中国股票市场微观结构的特征分析——买卖报价价差模式及影响因素的实证研究

本文根据股票市场微观结构理论 ,运用高频数据对我国深圳股票市场的买卖报价价差的变动模式进行实证分析 ,同时研究股票买卖报价价差的影响因素和成因 ,并建立和检验相应的模型 ,从而揭示我国股票市场的微观结构特征。     

信用风险溢价还是市场流动性溢价:基于中国信用债定价的实证研究

我国信用债定价与成熟市场国家信用债定价存在显著差异,并未随着经济周期运行中违约风险的变化而产生明显调整。研究发现,我国市场主体普遍存在对信用债刚性兑付的预期,且倾向于采用信用债进行套利交易,这种行为导致信用债信用利差更多体现的是市场流动性溢价,而非信用风险溢价,因而反映市场流动性状况的货币市场利率水平、波动性对信用债定价具有较为重要的影响,而模糊了对手方信用的中央对手方的质押回购制度安排进一步强化了这种影响。     

基于HFA3824用于DSSS的PN序列的研究

住房抵押贷款可以分为传统的“不脱离资产平衡表”型(on-balance-sheet)和新型的“脱离资产平衡表”型(off-balance-sheet)或称之为美国风格的住房抵押贷款两种类型.资产经营融资是住房抵押贷款市场的创新发展,目前已成为一个宽泛的概念,包括了一系列的金融技术. 一般认为是指个别的缺乏流动性的资产和现金流,经过重新安排,由第三者在资产现金流的基础上提供融资,用于描述一系列广泛的商业、管理、会计目标的融资结构.     

Spread behavior around board meetings for firms with concentrated insider ownership

For a set of firms with concentrated insider ownership, we find that (a) the bidask spread changes significantly around the board meeting dates, and (b) the actual number of transactions by insiders increases following the board meetings. We also find that there is a statistically significant relationship between spread and the number of insider trades surrounding the board meeting dates. Furthermore, neither an increase in the number of insider transactions nor any significant relationship between insider trading and the spread is observed for the same set of firms around non-board meeting dates.     

最小价格变动单位的减小对买卖价差日内周期性的影响——来自香港的证据

本文实证分析了香港联交所2006年降低最小价格变动单位(MPV)对股票日内买卖价差的影响。首次检验并拒绝了Foucault等(2005)提出的“收盘买卖价差假说”--他们预测在MPV降低后,收盘时买卖价差相对之前同时段会增大,并给出了若干解释。进一步的回归分析发现,MPV减少后,标准化买卖价差在开盘时变大,在收盘时则变小。这说明在降低MPV的情况下,限价指令交易者调整了他们的日内交易策略。     

Surprise and dispersion: informational impact of USDA announcements

We examine the role of information asymmetry on changes in bid‐ask spreads during major United States Department of Agriculture (USDA) announcements. Our analyses, using corn, wheat, and soybean futures, indicate that information asymmetry is significantly higher on USDA announcement days compared to nonannouncement days. We further observe that the increased information asymmetry prior to news announcements is mainly driven by the divergence in private information possessed by market participants. However, once the USDA news is released, not only the dispersion in investors’ private information but also the surprises in news announcements contribute to increased information asymmetry and widening of bid‐ask spreads.     

Twitter activity,investor attention,and the diffusion of information

We examine the impact of Twitter attention on stock prices by examining over 21 million company‐specific tweets over a 5‐year period. Through a quasi‐natural experiment identifying official Twitter outages, we find that Twitter influences stock trading, especially among small, less visible securities primarily traded by retail investors. In addition, we determine that Twitter activity is associated with positive abnormal returns and when tweets occur in conjunction with traditional news events, more information is spread to investors. Finally, we show that retail investor activity drives the Twitter effect as institutional investors less actively trade the affected stocks.     

A pairs trading strategy based on linear state space models and the Kalman filter

Among many strategies for financial trading, pairs trading has played an important role in practical and academic frameworks. Loosely speaking, it involves a statistical arbitrage tool for identifying and exploiting the inefficiencies of two long-term, related financial assets. When a significant deviation from this equilibrium is observed, a profit might result. In this paper, we propose a pairs trading strategy entirely based on linear state space models designed for modelling the spread formed with a pair of assets. Once an adequate state space model for the spread is estimated, we use the Kalman filter to calculate conditional probabilities that the spread will return to its long-term mean. The strategy is activated upon large values of these conditional probabilities: the spread is bought or sold accordingly. Two applications with real data from the US and Brazilian markets are offered, and even though they probably rely on limited evidence, they already indicate that a very basic portfolio consisting of a sole spread outperforms some of the main market benchmarks.     

SAW多路正交码扩频调制解调器研究

提出了一种直接序列多路正交码扩频调制解调器的声表面波(SAW)实现方案，并给出了相应的实验结果。     

直接序列扩频系统的多次驻留顺序捕获

本文利用矩阵变换方法对多次驻留顺序捕获的平均捕获时间表示式进行了推导,其过程较信号流图法简单。同时还给出了一次、二次及三次驻留顺序捕获系统的平均捕获时间的计算实例。