Jeffrey F. Jaffe

• Jeffrey F. Jaffe and Anup Agrawal (1995), Does Section 166 Deter Insider Trading by Target Managers?, Journal of Financial Economics, 39 (Oct./Nov. 1995). 10.1016/0304-405X(95)00833-Z Abstract

  This paper examines empirically whether the short-swing rule (Section 16b of the Securities Exchange Act) deters managers from trading before mergers. Since a merger forces the sale of the target’s outstanding equity, insider purchases within six months before the merger cannot escape this rule. We examine the 1941–1961 period when no other insider trading laws were enforced. Consistent with 16b’s deterrent effect, managers’ purchases drop significantly before the announcement. Before completion, the decrease occurs only in the 1941–1955 period. Surprisingly, pre-announcement sales do not decline, even though 16b cannot punish deferral of planned sales.

• Jeffrey F. Jaffe, R. Westerfield, D. Keim (1989), Earnings Yields, Market Values and Stock Returns, Journal of Finance, 44.1 (March 1989). Abstract

  Earlier evidence concerning the relation between stock returns and the effects of size and earnings to price ratio (E/P) is not clear-cut. This paper re-examines these two effects with (a) a substantially longer sample period, 1951-1986, (b) data that are reasonably free of survivor biases, (c) both portfolio and seemingly unrelated regression tests, and (d) an emphasis on the important differences between January and other months. Over the entire period, the earnings yield effect is significant in both January and the other eleven months. Conversely, the size effect is significantly negative only in January. We also find evidence of consistently high returns for firms of all sizes with negative earnings.

• Jeffrey F. Jaffe, Donald B. Keim, R. Westerfield (1989), Earnings Yields, Market Values, and Stock Returns, Journal of Finance.

Past Courses

• FNCE1000 - Corporate Finance

  This course provides an introduction to the theory, the methods, and the concerns of corporate finance. The concepts developed in FNCE 1000 form the foundation for all elective finance courses. The main topics include: 1) the time value of money and capital budgeting techniques; 2) uncertainty and the trade-off between risk and return; 3) security market efficiency; 4) optimal capital structure, and 5) dividend policy decisions. ACCT 1010 + STAT 1010 may be taken concurrently.

Knowledge @ Wharton

• Summer Reading: Wharton Faculty Picks, Knowledge @ Wharton - 07/23/2024
• What Does Your Writing Style Say About You?, Knowledge @ Wharton - 07/23/2024
• How to Align Private Equity Motives with Nursing Home Outcomes, Knowledge @ Wharton - 07/22/2024
• Baby Bust | Stewart Friedman, Knowledge @ Wharton - 07/16/2024
• Why Are Private Equity Firms Buying Mental Health Clinics?, Knowledge @ Wharton - 07/15/2024
• Who Benefits in the Deal Between Reddit and OpenAI?, Knowledge @ Wharton - 07/15/2024
• How Behavioral Factors Shape Retirement Wealth, Knowledge @ Wharton - 07/15/2024
• Stocks for the Long Run | Jeremy Siegel, Knowledge @ Wharton - 07/09/2024
• This Media Bias Detector Analyzes News Reports in Real Time, Knowledge @ Wharton - 07/09/2024
• Are Corporate Human Rights Practices Up to Par?, Knowledge @ Wharton - 07/08/2024