Market timing prediction of stock investment is an important decision problem with uncertainty and risk in the financial activity.An algorithm for market timing prediction of stock investment is proposed in this paper...Market timing prediction of stock investment is an important decision problem with uncertainty and risk in the financial activity.An algorithm for market timing prediction of stock investment is proposed in this paper.Considering the close relationship in the stock market and the economic data,we find the correlation of synthetical economic data and the equity returns with the help of the combination of fuzzy logic and genetic algorithm.Finally,the application of stock market is included to test the effectiveness of the algorithm.展开更多
This paper concerns with modeling and design of an algorithm for the portfolio selection problems with fixed transaction costs and minimum transaction lots. A mean-variance model for the portfolio selection problem is...This paper concerns with modeling and design of an algorithm for the portfolio selection problems with fixed transaction costs and minimum transaction lots. A mean-variance model for the portfolio selection problem is proposed, and the model is formulated as a non-smooth and nonlinear integer programming problem with multiple objective functions. As it has been proven that finding a feasible solution to the problem only is already NP-hard, based on NSGA-II and genetic algorithm for numerical optimization of constrained problems (Genocop), a multi-objective genetic algorithm (MOGA) is designed to solve the model. Its features comprise integer encoding and corresponding operators, and special treatment of constraints conditions. It is illustrated via a numerical example that the genetic algorithm can efficiently solve portfolio selection models proposed in this paper. This approach offers promise for the portfolio problems in practice.展开更多
Objective： The aim of this study was to evaluate clinical efficacy of nutritional therapy with Kabiven PI and w-3 fish oil fat emulsion on advanced stage of malignant tumor, Methods： One hundred and fifity-seven pat...Objective： The aim of this study was to evaluate clinical efficacy of nutritional therapy with Kabiven PI and w-3 fish oil fat emulsion on advanced stage of malignant tumor, Methods： One hundred and fifity-seven patients with advanced stage of malignant tumor were performed parenteral nutrition and enteral nutritional adjunctive therapy with Kabiven PI and w-3 fish oil fat emulsion （according to the amount to heat of 20 kcal/kg a day and the nitrogen of 7g/m2.SA）. Results： The ECOG ≥ 3 of 103 cases, therapy interval 2-3 weeks, declined 1 score. 28 were performed with chemotherapeutics under nutritional therapy 2-4 periodical. 25 of 26 died were dead for cancer cachexia and multiple organ failure. Survival time was 2-7 months, No serious complications occurred in all patients, Conclusion： The symptom and quality of life of advanced stage of malignant tumor were obviously improve by nutritional therapy. The opportunity for therapy tumor was offered. It is a important method on combined therapy of malignant tumor.展开更多
Many stock exchanges around the world enforcing daily price limits on the amount asset prices can change to prevent the market from overreacting and to reduce volatility. Price limits are artificial boundaries set by ...Many stock exchanges around the world enforcing daily price limits on the amount asset prices can change to prevent the market from overreacting and to reduce volatility. Price limits are artificial boundaries set by market regulators who restrict price changes of a stock to a pre-specified range during a trading day or a single trading session. The primary aim of price limit rules is to stabilize the markets during panic trading, to moderate vitality by repressing excessive speculation, and to allow stocks to be traded at prices close to their fair value. However, their impact on the market is a somewhat unresolved issue （Harris, 1998）. Using a methodology of comparing volatility based on the extreme value technique, the authors empirically investigate the impact of price limits on the volatility of the Stock Exchange of Thailand. The empirical results support price limits advocates, suggesting that price limits rules moderate stock price volatility.展开更多
This paper analyzed in depth the difference between the pricing of non- performing loan （NPL） securitization and that of ordinary asset securitization. It has explained the pricing thought and method of non-performi...This paper analyzed in depth the difference between the pricing of non- performing loan （NPL） securitization and that of ordinary asset securitization. It has explained the pricing thought and method of non-performing loan backed securities in connection with the particularity and complexity of non-performing loan and finally proposed some key problems which need to be emphasized during the pricing practice of non-performing loan backed securitization.展开更多
基金National Natural Science Foundation of China!(No.69874 0 2 8)
文摘Market timing prediction of stock investment is an important decision problem with uncertainty and risk in the financial activity.An algorithm for market timing prediction of stock investment is proposed in this paper.Considering the close relationship in the stock market and the economic data,we find the correlation of synthetical economic data and the equity returns with the help of the combination of fuzzy logic and genetic algorithm.Finally,the application of stock market is included to test the effectiveness of the algorithm.
文摘This paper concerns with modeling and design of an algorithm for the portfolio selection problems with fixed transaction costs and minimum transaction lots. A mean-variance model for the portfolio selection problem is proposed, and the model is formulated as a non-smooth and nonlinear integer programming problem with multiple objective functions. As it has been proven that finding a feasible solution to the problem only is already NP-hard, based on NSGA-II and genetic algorithm for numerical optimization of constrained problems (Genocop), a multi-objective genetic algorithm (MOGA) is designed to solve the model. Its features comprise integer encoding and corresponding operators, and special treatment of constraints conditions. It is illustrated via a numerical example that the genetic algorithm can efficiently solve portfolio selection models proposed in this paper. This approach offers promise for the portfolio problems in practice.
文摘Objective： The aim of this study was to evaluate clinical efficacy of nutritional therapy with Kabiven PI and w-3 fish oil fat emulsion on advanced stage of malignant tumor, Methods： One hundred and fifity-seven patients with advanced stage of malignant tumor were performed parenteral nutrition and enteral nutritional adjunctive therapy with Kabiven PI and w-3 fish oil fat emulsion （according to the amount to heat of 20 kcal/kg a day and the nitrogen of 7g/m2.SA）. Results： The ECOG ≥ 3 of 103 cases, therapy interval 2-3 weeks, declined 1 score. 28 were performed with chemotherapeutics under nutritional therapy 2-4 periodical. 25 of 26 died were dead for cancer cachexia and multiple organ failure. Survival time was 2-7 months, No serious complications occurred in all patients, Conclusion： The symptom and quality of life of advanced stage of malignant tumor were obviously improve by nutritional therapy. The opportunity for therapy tumor was offered. It is a important method on combined therapy of malignant tumor.
文摘Many stock exchanges around the world enforcing daily price limits on the amount asset prices can change to prevent the market from overreacting and to reduce volatility. Price limits are artificial boundaries set by market regulators who restrict price changes of a stock to a pre-specified range during a trading day or a single trading session. The primary aim of price limit rules is to stabilize the markets during panic trading, to moderate vitality by repressing excessive speculation, and to allow stocks to be traded at prices close to their fair value. However, their impact on the market is a somewhat unresolved issue （Harris, 1998）. Using a methodology of comparing volatility based on the extreme value technique, the authors empirically investigate the impact of price limits on the volatility of the Stock Exchange of Thailand. The empirical results support price limits advocates, suggesting that price limits rules moderate stock price volatility.
文摘This paper analyzed in depth the difference between the pricing of non- performing loan （NPL） securitization and that of ordinary asset securitization. It has explained the pricing thought and method of non-performing loan backed securities in connection with the particularity and complexity of non-performing loan and finally proposed some key problems which need to be emphasized during the pricing practice of non-performing loan backed securitization.
