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All Journal Gadjah Mada International Journal of Business Jurnal Akuntansi Multiparadigma Journal of Indonesian Economy and Business Jurnal Manajemen Teori dan Terapan WIDYAKALA JOURNAL The Indonesian Journal of Accounting Research Studi Akuntansi, Keuangan, dan Manajemen ABIS: Accounting and Business Information Systems Journal VISI SAKTI: Jurnal Industri Kreatif dan Inovatif
Sumiyana Sumiyana
Universitas Gadjah Mada
Arts Humanities Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Social Sciences Other

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Journal : Jurnal Manajemen Teori dan Terapan

 1 
Day Of The Week dan Monday Effect: Fenomena yang Terbuktikan Tidak Konsisten Di Pasar Modal Indonesia Sumiyana Sumiyana
Jurnal Manajemen Teori dan Terapan | Journal of Theory and Applied Management Vol. 1 No. 1 (2008): Jurnal Manajemen Teori dan Terapan - April 2008
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (260.428 KB) | DOI: 10.20473/jmtt.v1i1.2359

Abstract

This research critiques Sumiyana (2007a) that is actually weak methodological research design. Sumiyana (2007a) investigates trading and nontrading periods return only, or it doesn’t split intra-day return into short interval period. Although Sumiyana (2007a) found strongly the phenomenon of the Monday effect, but it could not capture the inside occurrence in the intra-trading periods. This study examines the day of the week and Monday effect phenomena in the Indonesian Stock Exchange using intraday data in every 30 minutes interval. Samples of the data are the firms listed in LQ45. Sequentially, samples are filtered to stocks that actively traded in the Indonesian Stock Exchange based on trading frequency in observation period from January to December 2006. This study uses regression analysis with multiple dummies constructed by separating trading periods in every day into 12 return periods. This research finds that day of the week phenomena occur consistently in Indonesian Stock Exchange, but the occurrence are not evenly in the same day. In addition, this study concludes that Monday effect exists partially and incidentally only.
Event Study: Pengumuman Laba Terhadap Reaksi Pasar Modal (Study Empiris, Bursa Efek Indonesia 2004-2006) Binsar I. K. Telaumbanua; Sumiyana Sumiyana
Jurnal Manajemen Teori dan Terapan | Journal of Theory and Applied Management Vol. 1 No. 3 (2008): Jurnal Manajemen Teori dan Terapan - Desember 2008
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (139.895 KB) | DOI: 10.20473/jmtt.v1i3.2367

Abstract

This paper examines the investor reaction to earnings announcement around publication dates. This paper divides into two categories. There are the positiveearning announcements which include EPS increasing, and the negative-earning announcements which consist EPS decreasing. The examination of content and efficient market hypothesis used event study. We propose one hypothesis as positifearnings announcement and negative-earnings announcement correlate to stock price reactions in IDX. The sample are the 29 companies from LQ 45 that release the annual earnings of year 2004-2006. The earnings announcement date is taken from Indonesian Securities Supervisory Agency (Bapepam). Statistical test with standard error of estimate (SEE) was used to test the abnormal return during event periods. The results show that investor do not respond significantly to the positive and negative earnings announcement at the announcement dates. In addition, earning announcements suggest information contents to capital market. Finally, the empirical result is contrary to the finding of Ball and Brown (1968), Foster (1977), and Hayn (1995). However, this evidence supports the Lako’s studies (2002a, 2002c).
Co-Authors Aini, Rias Angelia Pribadi Angelia Pribadi Asriningsih, Rani BAMBANG RIYANTO LS Binsar I. K. Telaumbanua Handoko, Suhery Hendrian Hendrian HENDRIK GAMALIEL I Wayan Nuka Lantara Irfan Nursasmito Jogiyanto Hartono Junaidi , Junaidi Mahsun, Mohamad Nurdiono Nurdiono Rahmat Febrianto Rr. Paramitha Dyah Fitriasari Said Jubran Setiyono Mihardjo Setiyono Miharjo Slamet Sugiri Suparmono Suparmono Vita Kumalasari, Vita Woro Dwi Suryani Woro Dwi Suryani ZAKI BARIDWAN Zaki Baridwan Zaki Baridwan