(1) a security, including a revenue obligation or a separate security as defined in Rule 131 (17 C.F.R. 230.131) adopted under the Securities Act of 1933, issued, insured, or guaranteed by the United States; by a state; by a political subdivision of a state; by a public authority, agency, or instrumentality of one or more states; by a political subdivision of one or more states or by a person cont