RT Article T1 The Challenges of Detection and Enforcement of Insider Trading JF Journal of business ethics VO 153 IS 2 SP 375 OP 388 A1 Adams, Brian J. A1 Perry, Tod A1 Mahoney, Colin LA English PB Springer Science + Business Media B. V YR 2018 UL https://www.ixtheo.de/Record/1785666789 AB Trading on non-public material information is fertile ground for a discussion of ethical behavior. The long-running legal tug-of-war over what constitutes illegal insider trading delivers challenges to regulatory authorities charged with detecting and enforcing the law, and is likely one of the reasons that prosecution of insider trading events remains rather uncommon. One can observe both increased volume in the equity and option markets and run-ups in the stock price prior to the announcement of the acquisitions; however, the detection of illegal or unethical insider trading can be difficult. Given the legal uncertainty around insider trading and the circumstantial evidence from the trading activity, it is almost impossible to identify unethical insider trades unless there is a whistleblower or trades are large in size and impeccable in timing. Using call option trading around two merger announcements with similar firms that resulted in different ultimate treatment from the SEC, we illustrate the struggle regulators and prosecutors have with identifying and enforcing unethical insider trades. K1 Securities law K1 Mergers K1 Ethics K1 Insider trading K1 Accounting and finance DO 10.1007/s10551-016-3403-4