交易成本调整能够改善期权市场质量吗?——来自上证50ETF期权市场的经验证据

为了考察境内交易所交易经手费政策对期权市场的影响机制,本文以上证50ETF期权为研究对象,选取成交量、成交持仓比和波动率作为期权活跃度、投机性和波动性的度量指标,利用期权历史交易数据实证分析上证50ETF期权交易经手费的调整对期权市场质量的影响。结论表明,交易经手费对市场成交量和投机性具有反向影响,对波动性具有非对称的正向影响;下调交易经手费提高了市场信息效率和投机性水平,平抑了市场的过度波动,从而提升了期权市场的整体质量。     

商品期货价格期限结构隐含交易策略信息的实证研究

本文采用静态和滚动主成分分析的方法对最具代表性的9个品种商品期货价格期限结构进行了分析,得出我国商品期货价格期限结构变动的3个主要特征:曲线的平移、斜率的变化以及曲率的变化。在揭示不同变动方式的信息价值的基础上,本文提出多头、多头或者空头、多空平衡3种交易策略,并通过构建两个商品组合与基准持有策略收益进行了比较分析。结果表明,基于商品期货价格期限结构的隐含信息而构建的交易策略收益显著超过基准持有策略的收益。这对于交易者制定正确的交易策略具有重要的意义。     

价格跳跃对我国股指期货市场的影响研究

流动性、波动率及交易活跃度是金融市场微观结构研究中的三个热点问题,在实际的金融市场上也得到了极大关注。利用沪深300股指期货的高频数据,检测出股指期货价格发生跳跃的交易日,并运用Granger因果检验方法研究了跳跃发生日和无跳跃发生日中,市场流动性、波动率及交易活跃度这三个指标之间的相互因果关系。实证结果表明,无论价格是否发生跳跃,我国股指期货市场上的流动性与波动率及流动性与成交量指标之间均存在双向的Granger因果关系。而衡量期货市场交易活跃度的另一重要指标——持仓量,在无跳跃发生时可引导流动性和波动率指标,但在有跳跃发生时这些因果关系消失。     

中美利差对我国债券市场境外投资者行为的影响

文章简述中美利差定价的主要因素,总结我国债券市场境外投资者近年来配置习惯、交易活跃度、投资者结构等特征,归纳境外投资者的交易策略。最后结合近年中美利差收窄的历史经验和今年来的市场变化,推论境外投资者的行为并非简单跟随中美利差走势,外资增配我国债券市场的空间仍然较大。     

股指期货与现货市场的关系研究

本文从市场结构、交易执行效率和市场信息传播三个方面，由浅入深地展开了期现货市场关系的梳理和分析。股指期货市场的出现，一是使得原本现货市场单轨运行的市场结构变为了期现货市场双轨运行的新结构，增加了市场稳定性；二是依托期货交易方式的独特机制，大大提高了交易执行效率；三是期货价格也因此包含了更多内容，促进了市场信息的传播与扩散。同时，股指期货的独特设计使得其非常适合在危机条件下充分发挥功能，是一个重要的风险管理工具，已经成为现代资本市场的重要组成部分和基础性的内在稳定机制。     

我国期货市场期货价格发现功能的实证研究——以上海期货交易所燃料油期货为例

<正>一、摘要本文通过建立带有滞后项的线性回归模型,来研究上海期货交易所燃料油期货货合约交易价格与黄埔现货价格之间的引导关系,以此来研究我国期货市场的价格发现功能。主要结果表明燃料油期货交易价格受到自身过去交易价格和燃油现货当前交易价格的双重影响,而燃油现货价格则仅受当前期货价格的影响,表明了燃油期货价格对燃油现货价格有更强的引导作用,表明了燃油期货价格发现功能的存在。所谓价格发现(price discovery),是指期货市场通过公开公正和高效竞争的期货交易运行机制,形成具有真实性、预期性、连续性和权威性价格的过程。     

限制交易政策如何影响期现关系?——对股指期货价格发现功能的实证检验

本文利用2015年中国股市大幅下跌期间,对股指期货严格限制交易政策这一独特事件前后的高频数据,研究限制交易政策对股指期货与股票市场价格引导关系的影响。利用I-S模型和分位数回归方法的实证结果表明:限制交易政策实施前,股指期货对股票市场的价格影响更强,尤其表现在价格急剧下跌时期;限制交易政策显著增加了期货市场交易成本,从而降低了期货市场的信息份额,削弱了其对股票市场的价格影响,并且改变了期货价格对现货价格“助跌强于助涨”的影响模式,增强了股指期货在价格上涨时对股票市场的影响。研究结果一方面直接量化了期货交易成本变动对其价格发现功能的负面影响,另一方面也从价格引导关系的视角提供了股市危机时期股指期货限制交易政策监管效果的实证证据。     

郑州商品交易所棉花期货量价波动传导实证研究

基于郑州商品交易所(CZCE)棉花期货市场日交易数据,构建条件均值方程和条件标准波动方程对交易量、持仓量与棉花期货价格波动关系进行了实证研究。研究结果表明:CZCE棉花期货交易量与价格收益率波动之间存在正相关关系,不可预期交易量的变动对期货价格收益率的信息传导效率明显高于可预期交易量。棉花期货持仓量与价格收益率波动之间存在负相关关系,分解后的可预期持仓量对价格收益率波动存在负向影响,但不可预期持仓量对价格收益率不敏感。就交易量和持仓量对比来看,交易量对期货价格收益率波动的影响更明显。分解后的交易量和持仓量可以更显著地刻画其对期货价格收益率波动的影响。     

期货市场交易结构、价格形成机制及其效率研究

做市商机制和连续竞价机制是现代期货市场主流的两类交易机制，连续竞价机制则成本较低，价格信号反应灵敏；做市商机制透明、公正，市场连续性较好，代表着期货市场交易机制的未来发展方向。通过对期货市场微观交易结构及价格形成机制的模型研究，结合我国的实际情况，比较考察了几种典型的期货交易机制在不同交易结构下的价格形成效率，对我国期货市场转型完善时期具有现实意义。     

股票市场对P2P网贷市场交易活跃度的影响 ——基于"拍拍贷"平台的实证研究

近十年来,P2P网贷作为一种高收益的投资工具在我国得到了蓬勃的发展.论文分析了股票市场变化对P2P网贷市场交易活跃度所造成的影响.通过实证研究发现,股市收益率对P2P网络借贷行为交易活跃度有负向影响,即"牛市"使P2P市场交易活跃度冷却,而股市低迷时则给P2P市场带来交易热度.该结论无论是对P2P平台的自身发展还是监管部门的政策制定都具有一定现实意义.     

Trading frequency and the efficiency of price discovery in a non-dealer market

The increasing popularity of non-dealer security markets that offer automated, computer-based, continuous trading reflects a presumption that institutionally-set trading sessions are economically obsolete. This theoretical paper investigates the effect of the trading frequency, a key feature of the trading mechanism, on the efficiency of price discovery in a non-dealer market. By tracing the market pricing error to the correlation structures of arriving information and pricing errors of individual traders, the effect of diverging expectations on error-based and overall return volatility is isolated. The analysis reveals that, due to a portfolio effect, an increase in the trading time interval has contradictory effects on the portion of return volatility stemming from pricing errors. The greater accumulation of information increases error-based return volatility, but the greater volume and number of traders per session have the opposite effect. The net effect on overall return volatility can go either way. It is found that the return volatility of heavily traded securities is likely to be minimized under continuous trading, but that of thinly traded securities may be minimized under discrete trading at moderate time intervals. The latter is more likely to occur the greater is the divergence of expectations among traders. These findings challenge the presumption that automated continuous trading in a non-dealer market is more efficient than discrete trading for all securities, regardless of trading volume. The findings are applicable to all economies, but have special importance for developing countries where typically a single market is dominated by small issues and a low volume of trade. As a by-product of the analysis, it is shown how to correct the biased estimate of inter-session price volatility when observations are less frequent than the trading sessions themselves.     

期货市场的交易量与价格波动

本文检验了美国期货市场WTI原油、S＆P500指数和10年期国债品种的日内、日间价格波动与日内交易量、隔日交易量之间的关系,发现预期的日内和隔日交易量都有平抑期货市场价格波动的作用,非预期的隔日交易量与期货价格波动之间有正相关关系,非预期的目内交易量对价格波动的影响不显著。从信息对称性的角度分析,预期的交易量中含有更多信息,能抑制期货价格的偏离;非预期的交易量主要由信息反馈者提供,他们往往对期货价格的变动做出过度反应,从而加剧价格波动。     

融资融券对个股交易变化影响的实证研究

文章运用融资融券155只标的证券的截面数据,实证研究了融资融券对个股交易变化的影响.结果发现,融资融券余额对标的股的个股回报率、交易股数、率都具有较为显著的正向作用,分析了导致这一现象出现的原因,并针对如何充分发挥融资融券价格发现功能,平抑股价过度波动提出了相关政策建议.     

The Effect of Option Listing on Bid-Ask Spreads,Price Volatility,and Trading Activity of the Underlying OTC Stocks

This paper examines the changes in spreads, price volatility, and trading activity surrounding option listing for a sample of 144 OTC stocks. For this sample, both price volatility and volume increase, but the evidence on spreads is mixed. The increase in price volatility is attributed primarily to an increase in residual return variances. Furthermore, price volatility increases even after controlling for volume, insider trading, and spreads. Although these variables do not fully explain the causes for the increase in price volatility after option listing, the results suggest that liquidity trading or volume has a stronger effect on price volatility than insider trading. This study also finds that both the number of trades and institutional holdings show substantial increases, which are supportive of the notion that listing of options on OTC stocks attracts more attention.     

Strategic trading, asymmetric information and heterogeneous prior beliefs

We develop a multi-period trading model in which traders face both asymmetric information and heterogeneous prior beliefs. Heterogeneity arises because traders agree to disagree on the precision of an informed trader's private signal. In equilibrium, the informed trader smooths out her trading on asymmetric information gradually over time, but concentrates her entire trading on heterogeneous beliefs toward the last few periods. As a result, the model's volume dynamics are consistent with the U-shaped intraday pattern at the close. Furthermore, the model predicts a positive autocorrelation in trading volume, and a positive correlation between trading volume and contemporaneous price volatility.     

The Informational Role of Option Trading Volume in Equity Index Options Markets

This paper examines the dynamic relations between future price volatility of the S&P 500 index and trading volume of S&P 500 options to explore the informational role of option volume in predicting the price volatility. The future volatility of the index is approximated alternatively by implied volatility and by EGARCH volatility. Using a simultaneous equation model to capture the volume-volatility relations, the paper finds that strong contemporaneous feedbacks exist between the future price volatility and the trading volume of call and put options. Previous option volumes have a strong predictive ability with respect to the future price volatility. Similarly, lagged changes in volatility have a significant predictive power for option volume. Although the volume-volatility relations for individual volatility and volume terms are somewhat different under the two volatility measures, the results on the predictive ability of volume (volatility) for volatility (volume) are broadly similar between the implied and EGARCH volatilities. These findings support the hypothesis that both the information- and hedge-related trading explain most of the trading volume of equity index options.     

Causal and Dynamic Relationships among Stock Returns,Return Volatility and Trading Volume: Evidence from Emerging markets in South-East Asia

This paper examines the causal and dynamic relationships among stock returns, return volatility and trading volume for five emerging markets in South-East Asia—Indonesia, Malaysia, Philippines, Singapore and Thailand. We find strong evidence of asymmetry in the relationship between the stock returns and trading volume; returns are important in predicting their future dynamics as well as those of the trading volume, but trading volume has a very limited impact on the future dynamics of stock returns. However, the trading volume of some markets seems to contain information that is useful in predicting future dynamics of return volatility.     

Futures Trading Activity and Commodity Cash Price Volatility

Abstract:   This paper examines the lead‐lag relationship between futures trading activity (volume and open interest) and cash price volatility for major agricultural commodities. Granger causality tests and generalized forecast error variance decompositions show that an unexpected increase in futures trading volume unidirectionally causes an increase in cash price volatility for most commodities. Likewise, there is a weak causal feedback between open interest and cash price volatility. These findings are generally consistent with the destabilizing effect of futures trading on agricultural commodity markets.     

Volume,volatility and information linkages in the stock and option markets

This paper examines the relationship between option trading activity and stock market volatility. Although the option market is uniquely suited for trading on volatility information, there is little analysis on how trading activity in this market is linked to stock price volatility. The bulk of the discussion tends to focus on whether trading activity in the stock market is informative about stock volatility. To analyze the information in option trading activity for stock market volatility, a sample of 15 stocks with the highest option trading volume is selected. For each stock, it is noted that the trading activities in the put and call option markets have significant explanatory power for stock market volatility. In addition, the results indicate that the call option trading activity has a stronger impact on stock volatility compared with that of the put options. Our results demonstrate that information and sentiment in the option market is useful for the estimation of stock market volatility. Also, the significance of the effects of option trading activity on stock price volatility is observed to be comparable to that of stock market trading activity. Furthermore, the persistence and asymmetric effects in the volatility of some stocks tend to disappear once option trading activity is taken into account.     

Trading mechanisms and trading preferences on a 24-hour futures market: A case study of the Floor/GLOBEX switch on MATIF

MATIF is the only major exchange offering a 24-hour non-interrupted trading cycle accommodating two distinct non-overlapping trading mechanisms. We find that trading volume on the floor is significantly higher than that on GLOBEX around the switch of trading mechanism. GLOBEX is mainly used by institutions to hedge their cash positions. The higher trading volume on the floor may be attributed to several factors: trade immediacy vs. transaction cost, liquidity trading by locals, inertia to trade under a new mechanism, and transparency vs. anonymity. In addition, the floor's open is unique with large interday return volatility.