2014
DOI: 10.1111/fima.12053
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Measuring Deal Premiums in Takeovers

Abstract: We investigate whether the merger announcement dates provided in the Securities Data Corporation (SDC) database are handled correctly by researchers performing event studies. We find that in 24.1% of deals, the popular choice of using the SDC's “Date Announced” field as the event date leads to biased estimates of target firm abnormal returns because of earlier abnormal price movements due to merger‐related events such as merger rumors or search‐for‐buyer types of announcements. We hand collect the merger‐relat… Show more

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Cited by 54 publications
(13 citation statements)
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“…If a target receives several bids, only the first is considered to minimize confounding events. Here, we used SDC's “original date announced,” which is the very first bid in a possible sequence and the most reliable date for premium measures (Mulherin and Simsir, ). All acquisitions with the same immediate or ultimate parent are eliminated (e.g., internal reorganization).…”
Section: Data and Variablesmentioning
confidence: 99%
“…If a target receives several bids, only the first is considered to minimize confounding events. Here, we used SDC's “original date announced,” which is the very first bid in a possible sequence and the most reliable date for premium measures (Mulherin and Simsir, ). All acquisitions with the same immediate or ultimate parent are eliminated (e.g., internal reorganization).…”
Section: Data and Variablesmentioning
confidence: 99%
“…Third, stock prices might incorporate M&A related news prior to announcement date if there are information leakages in emerging-market countries or if investors anticipate deals prior to announcement ( Malatesta and Thompson, 1985;Brunnermeier, 2005;Cornett et al, 2011;Cai et al, 2011 announcement dates may also affect the results. Mulherin and Simsir (2015) and Arslan and Simsir (2016) document abnormal price movements before SDC announcement dates due to merger-related events (such as merger rumors or search-for buyer announcements) in 24% of US deals and 74% of Turkish deals, respectively. We investigate whether M&A related news might be released and reflected in stock prices before the announcement by analyzing abnormal returns in the 90 trading days prior to SDC announcement dates.…”
Section: Cross-country Differences In Bidder and Target Carsmentioning
confidence: 99%
“…Given that the differences in announcement returns are not always significant, and the difficulty in identifying when the market became aware of the acquisition (Mulherin and Simsir, 2015), we are cautious in interpreting these results as showing increased Takeover Defenses improves managerial bargaining power in this setting. However, we note that none of the results are consistent with the notion that increasing Takeover Defenses harms shareholders conditioned on being acquired.…”
Section: Takeover Premiummentioning
confidence: 99%
“…Repeating our tests using individual provisions and groups as a whole for the other three categories confirmed that firms do not significantly alter any of these provisions after the adoption of the IDD.22 We use the announcement date correction methodology described inMulherin and Simsir (2015).…”
mentioning
confidence: 95%