42 CFR § 411.356 - Exceptions to the referral prohibition related to ownership or investment interests.
(a) Publicly traded securities. Ownership of investment securities (including shares or bonds, debentures, notes, or other debt instruments) that at the time the DHS referral was made could be purchased on the open market and that meet the requirements of paragraphs (a)(1) and (2) of this section.
(1) They are either -
(i) Listed for trading on the New York Stock Exchange, the American Stock Exchange, or any regional exchange in which quotations are published on a daily basis, or foreign securities listed on a recognized foreign, national, or regional exchange in which quotations are published on a daily basis;
(ii) Traded under an automated interdealer quotation system operated by the National Association of Securities Dealers; or
(iii) Listed for trading on an electronic stock market or over-the-counter quotation system in which quotations are published on a daily basis and trades are standardized and publicly transparent.
(2) They are in a corporation that had stockholder equity exceeding $75 million at the end of the corporation's most recent fiscal year or on average during the previous 3 fiscal years. “Stockholder equity” is the difference in value between a corporation's total assets and total liabilities.
(b) Mutual funds. Ownership of shares in a regulated investment company as defined in section 851(a) of the Internal Revenue Code of 1986, if the company had, at the end of its most recent fiscal year, or on average during the previous 3 fiscal years, total assets exceeding $75 million.
(c) Specific providers. Ownership or investment interest in the following entities, for purposes of the services specified:
(1) A rural provider, in the case of DHS furnished in a rural area (as defined at § 411.351 of this part) by the provider. A “rural provider” is an entity that furnishes substantially all (not less than 75 percent) of the DHS that it furnishes to residents of a rural area and, for the 18-month period beginning on December 8, 2003 (or such other period as Congress may specify), is not a specialty hospital, and in the case where the entity is a hospital, the hospital meets the requirements of § 411.362 no later than September 23, 2011.