For the reasons hereinafter enumerated, transactions in securities as commonly conducted upon securities exchanges and over-the-counter markets are effected with a national public interest which makes it necessary to provide for regulation and control of such transactions and of practices and matters related thereto, including transactions by officers, directors, and principal security holders, to require appropriate reports, to remove impediments to and perfect the mechanisms of a national market system for securities and a national system for the clearance and settlement of securities transactions and the safeguarding of securities and funds related thereto, and to impose requirements necessary to make such regulation and control reasonably complete and effective, in order to protect interstate commerce, the national credit, the Federal taxing power, to protect and make more effective the national banking system and Federal Reserve System, and to insure the maintenance of fair and honest markets in such transactions:

(1) Such transactions (a) are carried on in large volume by the public generally and in large part originate outside the States in which the exchanges and over-the-counter markets are located and/or are effected by means of the mails and instrumentalities of interstate commerce; (b) constitute an important part of the current of interstate commerce; (c) involve in large part the securities of issuers engaged in interstate commerce; (d) involve the use of credit, directly affect the financing of trade, industry, and transportation in interstate commerce, and directly affect and influence the volume of interstate commerce; and affect the national credit.

(2) The prices established and offered in such transactions are generally disseminated and quoted throughout the United States and foreign countries and constitute a basis for determining and establishing the prices at which securities are bought and sold, the amount of certain taxes owing to the United States and to the several States by owners, buyers, and sellers of securities, and the value of collateral for bank loans.

(3) Frequently the prices of securities on such exchanges and markets are susceptible to manipulation and control, and the dissemination of such prices gives rise to excessive speculation, resulting in sudden and unreasonable fluctuations in the prices of securities which (a) cause alternately unreasonable expansion and unreasonable contraction of the volume of credit available for trade, transportation, and industry in interstate commerce, (b) hinder the proper appraisal of the value of securities and thus prevent a fair calculation of taxes owing to the United States and to the several States by owners, buyers, and sellers of securities, and (c) prevent the fair valuation of collateral for bank loans and/or obstruct the effective operation of the national banking system and Federal Reserve System.

(4) National emergencies, which produce widespread unemployment and the dislocation of trade, transportation, and industry, and which burden interstate commerce and adversely affect the general welfare, are precipitated, intensified, and prolonged by manipulation and sudden and unreasonable fluctuations of security prices and by excessive speculation on such exchanges and markets, and to meet such emergencies the Federal Government is put to such great expense as to burden the national credit.