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1、摆渡论文网（）-专业留学生作业辅导中心商科paper写作-金融证券的投资收益与风险金融市场是一个高风险市场，衡量金融市场风险的方法很多。其中，上世纪90年代出现的VaR方法是金融界最流行的方法之一。证券市场是金融市场的核心部分之一。对于广大投资者来说，正确认识和防范市场风险，加强风险管理具有重要的现实意义。证券投资不仅要考虑投资回报率，还要注意投资风险。证券投资的核心和关键是有效开展投资多元化，通过投资多元化，分散风险，提高收益。只有正确分析和把握证券投资风险，证券投资者才能在固定收益率条件下实现风险最小化，在一定风险条件下实现收益率最大化。证券投资组合是指投资者在综合分析证券的风险程度和总收
2、益的前提下，根据一定的原则做出适当的投资选择，证券投资收益一般以收益率表示。证券投资者投资是为了获得更高的投资回报。一方面，它希望在相同的风险条件下最大化收益。另一方面，对于相同回报的预期，风险是最小的。一般来说，证券的预期收益率越高，其投资风险就越大。收益和风险是证券投资的核心要素，找到它们的变化规律，并对其进行定量测量，是证券投资分析和选择的重要前提。此外，收益与风险并不孤立，两者之间有着密切的联系。我们知道，投资者推迟消费并获得所需的回报率，但存在时间、通货膨胀和未来支付的不确定性。因此，在选择投资机会时，需要对各种投资机会的预期收益和风险之间的替代进行估计和评估。准确衡量投资机会的回报
3、和风险对于投资分析和评价具有重要意义。Financial market is a high-risk market, and there are many methods to measure the risk of financial market. Among them, var method, which emerged in the 1990s, is one of the most popular methods in the financial world. Securities market is one of the core parts of the financial ma
4、rket. For the majority of investors, it is of great practical significance to correctly understand and prevent market risks and strengthen risk management. Securities investment should not only consider the return rate of investment, but also pay attention to the risk of investment. The core and key
5、 of securities investment is to effectively carry out the diversification of investment, through the diversification of investment, to spread the risk and improve the return. Only by correctly analyzing and grasping the risk of securities investment, can securities investors realize the minimization
6、 of risk under the condition of fixed rate of return, or the maximization of rate of return under the condition of certain risk. Portfolio of securities refers to that investors make appropriate investment choices according to certain principles on the premise of comprehensive analysis of the risk d
7、egree and total return of securities, and the return of securities investment is generally expressed by the rate of return. Securities investors invest in order to obtain higher investment returns. On the one hand, it hopes to maximize the benefits under the same risk conditions. On the other hand,
8、the expectation of the same return, the risk is minimal. Generally speaking, the greater the expected yield of securities, the greater the risk of its investment. Income and risk are the core elements of security investment, and finding their changing rules and accurately measuring them quantitative
9、ly are the important preconditions for investment analysis and selection. In addition, return and risk are not isolated, there is close connection between them. We know that investors delay consumption and obtain the required rate of return, but there are uncertainties of time, inflation and future
10、payment. Therefore, when they choose investment opportunities, they need to estimate and evaluate the substitution between expected returns and risks of various investment opportunities. It is very important to accurately measure the return and risk of investment opportunity for investment analysis
11、and evaluation.The historical average return rate of a portfolio is measured by the weighted average return rate of a single asset in the portfolio, or by the total change in the initial value of the portfolio. The weight used to calculate the mean is related to the initial market value of each asse
12、t, so the average yield calculated is called the value-weighted average yield.The sample data were selected from the closing prices and share Numbers of 240 trading days between 2009-4-24 and 2010-4-23 of CGA, jinbei automobile, wantong expressway, vanke, wisco, western mining, China unicom, aluminu
13、m corporation of China, sinopec and China overseas development. EXCEL software was used to process and calculate the sample data.Sample data were selected between 2009-4-24 to 2009-4-24 to send shares, jinbei automobile, anhui highway, vanke shares, wisco, western mining, China unicom, China aluminu
14、m corporation, China petrochemical, China shipping development of these ten stocks 240 trading days of the opening and closing, use their yield calculation formula: the day respectively, calculate the daily yield, and the E (R), Var (R), one of the said securities I the yield of the first day of t;
15、Represents the closing price of the security on day t; Represents the closing price of securities I t-1, and assumes that the opening price is equal to the closing price of the previous day; Represents the dividend of security I in the trading day, if no dividend, then. EXCEL software was used to pr
16、ocess and calculate the sample data.Sample selection. The following data select the weekly opening price and weekly closing price of five stocks, including China grand auto, jinbei automobile, aluminum corporation of China, wantong stock and vanke stock, every five days from 2009-4-23. A total of 48 weeks data are used as the sample data.From 2009-4-23, the weekly opening price and weekly closing price of five stocks of China grand finance, jinbei a
