RANDALL S. THOMAS [*] JAMES F. COTTER [**] I INTRODUCTION In November 1998, the Securities and Exchange Commission (SEC) proposed a modification to the federal securities law disclosure requirements to facilitate the process of issuing new securities. In a massive document, nicknamed the Aircraft Carrier, [1] the SEC sought public comments on a variety of proposed changes to the federal securities laws that were designed to minimize the cost and delays associated with issuing securities, while continuing to provide the public with the information that it needed to make investment decisions. Although the public comment period on these proposals has passed without any apparent action by the SEC, the policy questions raised by the Aircraft Carrier continue to be important ones. This article addresses one of the key issues that the Aircraft Carrier raised: How can we determine when companies should be able to issue simplified disclosure documents? In this proposed regulatory regime, the SEC suggested the use of a simplified registration statement, Form B, for larger, more experienced issuers, while other companies would continue to make traditional extensive disclosures using Form A whenever they sell securities to the public. [2] The SEC's proposal would have limited Form B disclosure to firms who had a public float greater than $250 million, or had a combination of $75 million in public float and average daily trading volume (ADTV) greater than $1 million. [3] Similar to the way that the short form and shelf registration systems introduced by the SEC in the early 1980s allowed companies to take their securities to market more efficiently and quickly, the proposed Form B disclosure rules were intended to decrease the amount of time and to lower the cost associated with selling a company's securities. The theoretical basis for permitting simplified disclosure for some companies, but not for others, rests on the efficient capital markets hypothesis. This theory postulates that the market for a company's securities can be said to be efficient if, for a specific set of information, the security's market price is the same as it would be if all investors possessed this information. [4] Securities that trade in efficient markets have rapid price adjustments to new information, whereas those in inefficient markets do not. Today, it is well accepted that the efficient capital markets hypothesis constitutes the theoretical underpinning for the federal securities laws disclos ure policy. [5] The SEC's premise in the Aircraft Carrier proposals was that companies whose shares are traded in an efficient capital market should be permitted to file simplified registration statements that incorporate by reference many of their other federal securities law filings. [6] While we agree with this fundamental premise, we believe that the regulatory criteria that the SEC proposed for issuers to be eligible to file on the new Form B failed to capture market efficiency adequately. In this article, we argue that the SEC's study of the underlying factors that lead to capital market efficiency--which uses following for a company's stock as a proxy for market efficiency--employed too broad a definition of what constitutes an analyst for purposes of measuring market efficiency. We also believe that the SEC failed to consider other important available proxies for market efficiency, particularly the level of institutional investors' stock ownership in these companies. When we adjust the definition of to reflect more accurately only those analysts whose research effectively disseminates information to investors in the market, we find that the proposed numerical cutoffs for the use of Form B were set much too low. This conclusion is confirmed when we examine the distribution of institutional investor stock ownership in American companies, and reach the same result. …