Judul: Portfolio Selection using Best Beta
Abstrak: An investor, who will make decision on investing his capital, usually considers a model. This model is called Capital Assets Pricing Model (CAPM). This model explains how an investor can calculate his expected returns. The CAPM gives prediction about relationship between risk and expected returns. The CAPM has beta parameter which refers to a measure of risk. By incorporating a target variable into the investor preferences, a best-beta CAPM (BCAPM) can be derived. BCAPM maintains the CAPM’s theoretical properties and analytical simplicity, yet unambiguously improves its pricing accuracy. By calibrating the US historical data to the model, it is found that the BCAPM typically improves the pricing accuracy of the CAPM by 20% to 30% annualy. Both the CAPM and the BCAPM predict a linear relation between assets’ risk premiums and beta. The aim of this study is to derive a simple variation of the CAPM, which called BCAPM. In both models there are possibly pricing errors. Alpha is defined as pricing errors between the true expected returns and predicted expected returns. This model gives a relationship between alpha on CAPM and alpha on BCAPM. If there are pricing errors, this model shows that alpha on BCAPM is smaller than alpha on CAPM for all assets.
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Judul: Evaluation of Optimal Stock Portfolio Performance By Grouping Issuers Based on Stock Price Movements
Abstrak: The increase in investors inthe capital market can be a positive thing, but there needs to be more understanding for novice investors so that they are not affected by the stock "pompom". Knowledge in the stock analysis is an important variable for investment decisions and a guide ingiving confidence to investors to make investment decisions. What's more, the stock investment carries the wrong risk as a result of changes in stock prices that occur in trading on the stock exchange every day, thus affecting the rate of return which also changes. Investors will face uncertainty in making choices and evaluating future performance, uncertain returns, and because of the risks that affect them. Based on this, there are problems in risk assessment faced by investors. This problem can besolved by taking a calculation approach in selecting stocks and determining the optimal portfolio, the risk in investing can be reduced by investing in various types of stocks, namely by forming an optimal stock portfolio and evaluating the portfolio. Investors cannot measure portfolio performance only by looking at the amount of return, but also by paying attention to the risks they will bear. The optimal portfolio in this study is carried out by utilizing the advantages of the single-index model, namely by calculating the variance of a portfolio from the relationship between the return of each stock and the market return index. Beta. Four stocks were recommended as optimal portfolios that have the largest return to beta value and have good stock portfolioperformance, namely MEGA, JECC,UNIC, and KICI stocks. The recommended stocks move in different fields and sectors with negative correlation valuesand different proportions so that the returns and risks obtained are different in each field and sector sothat the risk of loss of one stock can be neutralized with the gain of the stock. other. These shares have also been in operation for quite a long time and have been listed on the IDX for more than 20 years with a trend that tends to be positive in the last 5 years so these shares are worthy of being considered as a portfolio for investing in stocks
Keyword: Single Index Model, Treynor, Dynamic Time Wraping

Judul: Infectious laryngo tracheitis pada unggas
Abstrak: Infectious Laryngo Tracheitis merupakan penyakit pada unggas yang disebabkan oleh virus yang mempunyai sasaran saluran pernapasan bagian atas Penyebab penyakit Infectious Laryngo Tracheitis Univers (ILT) adalah virus yang termasuk kelompok virus Herpes sering disebut Tarpeia avium. Virus tersebut tersusun dari inti asam deoksi ribonukleat yang dilengkapi dengan pembung- kus yang merupakan derivat dari lemak serta mempunyai garis tengah antara 195-250 nano meter. Pada temperatur kamar virus tersebut dapat bertahan selama 15 hari dalam keadaan tanpa pengawetan. Virus penyebab Infectious Laryngo Tracheitis mempunyai kepekaan terhadap zat kimia golongan pelarut lemak seperti: phenol dan kresol. Induk semang definitip penyakit Infectious Laryngo Tracheitis adalah ayam, tetapi burung merak, itik dan kalkun pernah dilaporkan dapat terinfeksi. Mammalia dan golongan rodensia merupakan hewan yang tahan terhadap infeksi penyakit ini. Pada manusia penyakit Infectious Laryngo Tracheitis diduga mempunyai hubungan dengan timbulnya gangguan neuralgia yang bersifat sub-akut akibat infeksi virus Herpes jenis lain yang disebut virus Sub-acute Myelo Optico Neuropathi (virus SMON).
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