Penelitian ini bertujuan melihat pengaruh pengumuman marjer dan akuisisi terhadap abnormal return perusahaan pengakulsis dan juga melihat pengaruh jenis perusahaan target, metode pembayaran, serta ukuran relatif perusahaan target terhadap cumulative abnormal return perusahaan pengakuisisi. Kebijakan merjer dan akuisisi dinilai telah menjadi suatu strategi yang efektif guna menciptakan suatu sinergi. Namun berdasarkan literatur terjadi ketidakseragaman hasil akan dampak pengumuman merjer dan akuisisi terhadap abnormal return perusahaan pengakuisisi. Selain itu faktor-faktor yang mernpengaruhi abnormal return perusahaan pengakuisisi di Indonesia hingga kini masih jarang diteliti. Hasil penelitian menunjukkan bahwa pengumuman merjer dan akuisisi tidak memberikan peningkatan kesejahteraan investor secara keseluruhan. Dari tiga faktor yang diteliti (Jenis perusahaan target, metode pembayaran, serta ukuran relatif perusahaan target), hanya ukuran perusahaan target yang berpengaruh secara signifikan terhadap cumulative abnormal return perusahaan pengakuisisi.

---

The objective of this research is to measure the impact of merger and acquisition announcement to acqulirer’s abnormal return, and to see the impact of target's type. payment method. and target's size to acquirers cumulative abnormal return. Merger and acquisition decision has been admitted as an effective strategy to create synergy. But based on literatures, there were inconsistent results for the impact of merger and acquisition announcement to acquirer's abnormal return. Besides, there were only few researches in Indonesia studied about factors affecting acquirer's return. Results showed that merger and acquisition announcement doesn't give any augment to investor's welfare as a whole, From three factors explored (target's type, payment method, and target's size), only target's size has a statistical significance to acquirer's cumulative abnormal return.