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All Journal Jurnal Keuangan dan Perbankan JDM (Jurnal Dinamika Manajemen) Gadjah Mada International Journal of Business Journal of Indonesian Economy and Business Indonesian Capital Market Review Journal of Indonesian Economy and Business
Mamduh M. Hanafi
Faculty Of Economics And Business, Universitas Gadjah Mada
Decision Sciences, Operations Research & Management Economics, Econometrics & Finance

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Unusual Market Activity Announcements: A Study of Price Manipulation on the Indonesian Stock Exchange Hanafi, Mamduh M.
Gadjah Mada International Journal of Business Vol 12, No 2 (2010): May - August
Publisher : Master of Management, Faculty of Economics and Business, Universitas Gadjah Mada

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Abstract

We investigate stocks involved in the Unusual Market Activity (UMA) Announcements. The Indonesian Stock Exchange occasionally issues UMA announcements when it suspects that there are unusual price increases (positive UMAs) or price decreases (negative UMAs), as well as unusual increases in trading volumes. We believe that UMA announcements signal a high probability that stocks are being manipulated. We find no differences in fundamentals and trading variables between stocks in the UMA announcements and those not in the UMA announcements. Any stock is vulnerable to market manipulation. Stocks in the UMA announcements do not exhibit reversal patterns, suggesting that price effect is permanent. UMAs seem to convey relevant information, which is most likely in the form of insider type of information.Keywords: emerging market; price manipulation; unusual market activity announcement.
Detecting the Existence of Herding Behavior in Intraday Data: Evidence from the Indonesia Stock Exchange Setiyono, Setiyono; Tandelilin, Eduardus; Hartono, Jogiyanto; Hanafi, Mamduh M.
Gadjah Mada International Journal of Business Vol 15, No 1 (2013): January - April
Publisher : Master of Management, Faculty of Economics and Business, Universitas Gadjah Mada

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Abstract

This study attempts to investigate the issue of the existence of institutional herding in the stock market. The existence is detected in the intraday trade data from the Indonesia Stock Exchange (IDX) during up, down, and stable market condition over the period 2003-2005. By using the model of Lakonishok et al. (1992), it is found that the intensity of the existence of institutional herding at the IDX, on average, is 8.4 percent. Institutional investors do not seem to lead their transactions ina certain characteristic of stock. Most of them follow positive-feedback trading strategy while others follow negative-feedback trading strategy. This study also found that the existence of herd behavior at the IDX did not destabilize the market price in a subsequent period.
AN INVESTIGATION OF PRICE MOVEMENTS DURING THE ANNOUNCEMENT OF ACQUISITION NEWS: THE CASE OF JAKARTA STOCK EXCHANGE Hanafi, Mamduh M.
Journal of Indonesian Economy and Business Vol 17, No 4 (2002): October
Publisher : Journal of Indonesian Economy and Business

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Abstract

Paper ini ingin melihat siapa yang berada di balik pergerekan harga selama periode pengumuman merjer dan akuisisi di Bursa Efek Jakarta. Data menunjukkan bahwa harga meningkat cukup tajam selama periode pengumuman. Penelitian ingin membandingkan apakah investor asing atau domestik yang mendorong pergerakan harga tersebut. Disamping itu, penelitian ini ingin melihat apakah pergerekan harga terkonsentrasi pada volume perdagangan (trade size) yang kecil atau tidak dan apakah terkonsentrasi pada investor domestik yang menggunakan volume perdagangan yang kecil. Hasil analisis memperlihatkan bukti yang cukup kuat yang menunjukkan bahwa investor domestik mendorong pergerakan harga tersebut. Untuk hipotesis kedua dan ketiga, tidak ditemukan bukti yang cukup kuat. Pergerakan harga oleh investor domestik tersebut menunjukkan superioritas informasi yang dimiliki oleh investor domestik, yang berarti ada asimetri informasi di Bursa Efek Jakarta.Keywords: Price movement, trading size, acquisition announcement.
BANK RISK AND MARKET DISCIPLINE Taswan, Taswan; Tandelilin, Eduardus; Husnan, Suad; Hanafi, Mamduh M.
Journal of Indonesian Economy and Business Vol 27, No 3 (2012): September
Publisher : Journal of Indonesian Economy and Business

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Abstract

This paper investigates the issue of bank risk taking. Specifically we investigate two main issues: (1) determinants of bank risk, and (2) market discipline to the banks either in implicit, explicit guarantee systems, and all periods. Using Indonesian data, we find that domestic, foreign, and ownership concentration have positive impact on bank risk. Bank shareholders engage in entrenchment behaviour, rather than convergence behaviour. We further find that charter value and compliance to regulation have negative impact on bank risk. Next, we find that market disciplines the banks. Market disciplines the banks at thesame degree in implicit and explicit deposit guarantee systems. Our findings highlight the importance of paying close attention to banks ownership, charter value, and compliance to regulation. Furthermore, since we find that market disciplines the Banks at the same degree in explicit and implicit guarantee systems, we need to investigate this issue further.This finding highlights research potential in the future: to investigate disciplining behaviour from various types of depositors.Keywords: bank ownership, market discipline, risk, entrenchment, convergence, and deposit insurance
HERDING BETWEEN INSTITUTIONAL AND INDIVIDUAL INVESTORS: THE JAPANESE CASE Hanafi, Mamduh M.
Journal of Indonesian Economy and Business Vol 18, No 4 (2003): October
Publisher : Journal of Indonesian Economy and Business

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Abstract

Artikel ini membandingkan perilaku herding antara investor institusional dengan investor individual menggunakan data Jepang. Artikel ini menemukan bahwa investor institusional melakukan herding lebih besar pada saham kecil. Artikel ini juga menemukan bahwa herding oleh investor institusional nampaknya tidak mempunyai efek negatif (destabilizing) dalam jangka pendek. Dalam jangka panjang, artikel ini menemukan pembalikan harga (reversal) untuk saham dimana investor institusional melakukan herding. Artikel ini menemukan bahwa saham yang dilepas investor institusional mempunyai reaksi harga yang negatif, nampaknya tindakan pelepasan tersebut didorong oleh motivasi yang rasional. Artikel ini juga menemukan bahwa perdagangan oleh investor institusional mempunyai pengaruh yang lebih besar terhadap harga; investor institusional nampaknya tidak melakukan perdagangan umpan balik positif (positive feedback trade). Saham yang mempunyai kepemilikan institusi paling stabil mempunyai kinerja yang paling baik.Keywords: herding, Japan, efficient markets.
STRUKTUR KEPEMILIKAN, RISIKO, DAN KEBIJAKAN KEUANGAN: ANALISIS PERSAMAAN SIMULTAN Ismiyanti, Fitri; Hanafi, Mamduh M.
Journal of Indonesian Economy and Business Vol 19, No 2 (2004): April
Publisher : Journal of Indonesian Economy and Business

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Abstract

The research explores using simultaneous regression, to examine the interdependencerelationship between managerial ownership, risk, dividend policy, institutional ownership,and leverage policy for Indonesian capital market. The research tries to explain how therelationships in financial policy for manufacture firms in Indonesia. We use five models ofregression to represent five different policies in firms that reflect the agency issues andconflict of interest between agent (manager), and principal (insider and outsidershareholders). Jensen and Meckling (1976) argued that agency problem arise fromseparation of ownership and control. Each of five policies in this research is representconflict of interest between agent and principal. The research combined models fromCrutchley, Jensen, Jahera and Raymond (1999), and Chen and Steiner (1999) to construct five-regression policies model.We find interdependence relationship between managerial ownership, risk, dividendpolicy, institutional ownership, and leverage policy. We also find substitution effectbetween dividend policy and managerial ownership, and between managerial ownershipand institutional ownership as predicted by agency theory. The substitution effect showedthat ownership structure effectively used to reduce the agency problem between agent and principal. The study confirms that the relationship between risk and dividend is non-linear.Keyword: Agency Theory; Managerial Ownership; Risk; Dividend Policy; Debt Policy.
PRICE STABILIZATION AND IPO UNDERPRICING: AN EMPIRICAL STUDY IN THE INDONESIAN STOCK EXCHANGE Husnan, Suad; Hanafi, Mamduh M.; Munandar, Muhammad
Journal of Indonesian Economy and Business Vol 29, No 2 (2014): May
Publisher : Journal of Indonesian Economy and Business

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Abstract

We attempt to investigate IPO underpricing and stabilization activities. We find IPOunderpricing of around 25% in the Indonesia market. Return distribution for the first 30-tradingdays shows a positive skew, the distribution becomes closer to normality as the periodlengthens. We then develop and test five algorithms to detect IPO intervention. An importantgoal of this paper is to develop an algorithm that will be able to detect IPO intervention usingpublic data. We find that the number of closing prices that are equal to the offer prices and theskewness of the IPO return in the first 30-trading days are the ‘best’ stabilization measures.Having found “the best measures”, then we investigate under what conditions IPO interventionis more intensive. We find that underwriters tend to stabilize more on more expensive IPOs.Keywords: IPO, Indonesia, underpricing, stabilization
ANALYSIS OF IPO UNDERPRICING FLUCTUATION: EMPIRICAL STUDY IN INDONESIA STOCK EXCHANGE Hanafi, Mamduh M.
Jurnal Dinamika Manajemen Vol 7, No 2 (2016): September 2016 (DOAJ Indexed)
Publisher : Department of Management, Faculty of Economics, Semarang State University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jdm.v7i2.8197

Abstract

This study attempts to analyze fluctuation of IPO underpricing in Indonesia market from 1990-2010. This research test three proposed hypotheses: changing risk composition, changing incentives alignment, and changing issuers’ objective function. The researcher also add other variables as potential explanation for underpricing fluctuation: introduction of book building mechanism in year 2000, industry (finance and non-finance), market return, and privatization (IPO of state owned companies and non-state owned companies). The analysis shows that market return and the introduction of book building mechanism have positive impact on underpricing. However, when both variables in regression equation are included, the effect of market return disappears, while the effect of book building mechanism persists. This finding seems to support Book Building advantage arguments and changing issuers’ objective functions hypothesis, in the sense that the introduction of book building mechanism changes objective function of parties involved. Final result is a change in IPO under pricing.
Analysis of IPO Underpricing Fluctuation: Empirical Study in Indonesia Stock Exchange Hanafi, Mamduh M.
JDM (Jurnal Dinamika Manajemen) Vol 7, No 2 (2016): September 2016 (DOAJ Indexed)
Publisher : Department of Management, Faculty of Economics, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jdm.v7i2.8197

Abstract

This study attempts to analyze fluctuation of IPO underpricing in Indonesia market from 1990-2010. This research test three proposed hypotheses: changing risk composition, changing incentives alignment, and changing issuers objective function. The researcher also add other variables as potential explanation for underpricing fluctuation: introduction of book building mechanism in year 2000, industry (finance and non-finance), market return, and privatization (IPO of state owned companies and non-state owned companies). The analysis shows that market return and the introduction of book building mechanism have positive impact on underpricing. However, when both variables in regression equation are included, the effect of market return disappears, while the effect of book building mechanism persists. This finding seems to support Book Building advantage arguments and changing issuers objective functions hypothesis, in the sense that the introduction of book building mechanism changes objective function of parties involved. Final result is a change in IPO under pricing.
The Effect of Intellectual Capital towards Firm Performance and Risk with Board Diversity as a Moderating Variable: Study in ASEAN Banking Firms Innayah, Maulida Nurul; Pratama, Bima Cinintya; Hanafi, Mamduh Mahmadah
JDM (Jurnal Dinamika Manajemen) Vol 11, No 1 (2020): March 2020 (DOAJ Indexed)
Publisher : Department of Management, Faculty of Economics, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jdm.v11i1.21487

Abstract

This paper finds out the impact of intellectual capital on firm performance and risk. Moreover, this paper also examines whether the board diversity in terms of gender and nationality can strengthen the effect of intellectual capital towards firm performance and risk that operates in banking industries in ASEAN. The data in this study obtained from Bloomberg and OSIRIS database and also the firm’s annual reports over the period of 2012-2016 (375 observations) and conducted in ASEAN countries, namely Indonesia, Philippines, Malaysia, Singapore, and Thailand. The results find that the efficient and effective use of intellectual capital will make the firms achieved higher performance. Meanwhile, intellectual capital can help reduce credit risk. In the interaction effect, the result is consistent with social psychology theory and shows that the presence of board diversity actually reduces firm performance and increases risk.
Co-Authors Barsiano, Redik Eduardus Tandelilin Fitri Ismiyanti Fitri Ismiyanti, Fitri Jogiyanto Hartono Maulida Nurul Innayah Muhammad Munandar Muizzuddin Muizzuddin Pratama, Bima Cinintya R. Heru Kristanto HC Redik Brasiano Setiyono Setiyono Setiyono, Bowo Suad Husnan Taswan, Taswan Usman Arief Usman Arief, Usman