Mass. Gen. Laws ch. 106, § 9-108
(b) Examples of reasonable identification. Except as otherwise provided in subsection (d), a description of collateral reasonably identifies the collateral if it identifies the collateral by:
(d) Investment property. Except as otherwise provided in subsection (e), a description of a security entitlement, securities account, or commodity account is sufficient if it describes:
(e) When description by type insufficient. A description only by type of collateral defined in this chapter is an insufficient description of: