Research aims to identify the immediate impact of the announcement of mergers in the stockholders and the feasibility of gain abnormal return and benefiting from asymmetric information during the announcement that unite 30 days before the announcement of the merger, and announcement day, and 30 days after the announcement of the merger. It was the largest and most important mergers and acquisitions pick that occurred during the global financial crisis, specifically in health care/pharmaceutical industry, Pfizer and Wyeth merger with Novartis acquisition on Alcon. search has adopted three hypotheses: the first hypothesis that ((achieves the target company's shareholders positive abnormal return (or negative) during and before the announcement of the merger or acquisition. by asymmetric information (reduced asymmetric information)) and the second premise that ((bring the shareholders of the target company extraordinary returns(abnormal return) zero or negative - which-following the announcement of Merger or acquisition. owing to the low information asymmetry)) third hypothesis determined ((improved financial and operational performance in the company after the merger announcement mergers. using financial and statistical methods in measurement, the search to the inability of shareholders achieve extraordinary returns(abnormal return) a positive or zero during the announcement of the merger, but there was an extraordinary negative revenue accumulation as a result of higher expected return on actual revenue of the arrow, as well as provide information that is identical for all market participants. Conversely, the integration Lead to disparate outcomes profitability per share EBS integration in cornering, noting the results of the analysis to reduce the profitability of the combined company per share and height in the incorporating company what it was before the merger, appears in the first year after the merger, and acquisition leads to reduction of EPS for both the company and the target company's nieces in the case of Combined compared to what it was before the acquisition.
