Regime‐switching in stock index and Treasury futures returns and measures of stock market stress

We investigate bivariate regime‐switching in daily futures‐contract returns for the US stock index and ten‐year Treasury notes over the crisis‐rich 1997–2005 period. We allow the return means, volatilities, and correlation to all vary across regimes. We document a striking contrast between regimes, with a high‐stress regime that exhibits a much higher stock volatility, a much lower stock–bond correlation, and a higher mean bond return. The high‐stress regime is associated with higher average values of stock‐implied volatility, stock illiquidity, and stock and bond futures trading volume. The lagged implied volatility from equity‐index options is useful in modeling the time‐varying transition probabilities of the regime‐switching process. Our findings support the notions that: (1) stock market stress can have a material influence on Treasury bond pricing, and (2) the diversification benefits of combined stock–bond holdings tend to be greater during times with relatively high stock market stress. © 2009 Wiley Periodicals, Inc. Jrl Fut Mark 30:753–779, 2010     

Influence of dividend tax policy tied to investment horizon on stock price stability: Evidence from the 2015 dividend tax reform in China

We examine how the dividend tax cut policy tied to the investment horizon enforced on September 8, 2015, influences stock price stability in China's A-share market. As the new dividend tax policy waives the tax on cash dividends for investors holding a stock for more than a year, it encourages long-term investment behavior. From 2013 to 2017, we find that stock turnover, return volatility, and turnover volatility decrease after the policy enforcement, especially for stocks with high dividend yields. This result shows that dividend tax reforms increase investors' stock investment horizons and help stabilize the market. However, our findings demonstrate that stock crash risk increases after policy enforcement. Further analysis shows that earnings management through real activities manipulation for stocks with a higher dividend yield contributes to an increase in stock crash risk. Therefore, one externality of the dividend tax cut policy tied to the investment horizon is that top managers of firms with a higher dividend yield may take advantage of investors' passive longer-term investment behavior and engage in more earnings management. This result suggests that regulatory agencies should pay attention to top managers' earnings management behavior after enacting policies that encourage long-term investment.     

Is Firm‐specific Return Variation a Measure of Information Efficiency?

The issue of whether firm‐specific return variation measures the private information reflected in stock returns or trading noise is controversial. Using a firm's geographic proximity to its investors as a proxy for a firm's private information, we investigate the relation between firm‐specific return variation and price informativeness. We find that firms located in metropolitan areas experience higher firm‐specific return variation and that holdings and trading by local institutional investors positively affect firm‐specific return variation. These findings suggest that higher firm‐specific return variation is indicative of more informative stock prices.     

Naming Products in China: Local or Foreign Branding

ABSTRACT

This study examines the effect of program trades on the price changes in the Korean stock index futures and spot markets employing intraday return and trading data. Program trades in the Korean stock market create an instant imbalance in market liquidity. However, their impact is very short-lived and limited in an economic sense. Moreover, there is little tendency for market returns to over-react to program trades. An increase in program trades results in higher spot market volatility but does not cause monotonically increasing futures market volatility. Overall, program trades do not destabilize the stock market in Korea despite some positive association between program trades and volatility.     

Risk,external adjustment and capital flows

This paper studies the process of external adjustment. I develop an open economy model with endowment and preference shocks that can account for the empirical behavior of real exchange rates, interest rates and consumption in the U.S. and Europe. The model includes cross border holdings of bonds and equity, and financial frictions that impede international risk-sharing. I find that external adjustment following endowment shocks predominantly takes place via trade flows, consistent with the intertemporal approach to the current account. In contrast, preference shocks that change investors' risk aversion induce adjustment via the trade and valuation channels; where the latter includes the effects of unexpected capital gains and loss on existing cross border holdings and changes in the expected future return differentials between foreign assets and liabilities. The model estimates imply that the valuation channel of external adjustment is more important for the U.S. than the trade channel. Consistent with this implication, I show that forecasts of future return differentials contributed most to the volatility of the U.S. net foreign asset position in the post Bretton-Woods era.     

The Return‐Implied Volatility Relation for Commodity ETFs

We examine the return‐implied volatility relation by employing “commodity” option VIXs for the euro, gold, and oil. This relation is substantially weaker than for stock indexes. We propose several potential reasons for these unusually weak results. Also, gold possesses an unusual positive contemporaneous return coefficient, which is consistent with a demand volatility skew rather than the typical investment skew. Moreover, the euro and gold are not asymmetric. We relate the results to trading strategies, algorithmic trading, and behavioral theories. An important conclusion of the study is that important differences exist regarding implied volatility for certain types of assets that have not yet been explained in the literature; namely, the results in this study concerning commodity ETFs versus stock indexes, plus previous research on stock indexes versus individual stocks, and the pricing of stock index options versus individual stock options. © 2013 Wiley Periodicals, Inc. Jrl Fut Mark 34:261–281, 2014     

基于高频数据的波动率与成交量动态关系研究

传统的价量分析都是从低频数据来分析股票市场上波动率、收益率与成交量之间的关系。基于高频数据,利用分位数回归并结合高频数据的波动率估计方法对高频数据中所呈现出的价量关系进行研究,并分析了股票价格跳跃过程所带来的跳跃方差与成交量之间的关系。实证分析表明：指数及个股收益率与成交量之间的关系并不显著;波动率、跳跃与成交量之间存在着显著相关的关系,个股的波动率与成交量之间的关系显著并呈现出正向相关关系,而指数的波动率与成交量之间呈现出一种负向关系,并且关系比较微弱;个股的成交量的改变会导致股票价格的跳跃方差的减小,而指数的成交量的改变则使得指数的跳跃方差增大。     

Turnover and return in global stock markets

I study how growth affects liquidity of global stock exchanges and how liquidity determines cross-sectional returns on those stock exchange index portfolios. I measure portfolio liquidity by turnover ratio computed as value of shares traded over the market capitalization. I obtain data from FIBV, an association of global stock exchanges. In a multiple regression model for turnover ratio, I find age, size, type of exchange, competition for order flow, and growth rate to be significant determinants of portfolio liquidity; however, exchange- and time-specific effects are more appropriate for modeling portfolio liquidity. The time effects yield to three distinct regimes, while the exchange-specific effects are surrogates for the legal systems, English common law, and Civil laws of the countries. I estimate the parameters of a multiple regression model in a two-stage GLS framework in which index return is a function of turnover. The GLS method is preferable since a turnover ratio may have a non-stationary, random component. The significant determinants of index return are turnover and volatility, although some of the volatility effect may be a spillover from a January effect. Investors expect higher return from high turnover markets. However, the positive turnover expected return relation is true only in emerging markets; in developed markets expected return is a function of volatility. This result confirms existing empirical evidence that high turnover stock portfolios generate superior returns and further the sources and pricing of risk in emerging and developed markets are different.     

Quantile Regression Analysis of the Asymmetric Return‐Volatility Relation

We use quantile regression to investigate the short‐term return‐volatility relation between stock index returns and changes in implied volatility index. Neither the leverage hypothesis nor the volatility feedback hypothesis effectively explains the asymmetric return‐volatility relation. Instead, behavioral explanations, such as the affect and representativeness heuristics, are supported by our results, particularly in the short‐term; the affect heuristic plays an important role. Moreover, in the context of an extreme volatility change distribution, the affect heuristic and time‐pressure dominate. Thus, we observe strong negative and asymmetric relations between each volatility index and its corresponding stock market index. The asymmetry increases monotonically from the median quantile to the uppermost quantile (i.e., 95%); therefore, ordinary least squares (OLS) regression underestimates this relation at upper quantiles. Additionally, the VIX presents the highest asymmetric return‐volatility relation, followed by the VSTOXX, VDAX, and VXN. Finally, the observed asymmetry is more pronounced with the new volatility index measure than with the old, at‐the‐money volatility index measure. © 2012 Wiley Periodicals, Inc. Jrl Fut Mark 33:235–265, 2013     

Introduction

This study decomposes the unconditional stock return volatility into two categories: systematic versus idiosyncratic risk, to re-examine the link between size and risk in the banking industry. The feasibility of the model is tested using data for US banks from 1998 to 2007. The evidence uncovered suggests that the practice of size-related diversification obtained with large banks reduces the firm-specific risk, and thus weakens stock return variances. However, rather than eliminating firm-specific risk, it is being transformed into systematic risk. Additionally, our empirical findings can potentially explain why a bank's size-related diversification does not result in a reduction in its unconditional stock return volatility reported in Demsetz and Straha [Historical patterns and recent changes in the relationship between bank size and risk. Federal Reserve Bank of New York Economic Policy Review, 1(2), 13–26 (1995); Diversification, size, and risk at bank holding companies. Journal of Money, Credit, and Banking, 29, 300–313 (1997)].     

沪深300指数的ARCH效应

股价指数的收益率序列具有时变波动性、厚尾特征、波动性群集等特点,传统的计量分析无法刻画这些特点。通过对即将推出的股指期货的标的指数-沪深300指数的收益率序列进行AR-CH效应分析．采用ARCH模型及其扩展形式对沪深300指数的波动性进行实证分析,结果表明沪深300指数的收益率序列是有偏的,并具有尖峰厚尾的特点。同时也具有波动的群集性和不对称性的特点。     

Stock index futures trading and volatility in international equity markets

This article examines stock market volatility before and after the introduction of equity‐index futures trading in twenty‐five countries, using various models that account for asynchronous data, conditional heteroskedasticity, asymmetric volatility responses, and the joint dynamics of each country's index with the world‐market portfolio. We found that futures trading is related to an increase in conditional volatility in the United States and Japan, but in nearly every other country, we found either no significant effect or a volatility‐dampening effect. This result appears to be robust to model specification and is corroborated by further analysis of the relationship between volatility, trading volume, and open interest in stock futures. An increase in conditional covariance between country‐specific and world returns at the time of futures listing is also documented. © 2000 John Wiley & Sons, Inc. Jrl Fut Mark 20:661–685, 2000     

Stock return predictability of the cumulative abnormal returns around the earnings announcement date: Evidence from China

We find that cumulative abnormal returns adjusted by size, book-to-market, and momentum around the earnings announcement date (DGTW_CAR3 hereafter) significantly and positively predict stock returns in the 6-month period from May 2005 to October 2020 in the China's A-shares market. The monthly equally-weighted DGTW_CAR3 premiums are 0.47% and 0.67% after risk adjustment. Although stock price delay fails to fully account for the DGTW_CAR3 premium, we find that the DGTW_CAR3 premium is more significant for illiquid stocks and during periods with high investor sentiment. This result suggests that market inefficiency explains the DGTW_CAR3 premium. Further analysis shows that, in addition to earnings information, the optimism reflected in the management discussion and analysis section of the annual or half-year report also contributes to the DGTW_CAR3 premium. This finding implies that DGTW_CAR3 may contain new fundamental information that correlates significantly and positively with future stock performance. Finally, we find that the institutional ownership change of a stock associated with DGTW_CAR3 also significantly and positively predicts the stock's return, suggesting that institutional investors adjust their holdings according to DGTW_CAR3 and consequently influence the demand for the stock in the China's A-shares market.     

The stock closing calland futures price behavior: Evidence from the Taiwan futures market

This study examines the behavior of futures prices around stock market close before and after changes to the batching period of the stock closing call. On July 1, 2002, the Taiwan Stock Exchange expanded the length of the batching period roughly 10‐fold, from an average of 30 seconds to 5 minutes. This change presents an opportunity to analyze how a stock closing method affects the behavior of index futures prices. Empirical results indicate that an increase in the length of the batching period affects the return volatility and trading volume of index futures contracts around stock market close. Furthermore, preclose stock returns have a great impact on extended futures returns when the batching period of the stock closing call is long. © 2007 Wiley Periodicals, Inc. Jrl Fut Mark 27:1003–1019, 2007     

ARCH族模型在上证收益率变动中的实证研究

股票价格的频繁波动是股票市场最明显的特征之一。利用ARCH模型及其扩展模型对上证综合指数的波动性进行实证研究,结果发现,我国上海股票市场收益率序列有明显的尖峰厚尾性、波动聚类性、非正态性以及存在条件异方差特性,波动的信息不对称性等特点。     

Option‐Expiration Effects in Small Markets: The Spanish Stock Exchange

This study analyzes the effect of the expiration of the Ibex‐35 Index derivatives, as well as the first four stock options traded in the Spanish Equity Derivatives Exchange, on the return, conditional volatility, and trading volume of the underlying assets. The analysis covers the period from the introduction of the various derivatives to December 1995. This period has been divided into two subperiods in order to determine if there are changes in the conclusions. The expiration of the Ibex‐35 index derivatives is associated with an increase in the trading volume of the underlying asset, but it has no significant effect on either the underlying asset prices or on the level of volatility on the expiration day. However, the expiration of the stock options has significant impact on their underlying assets. We observed a downward pressure on prices and a reduction of volatility level in the week before the expiration date and a significant increase in trading volume on the expiration day. The absence of futures contracts on individual stocks, among other possible causes, may explain these differences. © 2001 John Wiley & Sons, Inc. Jrl Fut Mark 21:905–928, 2001     

The Roles of Gender and Marital Status on Risky Asset Allocation Decisions

We analyze data on asset allocations in individual retirement accounts to examine the roles of marital status and gender on investment decisions. We utilize data from two birth cohorts to understand the relationship over a wide age range. We find that, in their 30s and early 40s, men are more likely to hold a majority of their funds in stocks in individual retirement accounts compared to women. The gender difference disappears around retirement age; however, a significant difference by marital status emerges in that age group. Divorced and widowed individuals are less likely to hold a majority of their funds in stocks compared to married individuals in their 60s. While there exists a positive gap in stock holdings between married men and married women in their 30s, the gender gap is nonexistent among older individuals. Using paired data on stock holdings in the older birth cohort, we show that husbands' and wives' asset allocations in individual retirement accounts are strongly correlated, coinciding with the lack of a gender gap in stock holdings among older couples.     

Replacing executive stock options with share units: A Canadian study

Are share units a better compensation tool than stock options? This paper studies the impact of a transition within the compensation structures of CEOs of companies listed on the TSX Composite Index. Specifically, we ask whether replacing options with units-based compensation reduces the volatility of these companies' stock prices while promoting better returns. Our findings show that a shift to share units reduces large-cap Canadian companies' total risk through its idiosyncratic component. This transition is also accompanied by an increase in their risk-adjusted accounting and market performance. This suggests that share units are better for compensation contracts.     

Asymmetrical reaction to US stock-return news: evidence from major stock markets based on a double-threshold model

This paper examines the hypothesis that both stock returns and volatility are asymmetrical functions of past information from the US market. By employing a double-threshold GARCH model to investigate six major index-return series, we find strong evidence supporting the asymmetrical hypothesis of stock returns. Specifically, negative news from the US market will cause a larger decline in a national stock return than an equal magnitude of good news. This holds true for the volatility series. The variance appears to be more volatile when bad news impacts the market than when good news does.     

Volatility Spillovers and the Risk-Return Relation Between Stock and Foreign Exchange Markets in Brazil

We examine the evidence of mean and volatility spillovers between stock and foreign exchange markets in Brazil with multivariate GARCH models and nonlinear Granger causality tests. We also use a multivariate GARCH-in-mean model to assess the relationship between risk and return in these markets. The results indicate that the stock market leads the foreign exchange market in price formation and that nonlinear Granger causalities from the exchange market to the stock market do occur. Part of these nonlinear causalities are explained by volatility spillovers. We show that exchange rate volatility affects not only stock market volatility but also stock returns.