Judul: Analisis Risiko dan Optimasi Kinerja Portofolio Investasi Dana Pensiun Pertamina.
Abstrak: Pengelolaan investasi perusahaan dana pensiun dilakukan dengan tujuan menghasilkan return optimal sesuai dengan peraturan perundang-undangan dan investment policy perusahaan agar terciptanya Good Pensiun Fund Governance (GPFG) serta Risk Management. Penelitian ini bertujuan untuk : (1) Mengevaluasi kinerja portofolio investasi Dana Pensiun Pertamina, (2) Menganalisis pengaruh return instrumen investasi terhadap return portofolio investasi, (3) Menganalisis komposisi alokasi portofolio investasi optimal dengan batasan alokasi investasi serta mengestimasi kebutuhan dana untuk mitigasi risiko. Data yang digunakan adalah data sekunder. Metode analisis yang digunakan adalah Single Index Model, Analisis Regresi Linier Berganda, serta Analisis Value at Risk (VaR). Berdasarkan Analisis Single Index Model, portofolio optimal terdiri atas 14.96% deposito, 16.84% saham, 21.33% obligasi, 22.25% Surat Berharga Negara (SBN), 17.53% sukuk, 1.57% penempatan langsung, serta 5.53% tanah dan bangunan. Return dan risiko dari portofolio optimal sebesar 5.52% dan 0.015. Hasil Analisis Value at Risk (VaR), probabilitas kerugian maksimal yang akan terjadi sebesar Rp 184 983 079 820.
Keyword: dana pensiun, portofolio investasi, portofolio optimal, return, risiko

Judul: Analisis Risiko Portofolio Investasi pada Perusahaan Asuransi Umum
Abstrak: Investasi oleh perusahaan asuransi kerugian, disusun sesuai tujuan memaksimumkan tingkat imbalan, mengoptimalkan kinerja portofolio, atau meminimumkan risiko yang berpedoman pada investment policy perusahaan dan berjangka pendek serta berisiko rendah. Penelitian dilakukan pada salah satu perusahaan dalam kelompok asuransi umum berpremi bruto diatas satu miliar rupiah. Penelitian ini bertujuan (1) mengevaluasi profil dan kinerja investasi yang telah dilakukan oleh perusahaan, (2) menyusun portofolio optimal investasi perusahaan berdasarkan Single Index Model dalam kerangka kebijakan investasi perusahaan dan mengestimasi kebutuhan pencadangan untuk mitigasi risiko, (3) mengidentifikasi kesenjangan portofolio dari kebijakan investasi perusahaan. Data yang digunakan merupakan data primer data sekunder. Metode analisis yang digunakan adalah analisis deskriptif, analisis Single Model Index dan analisis Value at Risk metode Varian-Kovarian. Perusahaan ini memiliki total alokasi aset investasi rata-rata bulanan sebesar Rp1 169 298 310 000, dialokasikan pada deposito, obligasi, dan ekuitas. Hasil penelitian menyatakan bahwa portofolio optimal memiliki expected return bulanan yang lebih tinggi, varians return bulanan yang lebih rendah, rasio kinerja yang lebih tinggi serta kebutuhan pencadangan mitigasi risiko yang lebih rendah dari existing potfolio.
Keyword: asuransi umum, risiko, return, portofolio optimal, risiko portofolio, VaR

Judul: Xylooligosaccharide production of corncobs as prebiotic candidate by high temperature heating and enzymatic hydrolysis.
Abstrak: Corncob waste is a rich xylan source that can be utilized as raw material for xylooligosaccharides (XOS) production. XOS is a potential prebiotic and has high economic value. Two corn varieties i.e. Bisi and Pioneer were first analyzed for its hemicellulose, cellulose and lignin contents and xylan yield to choose the corn variety to be studied. Process technology for XOS production was studied using available equipment such as oven. Xylooligosaccharide (XOS) from corncob was produced in two stages i.e. xylan extraction by heating at high temperatures in oven or autoclave as comparison, followed by enzymatic hydrolysis. Analysis of two corncob varieties showed that Pioneer variety contained higher hemicellulose content (34.98%) and xylan yield (18.32%) than Bisi variety (12.28% and 10.22%, respectively), therefore Pioneer variety was chosen as raw material for XOS production. Corncob particles were soaked in dilute acid (1 g/l H2SO4) for 12 h at 60 oC, filtered and washed with tap water and then heated in oven or autoclave. Before oven heating, The corncobs were added with water at various ratios (1:1 – 1:5) and then heated in oven at various temperature (130 oC, 140 oC, 150 oC for 0.5 h) and autoclave at 121oC for 0.5, 1, 1.5 and 2 h with one and two heating cycles. During heating, the total sugar and reducing sugar were increase, while the degree of polymerization was decrease. The results showed that heating in oven to extract the xylan was affected by the ratios of corncobs and aquadest and heating temperatures. Oven heating (130-150 oC) with optimum ratio of corncobs and aquadest (1:3) successfully increased the xylan content from 3.98% up to 18.21 – 19.46% while repeated heating cycle (two cycles) did not affect the xylan content. Heating the corncobs with aquadest (at the ratio of 1:3) in oven at 130 oC for 0.5 h produced 18.98% xylan and enzymatic conversion of the xylan by xylanase significantly increased the XOS content from 19.60% up to 44.06%. Heating the corncobs in autoclave (121 oC, 0.5 h) followed by enzymatic conversion produced higher XOS content (65.67%). The corncob XOS could stimulate the growth of Lactobacillus plantarum kik and Bifidobacterium longum ATCC 15707 by 1.2 until 1.7 unit log, indicating the prebiotic properties. Cookies prebiotic produced by addition of 5% (based on wheat flour) had higher hardness texture (1256 gf) than control without XOS (1067 gf).
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