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"Algorithmic trading (AT) sebagai fenomena mutakhir di pasar keuangan, khususnya pasar di Amerika dan wilayah Eropa, masih menjadi kontroversi. Ada yang menganggap (dan menunjukkan) AT memberi pengaruh positif terhadap market quality, ada juga yang menunjukkan hal sebaliknya. Menggunakan proxy aktivitas perdagangan, penelitian ini mengidentifikasi tren penggunaan AT dan dampaknya terhadap market quality di BEI. Adanya peningkatan aktivitas perdagangan (trading) yang dibarengi perubahan strategi perdagangan (nature of trading) menjadi petunjuk kuat tren penggunaan AT di BEI, meskipun dengan intensitas yang relatif lebih rendah dibandingkan pada pasar-pasar negara maju. Secara umum AT meningkatkan bid-ask spreads dan effective spreads, menurunkan bid-ask depth, serta mengurangi volatilitas harga saham. Hal ini menjadi indikasi bahwa AT memberi dampak negatif dengan menurunkan likuiditas pasar namun di saat yang sama justru memberi dampak positif dengan mengurangi volatilitas harga saham di BEI.

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Algorithmic trading (AT) as a fairly new phenomenon in financial markets, especially in the American and European markets, still have controversy and discourse with respect to its impact on market quality. Using normalized measure of Indonesia Stock Exchange (IDX) electronic message traffic as proxy for AT, this paper investigates AT and its impact on market quality in IDX. Significant increase in trading activity as well as change of trading strategy have become evidence of an increase in the use of AT in IDX, with relatively lower than both US and European markets. In general, AT wide bid-ask spreads and effective spreads, reduces bid-ask depth, as well as reduces volatility. These findings indicate that AT has negative impact on liquidity and positive impact on volatility in IDX."

"ABSTRAKTesis ini bertujuan untuk menganalisa keberadaan perilaku herding di Bursa Efek Indonesia dan pengaruhnya terhadap imbal hasil IHSG tahun 2015 ndash;2016. Analisis dilakukan dengan menggunakan metode Cross Sectional Standard Deviation CSSD dan Cross Sectional Absolute Deviation CSAD . Kedua metode tersebut mengukur penyebaran imbal hasil antara saham individu dengan IHSG. Hasil penelitian membuktikan bahwa perilaku herding tidak terjadi di Bursa Efek Indonesia pada tahun 2015-2016 dengan menggunakan kedua metode tersebut. Selain itu, penelitian ini membuktikan bahwa volume transaksi hanya berpengaruh signifikan terhadap imbal hasil IHSG tahun 2016.

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ABSTRACTThis thesis is aimed to analyze existence of herding behavior ini Indonesia Stock Exchange and its impact on IHSG return volatility for 2015 2016 period. Cross Sectional Standard Deviation CSSD and Cross Sectional Absolute Deviation CSAD method are used in this research. Both method measure return dispersion between individual stock and IHSG. Empirical results show that there are no evidence of herding behavior in Indonesia Stock Exchange for 2015 2016 period. Beside of that, this research shows that transaction volume has significant impact on IHSG return volatility only on 2016 period."

"Tesis ini membahas mengenai pengaruh stock mispricing terhadap return reversal saham-saham di Bursa Efek Indonesia. Penelitian ini merupakan penelitian kuantitatif dengan menggunakan panel data dari tahun 2006 hingga tahun 2011. Variabel mispricing diukur melalui proksi volatilitas atau standar deviasi dari nilai residual. Terdapat empat variabel dependen di dalam penelitian ini untuk melihat mean reverting saham, yaitu return minggu pertama, return minggu kedua, return minggu ketiga dan return minggu keempat seletah periode mispricing. Hasil dari penelitian ini menyimpulkan bahwa tingkat mispricing suatu saham berpengaruh positif dan signifikan terhadap return reversal. Berdasarkan analisa t-statistic untuk setiap regresi, maka didapatkan hasil bahwa variabel mispricing paling berpengaruh terhadap return reversal saham terhitung pada minggu kedua setelah periode mispricing. Pada minggu ketiga dan keempat setelah periode mispricing, return saham telah mengikuti proses mean reverting, yaitu return berangsurangsur kembali perlahan kepada return semestinya.

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This thesis discusses the effect of mispricing to return reversal stocks in the Indonesia Stock Exchange. This is a quantitative method using panel data from 2006 until 2011. Mispricing variable was measured by the residual volatility (standar deviation) proxy. There are four dependent variables in this study to look at the mean reverting of stocks, which are return on the first week, return on the second week, return on the third week and return on the fourth week after the mispricing period.

This study concludes that the stock mispricing has a positive and significant impact on return reversal. Based on t-statistic analysis for each regression, the most influence effects starts in the second week after mispricing period. In the third and fourth weeks after mispricing period, stock returns have been following the mean reverting process, which gradually return to the supposed return."

"[Dalam pasar keuangan, mendapatkan suatu abnormal return merupakan suatu halyang diinginkan oleh semua investor baik itu investor skala besar, skala kecil, trader,maupun oleh perusahaan efek dalam hal ini broker. Berbagai macam teknik dalammelakukan suatu transaksi dilakukan oleh para investor, untuk mendapatkanabnormal return, mulai dengan melakukan suatu riset untuk mendapatkan intrinsicvalue dari sebuah perusahaan sampai dengan melakukan suatu tindak kejahatandalam pasar keuangan. Tindak kejahatan yang terjadi dalam pasar keuangan dapatbermacam-macam bentuknya mulai dari penipuan dalam bertransaksi sampai denganmanipulasi pasar. Dalam hal menanggulangi kerugian yang mungkin didapatkan olehmasing-masing pelaku keuangan, para otoritas dalam negeri membuat bermacammacamregulasi. Namun dalam hal ini, tindakan manipulasi pasar merupakantindakan kejahatan yang sangat sulit untuk dibuktikan, seperti yang telahdiungkapkan oleh Jarrow (1992). Tesis ini mengukur tingkat volatilitas dan likuiditassebagai proksi untuk indikasi manipulasi pasar dalam bursa saham Indonesia. Dalammeneliti manipulasi pasar, volatilitas dan likuiditas dijadikan sebuah acuan yangdapat menggambarkan perilaku dari investor untuk menipu investor lainnya dalammendapatkan abnormal return. Metode pengukuran yang digunakan adalah denganmengukur order cancellation dari masing-masing jenis saham seperti yang telahdilakukan oleh Chan dan Ma (2014). Dengan demikian dapat dianalisis pengaruhorder cancellation ini dalam tindakan kejahatan manipulasi pasar yang berupa orderbasedmanipulation;In financial markets, getting an abnormal return is something that is desired by allinvestors both large-scale investors, small-scale traders, as well as by the company inthis case securities broker. Various techniques in performing a transaction carried outby the investor, to obtain abnormal return, started by doing some research to get theintrinsic value of a company until committing a crime in the financial markets.Crimes that occurred in the financial markets vary from fraud in transactions throughmarket manipulation. In terms of handling the losses that is gained by each of thefinancial actors, the authorities in the country make the various regulations. But inthis case, the action of market manipulation is very difficult to prove, as has beenrevealed by Jarrow (1992). This thesis measures the volatility and liquidity levels as aproxy for an indication of market manipulation in the Indonesian stock market. Inresearching market manipulation, volatility and liquidity can be used as a referencefor describing the behavior of other investors to defraud investors in obtainingabnormal returns. Measurement method used is to measure the cancellation order ofeach type of shares as has been done by Chan and Ma (2014). Thus it can be analyzedthe effect of this cancellation order in the criminal market manipulation in the form ofan order-based manipulation;In financial markets, getting an abnormal return is something that is desired by allinvestors both large-scale investors, small-scale traders, as well as by the company inthis case securities broker. Various techniques in performing a transaction carried outby the investor, to obtain abnormal return, started by doing some research to get theintrinsic value of a company until committing a crime in the financial markets.Crimes that occurred in the financial markets vary from fraud in transactions throughmarket manipulation. In terms of handling the losses that is gained by each of thefinancial actors, the authorities in the country make the various regulations. But inthis case, the action of market manipulation is very difficult to prove, as has beenrevealed by Jarrow (1992). This thesis measures the volatility and liquidity levels as aproxy for an indication of market manipulation in the Indonesian stock market. Inresearching market manipulation, volatility and liquidity can be used as a referencefor describing the behavior of other investors to defraud investors in obtainingabnormal returns. Measurement method used is to measure the cancellation order ofeach type of shares as has been done by Chan and Ma (2014). Thus it can be analyzedthe effect of this cancellation order in the criminal market manipulation in the form ofan order-based manipulation;In financial markets, getting an abnormal return is something that is desired by allinvestors both large-scale investors, small-scale traders, as well as by the company inthis case securities broker. Various techniques in performing a transaction carried outby the investor, to obtain abnormal return, started by doing some research to get theintrinsic value of a company until committing a crime in the financial markets.Crimes that occurred in the financial markets vary from fraud in transactions throughmarket manipulation. In terms of handling the losses that is gained by each of thefinancial actors, the authorities in the country make the various regulations. But inthis case, the action of market manipulation is very difficult to prove, as has beenrevealed by Jarrow (1992). This thesis measures the volatility and liquidity levels as aproxy for an indication of market manipulation in the Indonesian stock market. Inresearching market manipulation, volatility and liquidity can be used as a referencefor describing the behavior of other investors to defraud investors in obtainingabnormal returns. Measurement method used is to measure the cancellation order ofeach type of shares as has been done by Chan and Ma (2014). Thus it can be analyzedthe effect of this cancellation order in the criminal market manipulation in the form ofan order-based manipulation, In financial markets, getting an abnormal return is something that is desired by allinvestors both large-scale investors, small-scale traders, as well as by the company inthis case securities broker. Various techniques in performing a transaction carried outby the investor, to obtain abnormal return, started by doing some research to get theintrinsic value of a company until committing a crime in the financial markets.Crimes that occurred in the financial markets vary from fraud in transactions throughmarket manipulation. In terms of handling the losses that is gained by each of thefinancial actors, the authorities in the country make the various regulations. But inthis case, the action of market manipulation is very difficult to prove, as has beenrevealed by Jarrow (1992). This thesis measures the volatility and liquidity levels as aproxy for an indication of market manipulation in the Indonesian stock market. Inresearching market manipulation, volatility and liquidity can be used as a referencefor describing the behavior of other investors to defraud investors in obtainingabnormal returns. Measurement method used is to measure the cancellation order ofeach type of shares as has been done by Chan and Ma (2014). Thus it can be analyzedthe effect of this cancellation order in the criminal market manipulation in the form ofan order-based manipulation]"

"Skripsi ini membahas tentang analisis pengaruh sebelum dan sesudah pengumuman right issue terhadap volatilitas harga saham dan volume perdagangan yang meliputi volatility persistence dengan menggunakan pendekatan time varying volatility. Sampel yang digunakan adalah perusahaan yang terdaftar di Bursa Efek Indonesia 2006-2015 yang melakukan right issue. Model Autoregressive Conditional Heteroskedasticity ARCH dan Generalized Autoregressive Conditional Heteroskedasticity GARCH digunakan untuk menjelaskan volatilitas dalam penelitian ini. Hasil penelitian ini menunjukkan bahwa volatilitas harga saham dan volume perdagangan yang meningkat sebelum pengumuman dan menurun setelah pengumuman right issue.

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The Focus of this study is to analyze the significance of stock price and trading volume volatility around right issue announcement date, covering volatility persistence by using time varying volatility approach. The sample used is listed company in Indonesia Stock Exchange for the periode 2006 2015 which have done right issue. Autoregressive Conditional Heteroskedasticity ARCH and Generalized Autoregressive Conditional Heteroskedasticity GARCH model is used to examine the volatility. The results indicate that stock price and trading volume volatility have increased before the announcements and decreased after the rights issue announcements."

"Penelitian ini mempelajari mengenai pola transaksi dan kinerja investasi pada saham yang terdaftar dalam pengumuman saham suspend dan saham unsuspend di Bursa Efek Indonesia selama periode 2016-2017 berdasarkan berbagai tipe investor dan juga mengkaji keberadaan price reversal pada periode tersebut. Dengan menggunakan data transaksi harian yang dibagi kedalam beberapa tipe investor lokal dan asing detail, didapatkan hasil bahwa, perilaku herding lebih kuat terjadi pada investor asing dibandingkan dengan investor lokal. Pada kategori tipe investor lokal dan asing detail, tipe investor perusahaan efek lokal memiliki perilaku herding paling kuat pada kedua periode suspensi. Kinerja investasi secara kumulatif investor asing lebih baik daripada investor lokal dan kinerja investasi terbaik didapatkan oleh tipe investor perusahaan efek lokal. Investor lokal memiliki pola investasi information-based model, sedangkan investor asing memiliki pola investasi value investing pada periode sebelum suspend dan information-based model pada periode setelah unsuspend. Untuk tipe investor detail yang memiliki pola investasi behavioral-based model pada kedua periode suspensi adalah investor individual lokal, investor perusahaan asing, dan investor bank asing. Sedangkan untuk pola value investing adalah investor individu asing. Investor asuransi lokal, investor lainnya lokal, dan perusahan efek asing memiliki pola investasi information-based model pada kedua periode suspensi. Berdasarkan analisa uji ANOVA didapatkan bahwa telah terjadi indikasi price reversal pada periode pengumuman sebelum suspend dan setelah unsuspend.

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This research examines trading patterns and performance of stock before and after suspension announcement in Indonesia Stock Exchange during 2016 to 2017 based on investor type and also examines the existence of price reversal. By using the daily transaction data of domestic and foreign investor detail, proved that herding behavior is stronger in foreign investor than domestic investor in both suspension period. Based on detail investor category, securities company domestic investors have the strongest herding in both suspension period. Investment performance of foreign investors are better than domestic investors and the best investment performance are securities domestic investors. Domestic investors have information-based model as an investing pattern, while foreign investor has value investing model in before suspension and information-based model after suspension. For investor type that have behavioral-based model are individual domestic, corporate foreign, and bank foreign investors. Whereas, for value investing model is individual foreign investor. Insurance domestic, other domestic, and securities company foreign investors have information-based model investing pattern in both suspension period. Based on ANOVA analysis showed that there has been a price revesal indication in before suspend announcement and after unsuspend announcement period."

"Penelitian ini bertujuan menganalisis pengaruh board governance dan cash holdings terhadap nilai perusahaan. Penelitian ini menggunakan uji analisis Fixed Effect Model (FEM). Variabel independen pada penelitian ini adalah ukuran dewan komisaris, dewan komisaris independen, komite audit, kepemilikan saham orang dalam, dan kepemilikan kas, sedangkan variabel dependen adalah nilai perusahaan yang diproksikan oleh logaritma harga saham penutupan akhir tahun.Penelitian ini menggunakan data panel sejumlah 378 observasi dari sampel perusahaan yang terdaftar di Bursa Efek Indonesia periode 2005-2010. Hasil penelitian menunjukkan bahwa: (1) ukuran dewan komisaris, dewan komisaris independen, dan kepemilikan saham orang dalam memiliki pengaruh yang tidak signifikan terhadap nilai perusahaan, (2) komite audit dan kepemilikan kas memiliki pengaruh yang signifikan terhadap nilai perusahaan.

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The main objective of this research is to analyze the effect of board governance and cash holdings on firm value. This research are analyze with Fixed Effect Model (FEM). The Independent variables in this research are the board size, board independence, audit committee, insider ownership and cash holdings, for the dependent variable is firm value that proxied by log of year end share prices.This study use a panel data sample of 378 observations listed firms in the Indonesia Stock Exchange for the period 2005-2010. The results showed that: (1) board size, board independence, and insider ownership doesn?t have significant effect on firm value, (2) audit committee and cash holdings have significant effect on firm value."

"Penelitian terbaru dalam behavioral finance telah menyangkal teori pasar efisien. Bias psikologi yang dapat memengaruhi perilaku investor dan harga saham telah menyebabkan perdebatan di antara pendukung behavioral finance dan keuangan neoklasik. Penelitian menggunakan pooled ordinary least square dengan menggunakan fixed effect model untuk menganalisis hubungan antara sentimen investor terhadap harga saham selama periode penelitian. Sampel penelitian adalah perusahaan yang membagikan dividen setiap tahun. Penelitian dilakukan pada 51 perusahaan yang terdaftar di Bursa Efek Indonesia selama periode tahun 2006-2010. Hasil penelitian menunjukkan bahwa sentimen investor memiliki pengaruh yang signifkan terhadap harga saham.

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Recent literature in behavioral finance has contradicted efficient market theory. Psychological biases which are influencing both the behavior of investors and asset prices has led to a strong debate among proponents of behavioral finance and neoclassical finance. This study conduct pooled ordinary least squares estimator by using a fixed effect model to analyze the relationship between investor sentiments on stock prices during the research period. Study sample is a company that distribute dividends every year. The study was conducted on 51 companies listed on the Indonesia Stock Exchange during the period 2006-2010. The results suggest that investor sentiment has significant influence on stock prices."

"Nilai harga saham di Bursa Efek Indonesia (BEI) terkadang mengalami perubahan yang fluktuatif tergantung dari kondisi perekonomian indonesia yang juga dipengaruhi oleh kondisi perekonomian global. Diversifikasi merupakan suatu hal yang tepat dalam mengatasi kondisi yang kurang tepat ketika adanya kondisi global yang tidak menentu terutama faktor perekonomian. Reksa Dana adalah instrumen pasar modal yang diatur oleh Manajer Investasi (MI) namun sifat mekanisme transaksinya diperjual belikan oleh dealer partisipan pada pasar primer. Exchange-Traded Fund (ETF), salah satu produk Reksa Dana yang karakteristiknya berbeda terutama dari segi mekasnisme jual belinya dan kehadirannya masih baru di Indonesia dan saat pengerjaan penelitian ini yang terdaftar di BEI yang berjumlah 45 ETF. Nilai Aktiva Bersih (NAB) pada ETF memiliki perbedaan dengan harga pasarnya, namun jika berdasarkan Efficient Market Hypotesis menjelaskan nilai intrinsik suatu sekuritas mencerminkan harga pasarnya. Maka untuk melihat terkait masalah tersebut pada tesis ini bertujuan untuk melakukan analisis faktor disparitas yang dapat berpengaruh antara NAB pada ETF dengan harga pasarnya dengan menggunakan data sekunder. Metode yang dilakukan dengan regresi Ordinary Least Square (OLS) dengan hipotesis penelitian yaitu faktor disparitas meliputi fund age, volume, selisih high dan low price, dan return IHSG. Hasil penelitian ini menemukan bahwa fund age, volume, selisih high dan low price tersebut berpengaruh signifikan terhadap perbedaan harga terhadap NAB (mispricing ETF) dengan R squared sebesar 3.13 % yang tidak jauh berbeda dengan peneltian Atanasova dan Weisskopf (2020) dan penelitian Shin dan Soydemir (2010). Implikasi penelitian ini memberikan gambaran pada investor, Manajer Investasi, dan dealer partisipan untuk berinvestasi dan mengembangkan ETF di Indonesia.

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The value of share prices on the Indonesia Stock Exchange (IDX) sometimes fluctuates depending on the condition of the Indonesian economy which is also influenced by global economic conditions. Diversification is the right thing to overcome inaccurate conditions when there are uncertain global conditions, especially economic factors. Mutual Funds are capital market instruments that are regulated by the Investment Manager (MI) but the nature of the transaction mechanism is traded by and participating dealers in the primary market. Exchange- Traded Fund (ETF), one of the Mutual Fund products with different characteristics, especially in terms of its trading mechanism and its new presence in Indonesia, and at the time of this research were listed on the IDX, totaling 45 ETFs. Net Asset Value (NAV) in ETF is different from its market price, however, based on the Efficient Market Hypothesis, it explains that the intrinsic value of a security reflects its market price. So to see the cause of this issue, the objective of this thesis is to analyze the disparity factors that can affect the NAV in ETFs and their market prices using secondary data. The method used is Ordinary Least Square (OLS) regression with the research hypothesis that disparity factors include fund age, volume, the difference between high and low price, and IHSG return. The result of this research found that fund age, volume, the difference between high and low price had a significant effect on the difference in price on NAV (mispricing ETF) with R squared about 3.13% which is similar to previous reseach by Atanasova dan Weisskopf (2020) and another previous research by Shin dan Soydemir (2010). The implication of this research is to provide an overview of participating investors, investment managers and dealers to invest in and develop ETFs in Indonesia."

"Meskipun pengumuman pemecahan nilai nominal saham tidak memiliki nilai ekonomis secara langsung bagi emiten, seringkali ditemukan fenomena tidak wajar ketika tejadi peningkatan harga saham dan reaksi pasar yang ditunjukkan dengan adanya imbal hasil tidak normal yang positif. Salah satu teori yang dapat menjelaskan reaksi pasar tersebut adalah teori sinyal. Teori ini mengemukakan bahwa manajemen menggunakan pengumuman ini untuk menyampaikan informasi privat yang menguntungkan kepada pasar yaitu mengenai prospek laba perusahaan. Penelitian ini bertujuan untuk menganalisis ada atau tidaknya reaksi pasar atas informasi privat yang terkandung di dalam pengumuman, ada atau tidaknya manajemen laba di sekitar pengumuman dan pengaruh rasio pemecahan nilai nominal terhadap reaksi pasar. Sampel penelitian terdiri dari 47 perusahaan non-keuangan yang terdaftar di Bursa Efek Indonesia dari tahun 2002-2008.Hasil penelitian menunjukkan bahwa pasar bereaksi positif atas informasi privat yang terkandung di dalam pengumuman. Respon positif ini menandakan bahwa pengumuman stock split mengandung informasi privat yang menguntungkan dari para investor. Selain itu, perusahaan juga melakukan manajeman laba di tahuntahun sebelum pengumuman dengan tujuan untuk menyampaikan informasi privat yang menguntungkan tersebut. Rasio pemecahan yang digunakan sebagai proksi informasi privat memiliki pengaruh positif terhadap reaksi pasar.

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Although stock split announcement has no economic value directly to the company, often found unusual phenomenon occurs when increasing in stock price and market reaction is indicated with the presence of abnormal returns are positive. One theory that can explain this market reaction is a signaling theory. This theory suggests that management uses this announcement to convey private information that is favorable to the market about the prospects for corporate earnings. This study aims to analyze the existence of market reaction to private information contained in this announcement, the existence of earnings management around the announcement and the effect of stock split size on the market reaction. Sample of study is consisted of 47 non-financial companies listed in Indonesia Stock Exchange from 2002-2008.The results shows that the market reacted positively to the private information contained in this announcement. This positive response indicates that the stock split announcements contain information that benefit for investors. In addition, the company also conducts management earnings in the years prior to the announcement in order to convey favorable private information. Split size is used as a proxy for private information has a positive effect on market reaction."