Question

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投资组合理论是指若干种证券组成的投资组合，其收益是这些证券收益的加权平均数，但是其风险不是这些证券风险的加权平均风险，是对风险管理进行定量分析的理论.投资组合理论的目的是为了在减少成本的风险和增加成本收益之间进行权衡，找到一种最优的组合方案.
本文主要讨论投资组合的一些理论和应用的问题.首先讨论了模型分析、构建和应用；其次根据均值-方差理论和风险偏好，对证券组合风险的分析与最优化选择；最后讨论投资组合理论在中国证券市场的应用.现代投资组合理论是现代金融理论和投资理论的基础，在理论和实践上有着广泛的用.

Answer 1

Portfolio theory is composed of several kinds of securities the portfolio, its yield is the weighted average yield of these securities, but the risk is not risk-weighted average of these securities risk is the quantitative analysis of risk management theory. Portfolio Theory aimed at reducing costs and increasing the risk of cost-benefit trade-off between, to find a best combination of options.
This article focuses on portfolio theory and application of some of the problems. First discuss the modeling, construction and application; Next, the mean - variance and risk preferences, and portfolio risk analysis and optimization options; Finally Portfolio Theory security market of China. modern portfolio theory is the theory of modern financial theory and investment basis, in theory and practice with extensive use.

Answer 2

Portfolio theory is refers to the number of securities investment combination, the benefits of these securities are weighted average income, but the risk is not a weighted average of the risk of these securities are in risk management risk, quantitative analysis theory. Portfolio theory's purpose is to reduce the risks and costs in the tradeoff between the cost income increase, find a optimal combination scheme.
This article mainly discuss some of the portfolio theory and application are discussed. First, construction and application, Secondly according to the mean-variance theory and risk preference of portfolio risk analysis and optimum choice, Lastly discusses portfolio theory in China securities market application. Modern portfolio theory is the modern financial theory and the theory of investment, in theory and practice has been widely used.

Answer 3

分太低了