June 11, 1996 Dear Mr. Katz: I am writing to apprise you of recent research that bears on the proposed new Regulation M (File No. S7-11-96). With regard to proposed Rule 105, the June 1996 issue of the Journal of Finance contains an article co-authored by me entitled "An Empirical Investigation of Short-Selling Activity Prior to Seasoned Equity Offerings." Among other things, we find (Table II) that the most aggressive short selling occurs in the five days prior to the pricing of the offering. On the other hand, we also find short interest to be in excess of twice its "normal" level as far as 18 days in advance of pricing. We also report evidence of a shift from direct short selling to "synthetic" short selling through options transactions following the adoption of Rule 10b-21 (Figure 1). In other words, it appears that where listed options exist, Rule 10b-21 has been circumvented. I have also co-authored a paper that is forthcoming in the Journal of Financial Economics entitled "Price Stabilization as a Bonding Mechanism in New Equity Issues" that addresses several questions related to proposed Rule 104. With regard to Q60 (Should penalty bids be prohibited...?), we provide an economic rationale for the use of penalty bids in conjunction with price stabilization provided that the underwriter's stabilization activities are transparent to the market at large. Our concern here lies not in the apparent fact that retail investors bear the burden of penalty bids. We believe that it is economically efficient for underwriters to favor institutional investors in both the allocation and stabilization of IPOs. Our analysis suggests that the cost of the stabilization efforts will ultimately be borne (on average) by issuing firms (through the fees they pay underwriters) if the underwriter's stabilization activities are known to the market. If this is not the case, it may be possible for the underwriter to shift the burden of the stabilization effort to secondary market investors by selling repurchased shares at a premium over their true value. Presumably, this problem is addressed by the requirement that an underwriter's stabilizing bid price be designated as such. If, however, this feature of the market is not transparent to retail investors, it appears plausible that both the underwriter and retail investors are unwitting partners to a manipulative trading practice. Thus, our analysis would support any effort to promote transparency/disclosure of the stabilization and penalty bid activities. I have provided an earlier draft of this paper to Blair Corkran. We have also written a non-technical summary of our research on book-building and stabilization practices entitled "Initial Public Offerings: Going by the Book" that will appear in the Winter issue of the Journal of Applied Corporate Finance. I have also provided Mr. Corkran with a previous draft of this paper. I would be happy to provide current drafts of any or all of these papers to interested parties or discuss our findings at greater length with members of your staff. William J. Wilhelm, Jr. Associate Professor of Finance Wallace E. Carroll School of Management Boston College Chestnut Hill, MA 02167