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資產負債管理的隨機規劃模型在退休基金上的應用 / A stochastic programming model for asset liability management with an application of pension fund陳煌林 Unknown Date (has links)
本論文應用數學規劃建立符合我國法令規範與投資政策說明書之投資政策及風險管理的資產負債管理模型。主要的討論對象為國民年金、公務人員退休撫卹基金與新制勞工退休金。模型中主要透過資產配置的收益與提撥收入維持現金流的平衡,以支應現在或未來的負債。在提出的模型中,採取維持最低基金公積率的策略,以確保長期的償付能力。當償付能力不足時,以政府撥補或是修正提撥率處理巨額的虧損。且使用機率限制式將發生不足的風險控制在可接受的範圍內。因此本論文提出的模型為多階段的有補償的混和整數隨機規劃模型。
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追蹤穩定成長目標線的投資組合隨機最佳化模型 / Stochastic portfolio optimization models for the stable growth benchmark tracking林澤佑, Lin, Tse Yu Unknown Date (has links)
本論文提出追蹤特定目標線的二階段混合整數非線性隨機規劃模型,以建立追蹤目標線的投資組合。藉由引進情境樹(scenario tree),我們將此類二階段隨機規劃問題,轉換成為等價的非隨機規劃模型。在金融商品的價格波動及交互作用下,所建立的投資組合在經過一段時間後,其追蹤目標線的能力可能會日趨降低,所以本論文亦提出調整投資組合的規劃模型。為符合實務考量,本論文同時考慮交易成本、股票放空的限制,並且加入期貨進行避險。為了反應投資者的預期心理,也引進了選擇權及情境樹。最後,我們使用台灣股票市場、期貨交易市場及台指選擇權市場的資料進行實證研究,亦探討不同成長率設定之目標線與投資比例對於投資組合的影響。 / To construct a portfolio tracking specific target line, this thesis studies how to do it via two-stage stochastic mixed-integer nonlinear model. We introduce scenario tree to convert this stochastic model into an deterministic equivalent model. Under the volatility of price and the interaction of each financial derivatives, the performance of the tracking portfolio may get worse when time elapses, this thesis proposes another mathematical model to rebalance the tracking portfolio. These models consider the transactions cost and the limitation of shorting a stock, and the tracking portfolio will include a futures as a hedge position. To reflect the expectation of investors, we introduce scenario tree and also include a options as a hedge position. Finally, an empirical study will be performed by the data from Taiwan stock market, the futures market and the options market to explore the performance of the proposed models. We will analyze how the different benchmarks settings and invest ratio will affect the
value of the tracking portfolio.
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