TY - JOUR T1 - Pre-Event Trading Based on Value Line’s Weekly Rank-Change Announcements JF - The Journal of Trading SP - 61 LP - 79 DO - 10.3905/jot.2016.11.3.061 VL - 11 IS - 3 AU - Ying Zhang AU - Hongfei Tang AU - Wikrom Prombutr AU - Steven V. Le Y1 - 2016/06/30 UR - https://pm-research.com/content/11/3/61.abstract N2 - This article investigates pre-event trading behaviors and investment returns surrounding Value Line’s weekly Timeliness rank-change announcements. The findings indicate that pre-event trading is accompanied by abnormal returns and volumes that are subject to rank changes. However, pre-event trading is not detected for stocks given Value Line Initial Reviews. Performance tests show that abnormal returns for pre-event trader portfolios are unexplained by a conventional four-factor asset-pricing model. Additional tests attest that pre-event traders generate superior performance, robust to adjustments for earnings shocks, transactions costs, size effect, and market conditions. With simultaneous upgrade and downgrade information, pre-event hedging strategies are further shown to be feasible and profitable. The authors contend that Value Line’s weekly Timeliness rank-change announcements generate abnormal returns for pre-event traders, exploiting an information asymmetry.TOPICS: Security analysis and valuation, factor-based models ER -