Md. Code, Commercial Law § 1–204

Except as otherwise provided in §§ 3–303, 4–208, and 4–209 of this article, a person gives value for rights if the person acquires them:

(1) In return for a binding commitment to extend credit or for the extension of immediately available credit, whether or not drawn upon and whether or not a charge–back is provided for in the event of difficulties in collection;

(2) As security for, or in total or partial satisfaction of, a preexisting claim;

(3) By accepting delivery under a preexisting contract for purchase; or

(4) In return for any consideration sufficient to support a simple contract.