal of the underlying note or bond. Considered the next most secure investment after Treasury securities, most are not US Government guaranteed, but are chartered and supervised by the US Government. Typically these are investment arrangements involving the purchase of US Government and agency securities with a simultaneous agreement to resell them back to the same seller for the same dollar investment plus a fee. Amounts invested, rate, and terms are negotiable but such repurchase transactions are limited to 90 days maximum term.
Acceptances are available in various denominations.
Commercial paper is typically not very liquid though paper directly issued may be sold back to the issuer. For others, the secondary market is extremely limited. More active markets may be available for long-term notes and bonds. For these latter obligations, they are allowable subject to ORS 294.040. These are not a security but a deposit in a qualified financial institution.