A Threshold Security is defined by Rule 203(c)(6) of the SEC's Regulation SHO as any equity security of an issuer that is registered under Section 12, or that is required to file reports pursuant to Section 15(d) of the Exchange Act where for five consecutive settlement days: (1) there are aggregate fails to deliver at a registered clearing agency of 10,000 shares or more per security; (2) the level of fails is equal to at least one-half of one percent of the issuer's total shares outstanding; and (3) the security is included on a list published by a self regulatory organization.

Reg SHO is designed to fulfill several objectives, including: (a) the establishment of uniform locate and delivery requirements in order to address problems associated with failures to deliver, and (b) the creation of uniform marking requirements for sales of all equity securities.

Accordingly NYSE Arca will post a list of threshold securities on this site for every settlement day. Note: The Threshold List will not be generated on bank holidays when the Depository Trust & Clearing Corporation is closed but equity exchanges are open.