【摘 要】
：
The risk and performance of ST stocks are studied. The SVM method is applied on 100 general stocks and 100 ST stocks selected from the website, and a criterion
【机 构】
：
School of Science,School of Management
论文部分内容阅读
The risk and performance of ST stocks are studied. The SVM method is applied on 100 general stocks and 100 ST stocks selected from the website, and a criterion is gotten to select stocks, then the risk of these sample stocks is analysed. In the performance evaluation, the SVM method is also applied on the 100 general stocks and 100 ST stocks according to the return per share, and 57 stocks which are all + 1 are selected. Their equally weighted return rate is only -0.02%, but equally weighted return rate of 31 general stocks is 13.23%, that of 26 ST stocks is -96.15%. Naturally, we conclude that ST stocks are unsteady and do not deserve long-term investment. From the Chinese fund website, we know that equally weighted return rate of stock fund in 2004 was -3.3%, so the equally weighted return rate of the selected stocks (except ST stocks)is much higher than that of average return rate.
其他文献
A new piezoelectric pump can pump liquid either forward or backward and adjust the flow rate. Thus an object can be driven forward or backward at different spee
伴随着离子束生物技术的广泛应用,国内许多单位开展了低能离子注入植物种子的实验研究.其中关于低能离子注入植物种子诱变的物理机理,集中在离子注入的深度-浓度分布上.一些
Two xanthan gum derivatives hydrophobically modified by 4 or 8 tetradecyl chains per 100 xanthan gum structure units were synthesized. The derivatives were stud
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7
Without using any turbulent model, direct numerical simulation of a three-dimensional gas-solid two-phase turbulent jet was performed by finite volume method. T
A novel smoothness term of Bayesian regularization framework based on M-estimation of robust statistics is proposed, and from this term a class of fourth-order
Based on the 500-hPa geopotential height field series of T106 numerical forecast products, by empirical orthogonal function (EOF) time-space separation, and on
The transient critical boundary of dynamic security region (DSR) can be approximated by a few hyper planes correlated with instability separation modes. A metho
Terahertz time-domain spectroscopy (THz-TDS) is a new technique in studying the conformational state of a molecule in recent years. In this work, we reported th
The stress-induced phase transformation in incompressible materials and the interfacial stability of multi-phase deformation were studied. The existence of mult