DAMPAK KERUSUHAN MAKO BRIMOB MEI 2018 TERHADAP ABNORMAL RETURN INDEKS LQ45 YANG TERDAFTAR DI BEI

This research is an event study that aims to determine the differencein the average Abnormal return (AR) before, during, and after the MakoBrimob riot. The subject of this study is the LQ45 index company that hasfulfilled the criteria. The company does not conduct corporate actions suchas the announcement of stock split, right issue, merger & acquisition, anddividend in the observation period, which is five days before the riot, oneday during the riot (May 9, 2018) and five days after the riot. The results ofthe data normality test found that the data in this study were normallydistributed. P-value shows the number 0.412. The results of the differenttests using independent Sample T-Test (H1) showed no difference in theaverage abnormal return before, and during the Mako Brimob riots (ρ =0.050). The results of different tests using independent Sample T-Test (H2)were no difference in the average abnormal return during and after the incidentof the Mako Brimob riots (ρ = 0.117). The results of different testsusing Paired Sample T-Test (H3) were no difference in the average abnormalreturn before and after the incident of the Mako Brimob riots (ρ = 0.77).

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REAKSI PASAR MODAL DARI DAMPAK PERISTIWA KERUSUHAN MAKO BRIMOB MEI 2018 TERHADAP ABNORMAL RETURN INDEKS LQ45 YANG TERDAFTAR DI BEI

PERFORMA ◽

10.37715/jp.v4i2.1180 ◽

2021 ◽

Vol 4 (2) ◽

pp. 30-36

Author(s):

Dewo Adhi Guminto ◽

Maria Assumpta Evi Marlina

Keyword(s):

Abnormal Return ◽

T Test ◽

P Value ◽

Normality Test ◽

Average Abnormal Return ◽

Before And After ◽

The Subject ◽

The Difference ◽

Corporate Actions ◽

Observation Period

This research is an event study that aims to determine the difference in the average Abnormal return (AR) before, during and after the Mako Brimob riots. The subject of this study is the LQ45 index company that has fulfilled the criteria, namely the company does not conduct corporate actions such as the announcement of stock split, right issue, merger & acquisition and devidend in the observation period, which is five days before the riot, one day during the riot (May 9, 2018) and five days after the riots. The results of the data normality test found that the data in this study were normally distributed. p-value shows the number 0.412. The results of the different tests using independent Sample T-Test (H1) showed no difference in the average abnormal return before and during the Mako Brimob riots (ρ = 0.050). The results of different tests using independent Sample T-Test (H2) showed no difference in the average abnormal return during and after the incident of the Mako Brimob riots (ρ = 0.117). The results of different tests using Paired Sample T-Test (H3) showed no difference in the average abnormal return before and after the incident of the Mako Brimob riots (ρ = 0.77).

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ANALYZING ABNORMAL RETURN BEFORE AND AFTER THE ANNOUNCEMENT OF MERGER AND ACQUISITION IN 2018

Journal of Business and Behavioural Entrepreneurship ◽

10.21009/jobbe.001.2.02 ◽

2018 ◽

Vol 1 (2) ◽

pp. 14-22

Author(s):

Sonny Haryanto ◽

Umi Mardiyati ◽

Agung Dharmawan Buchdadi

Keyword(s):

Mergers And Acquisitions ◽

Stock Price ◽

Abnormal Return ◽

Abnormal Returns ◽

T Test ◽

Testing Hypotheses ◽

Paired Sample ◽

Minute Period ◽

Before And After ◽

Observation Period

This study aims to analyze the abnormal returns before and after the announcement of mergers and acquisitions in the companies listed on the IDX 2018. In this study the observation period taken was three days before and after the announcement of mergers and acquisitions with the number of samples observed were 9 companies. The method for calculating abnormal returns used is the market adjusted return by using an intraday stock price of 15 minutes. Based on testing hypotheses conducted by paired sample t-test, it was found that there were no significant differences in abnormal returns before and after the announcement of mergers and acquisitions in each 15 minute period.

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The Announcement of Sharia Bank’s Conditional Merger Agreement. How Investor Reacted?

Journal of Business Management Review ◽

10.47153/jbmr22.1002021 ◽

2021 ◽

Vol 2 (2) ◽

pp. 136-146

Author(s):

Syamsuddin Syamsuddin ◽

Versiandika Yudha Pratama

Keyword(s):

Event Study ◽

Stock Price ◽

Abnormal Return ◽

Secondary Data ◽

T Test ◽

Event Window ◽

Paired Sample ◽

Average Abnormal Return ◽

Significant Difference ◽

Before And After

This study aims to determine there is a difference in average abnormal return of BRI Syariah before and after the signing of the Conditional Merger Agreement (CMA), which is on October 12th, 2020. This research used event study for method and the data in this study are secondary data in the form of stock price data of BRI Syariah. The event window in this study for 11 (eleven) working days which is 5 (five) days before the event, 1 (one) day when the event occurs and 5 (five) days after the signing of the Conditional Merger Agreement (CMA) BUMN sharia bank. Meanwhile, the estimated period is set for 120 exchange days, namely at t-125 to t-6. Test conducted by paired sample t-test. The results of the paired sample t-test showed that there is no significant difference between the average abnormal return of BRI Syariah shares before and after the signing of the Conditional Merger Agreement. It can be concluded that neither the market nor investors reacted to the signing of the Conditional Merger Agreement (CMA) that occurred at BRI Syariah Bank.

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Analisis Abnormal Return Disekitar Tanggal Pengumuman Stock Split

Gorontalo Accounting Journal ◽

10.32662/gaj.v2i2.642 ◽

2019 ◽

Vol 2 (2) ◽

pp. 77

Author(s):

Sri Yunawati

Keyword(s):

Abnormal Return ◽

Stock Exchange ◽

Abnormal Returns ◽

T Test ◽

Significance Level ◽

Paired Sample ◽

Paired Samples ◽

Average Abnormal Return ◽

Stock Split ◽

Before And After

The purpose of this study is to prove how the effect of the stock split on abnormal returns and whether there are differences in average abnormal returns before and after the stock split. This research was conducted at a company that conducted a stock split which was listed on the Indonesia Stock Exchange in 2017. The method used by a statistical test is one sample t-test (t-test for one sample) at a significance level of a = 5%. Research results show that there is no significant abnormal return when the stock split. And the tests performed on abnormal return averages before and after the stock split using paired sample t-test (t-test for two paired samples) showed that there were no significant differences in the average abnormal return before and after the stock split. Tujuan penelitian ini adalah untuk membuktikan bagaimana pengaruh stock split terhadap abnormal return dan apakah terdapat perbedaan rata-rata abnormal return sebelum dan setelah stock split. Penelitian ini dilakukan pada perusahaan yang melakukan pemecahan saham yang terdaftar di Bursa Efek Indonesia tahun 2017. Metode yang digunakan dengan uji statistik one sampel t-test (uji t untuk satu sampel) pada tingkat signifikansi a =5%. Hasil Penelitian menunjukkan bahwa tidak terdapat abnormal retum yang signifikan pada saat stock split. Dan pengujian yang dilakukan terhadap rata-rata abnormal retun sebelum dan setelah stock split dengan menggunakan paired sample t test (uji t untuk dua sampel berpasangan) diperoleh hasil bahwa tidak terdapat perbedaan yang signifikan pada rata-rata abnormal return sebelum dan sesudah stock split.

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Analyzing Abnormal Return Before And After The Announcement Of Merger And Acquisition In 2018

Journal of Business and Behavioural Entrepreneurship ◽

10.21009/jobbe.002.1.02 ◽

2018 ◽

Vol 2 (1) ◽

pp. 9-17

Author(s):

Sonny Haryanto ◽

Umi Mardiyati ◽

Agung Dharmawan Buchdadi

Keyword(s):

Mergers And Acquisitions ◽

Stock Price ◽

Abnormal Return ◽

Abnormal Returns ◽

T Test ◽

Testing Hypotheses ◽

Paired Sample ◽

Minute Period ◽

Before And After ◽

Observation Period

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Analisis Perbandingan Penghimpunan Dana Pihak Ketiga Bank Syariah Sebelum dan Sesudah Kebijakan Tax Amnesty

FALAH Jurnal Ekonomi Syariah ◽

10.22219/jes.v3i1.5831 ◽

2018 ◽

Vol 3 (1) ◽

pp. 13

Author(s):

Tk. Umar Johan ◽

Muslikhati Muslikhati

Keyword(s):

T Test ◽

Third Party ◽

P Value ◽

Paired Sample ◽

Tax Amnesty ◽

Significant Difference ◽

Before And After ◽

The Subject ◽

Selection Of

This study aims to reveal the comparison of Third Party Funds (DPK) of sharia bank as Bank Perception Tax Amnesty policy in 2016.This study used a comparative quantitative approach with the subject of research is the Third Party Funds of sharia bank the receiver of Tax Amnesty funds in 2016. The selection of DPK as a research setting based on the existence of funds for bank is vital for business continuity, because without sufficient funds the bank will not be function properly. The determination of samples was decided by Ministry of Economic in Republic Indonesia No.600/KMK.03/2016, so the sample of this research compare within 3 banks, those are; Bank Muamalat Indonesia, Bank Negara Indonesia Syariah, and Bank Syariah Mandiri. The test equipment used Paired Sample T-Test assisted software SPSS 21. The result of Paired Sample T-Test founded that there was α P value t equal to 0,000 or< 0,05, means a significant difference of DPK accumulation before and after Tax Amnesty policy in 2016. The average of DPK sharia bank before Tax Amnesty policy accumulated Rp 124,1 Trillion and increased Rp 132,9 Trillion after Tax Amnesty policy.

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ANALISIS PERBEDAAN HARGA SAHAM, RETURN SAHAM, DAN ABNORMAL RETURN SEBELUM DAN SESUDAH STOCK SPLIT PADA PERUSAHAAN HIGH PROFILE DAN LOW PROFILE YANG TERDAFTAR DI BURSA EFEK INDONESIA

Jurnal Fokus Manajemen Bisnis ◽

10.12928/fokus.v11i1.3234 ◽

2021 ◽

Vol 11 (1) ◽

pp. 42

Author(s):

Pita Rahmawati ◽

Jawoto Nusantoro ◽

Gustin Padwa Sari

Keyword(s):

Stock Returns ◽

Stock Prices ◽

Abnormal Returns ◽

T Test ◽

Paired Sample ◽

High Profile ◽

Normality Test ◽

Low Profile ◽

Stock Split ◽

Before And After

This research aims to determine whether there are differences in stock prices, stock returns and abnormal returns before and after a stock split in high profile and low profile companies. The research period used in this study was on 2016-2018. The research was analyzed in quantitative method by using a purposive sampling method. Based on the sampling criteria, 40 companies were selected as research samples. Kolmogorov Smirnov One Sample test was used for the normality test. After the normality test was carried out, the data was processed using the two paired-sample difference test. The t-test (paired sample t-test) was used if data were normally distributed but if it was not normally distributed the Wilcoxon Signed Rank test would be used. Hypothesis testing results showed that (1) there are differences in stock prices whether before and after a stock split in high profile companies (2) there are differences in stock prices whether before and after the stock split in low profile companies (3) there are differences in stock returns whether before and after a stock split in the company high profile (4) there is no difference in stock returns whether before and after the stock split in low profile companies (5) there is no difference in abnormal returns whether before and after the stock split in high profile companies (6) there is no difference in abnormal returns whether before and after the stock split in low profile companies (7) there are differences in stock prices after a stock split in high profile companies and low profile (8) there is no difference in stock returns whether before and after the stock split in high profile and low profile companies (9) there is no difference in abnormal stock returns whether before and after a stock split at high profile and low profile companies.

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EFEKTIFITAS METODE SIMULASI DAN FEEDBACK YANG KONSTRUKTIF DALAM PELATIHAN CARDIOPULMONARY RESPIRATORY UNTUK MENINGKATKAN PENGETAHUAN DAN KETERAMPILAN MAHASISWA

DINAMIKA KESEHATAN JURNAL KEBIDANAN DAN KEPERAWATAN ◽

10.33859/dksm.v10i1.299 ◽

2020 ◽

Vol 10 (1) ◽

pp. 388-401

Author(s):

Sugiarto Sugiarto ◽

Sri Sundari ◽

Lisa Musharyanti

Keyword(s):

Intervention Group ◽

Sampling Technique ◽

T Test ◽

Control Group ◽

P Value ◽

Simulation Methods ◽

Knowledge And Skills ◽

Paired Sample ◽

Constructive Feedback ◽

Before And After

Constructive feedback is an effort to increase knowledge and skills so that instructors can find out how to provide constructive feedback. Constructive feedback of simulation methods needs to be given to students in order that they are motivated to increase their knowledge and skill. The objective of this study is to understand increasing of student’s knowledge and skill in simulation methods with and without constructive feedbacks. Methods used in this study is Quasi Experiment using pretest and posttest with control group. Total respondents used in this study are 77 respondents with 40 students of intervention group and 37 students of control group using purposive sampling technique. Respondents were given interventions such as constructive feedback.The results of study using paired sample t-test indicate that there was significant effect on giving constructive feedback to students before and after giving interventions with p-value result of 0.05. It is expected that feedback is continuously given by an educator to grow learning spirit and self-introspection to students.

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ANALISIS PENGARUH PENGUMUMAN DIVIDEN TERHADAP PERUBAHAN HARGA SAHAM (RETURN) SEBELUM DAN SESUDAH EX-DIVIDEND DATE DI BURSA EFEK JAKARTA (BEJ)

JURNAL INFORMASI, PERPAJAKAN, AKUNTANSI, DAN KEUANGAN PUBLIK ◽

10.25105/jipak.v1i2.4417 ◽

2019 ◽

Vol 1 (2) ◽

pp. 73

Author(s):

Wibowo Wibowo ◽

Melati Adorini

Keyword(s):

Capital Market ◽

Abnormal Return ◽

Stock Return ◽

Stock Exchange ◽

Paired Sample ◽

Before And After ◽

Independent Variable ◽

Return Difference ◽

The Impact ◽

Observation Period

The objective of this research was to analyze the impact of ex-dividend date announcement in Jakarta Stock Exchange (JSX) on stock return during the period of 2000- 2004. This research takes 25 corporation samples which are divided into two groups, namely increasing dividend group and decreasing dividend group. The method used in this research is event study that observed the stock return movement in capital market. The observation period was during 15 days before and 15 days after ex-dividend date. In order to examine the existence of price reaction, the abnormal return was conducted during the event period towards the increasing dividend group and decreasing dividend group. The independent variable used was dividend declaration (increasing dividend and decreasing dividend) and dependent variable used was stock return. The calculation of this research using paired sample t test, was to prove if there is any stock return differences between before and after ex-dividend date announcement with the presence of increasing dividend declaration and decreasing dividend declaration in Jakarta Stock Exchange (JSX). The result of this research had shown two conclutions that for the increasing dividend group, there were no stock return (abnormal return) diffrerence between before and after ex-dividend date due to the increasing dividend declaration in Jakarta Stock Exchange (JSX) and for the decresing dividend group there was stock return (abnormal return) difference between before and after ex-dividend date due to decresing dividend declaration in Jakarta Stock Exchange (JSX).

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PENGARUH PENGUMUMAN STOCK BUYBACK TERHADAP REAKSI PASAR PADA PERUSAHAAN YANG TERDAFTAR DI BURSA EFEK INDONESIA (BEI) PERIODE 2016-2019

JURNAL AKUNTANSI : TRANSPARANSI DAN AKUNTABILITAS ◽

10.35508/jak.v8i2.3645 ◽

2020 ◽

Vol 8 (2) ◽

pp. 145-153

Author(s):

Qonita Zein ◽

Taufiq Akbar

Keyword(s):

Event Study ◽

Abnormal Return ◽

Trading Volume ◽

T Test ◽

Volume Activity ◽

Paired Sample ◽

Purposive Sampling ◽

Average Abnormal Return ◽

Stock Buyback

ABSTRAK Penelitian ini bertujuan untuk menganalisis pengaruh pengumuman pembelian kembali (buyback) saham terhadap reaksi pasar pada perusahaan yang terdaftar di Bursa Efek Indonesia (BEI) tahun 2016-2019. Penelitian ini terdiri dari 32 sampel perusahaan dari seluruh sektor yang terdaftar di Bursa Efek Indonesia (BEI) dan melakukan pengumuman pembelian kembali (buyback) saham. Data yang digunakan dalam penelitian ini adalah data sekunder berupa harga saham dan volume perdagangan saham dan metode pemilihan sampel menggunakan metode purposive sampling. Metode analisis yang digunakan dalam penelitian ini yaitu event study. Teknik analisis data yang digunakan untuk penelitian ini adalah uji normalitas yaitu Kolmogrov-Smirnov, dilanjutkan dengan uji paired sample t-test untuk hipotesis 1 dan hipotesis 2 dengan tingkat signifikansi 0,05. Hasil penelitian ini menunjukkan bahwa terdapat pengaruh signifikan terhadap variabel average abnormal return, namun tidak terdapat pengaruh signifikan terhadap variabel average trading volume activity sebelum dan setelah pengumuman pembelian kembali (buyback) saham. Kata kunci: Buyback, Abnormal Return, Trading Volume Activity.

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