对中国股票市场费雪效应及相关“波动性假说”的检验

本文利用我国1991年1月到2007年12月的月度数据对我国股票市场实际通货膨胀与股票收益的关系进行了实证分析,结果发现:与费雪效应相反,我国通货膨胀率与股票收益呈负相关关系,而且在对解释这种负相关关系的波动性假说(the Variability Hypothesis)的检验中,发现该假说能够解释我国股市股票收益与通货膨胀之间所呈现的这种负相关关系。     

Financial factors and firm growth: evidence from financial data on Taiwanese firms

We investigate the possible predictability of firm growth in Taiwan using cross-sectional data of financial factors for the years 1997 and 2003 via principal component analysis. Our results reveal that the 18 financial variables (sales growth rate, total assets, total sales, return on assets, return on equity, gross margin, operating cost minus depreciation divided by sales plus other trading income, acid test ratio, debt–equity ratio, time interest earned, average receivables per average daily sales, inventory, average payables per average daily sales, working capital, working capital as a fraction of total assets, long-term liabilities as a fraction of total assets, and sales as a fraction of net worth of the firm) that we employ bunch together into five different financial ratios for the years 1997 and 2003 that are stable between these years. These financial factors are short-term liquidity, return on investment, long-term liquidity, firm size and capital turnover. Regressing these ratio groups (extracted principal components) on firm growth, we find return on investment in the year 1997 was positively and significantly related to firm growth, while long-term solvency was negatively related to firm growth. In addition, smaller firms tended to grow faster. By 2003, larger firms grew faster than smaller ones and short-term liquidity was positively and significantly related to firm growth, while return on investment was no longer a significant determining factor. Our findings suggest that firms that finance internally or do not rely too heavily on indebtedness may end up growing slower during boom periods but they are the ones that survive and outperform after the bust.     

Variance swap dynamics

We compare several parametric and non-parametric approaches for modelling variance swap curves by conducting an in-sample and an out-of-sample analysis using market prices. The forecasted Heston model gives the best overall performance. Moreover, the static Heston model highlights some problems of stochastic volatility models in option pricing of forward starting products.     

Do foreign exchange fund managers behave like heterogeneous agents?

This paper estimates an Heterogeneous Agent Model (HAM) on currency trader indices to explain the large shifts in profitability in currency styles surrounding the global financial crisis. In the model, fund managers allocate capital conditional on recent performance to a value strategy, a momentum strategy, and a carry strategy. Subsequent estimation results reveal that (1) a large part of the behavior of currency managers can indeed be described by these three simple strategies, and (2) currency managers shift capital from recent winning styles to recent losing styles, and hence apply a negative feedback strategy. We finally show that a negative feedback strategy is indeed optimal, but currency managers could improve performance by applying it less aggressively if they were able to.     

基于价值投资的证券市场相关研究和回归分析以及应对策略

为了能够提高我国证券市场价值投资的应用水平,对我国证券市场价值投资进行实证研究,结果表明,我国证券市场仍是一种新兴的证券市场,处于由非有效市场向弱有效市场的转型中。随着上市公司质量的不断提升,价值投资策略将成为证券市场的主流形式。     

金融类上市公司股票定价方法研究

本文对当前的金融类上市公司几种估值模型进行了改进,通过多元统计回归的方法建立了金融类上市公司的价值评估模型,并进行了实证分析。实证结果表明,该评估模型的预测精度达到93.80%,大大提高了传统评估模型的预测精度。     

Testing for multivariate volatility functions using minimum volume sets and inverse regression

We propose two new types of nonparametric tests for investigating multivariate regression functions. The tests are based on cumulative sums coupled with either minimum volume sets or inverse regression ideas; involving no multivariate nonparametric regression estimation. The methods proposed facilitate the investigation for different features such as if a multivariate regression function is (i) constant, (ii) of a bathtub shape, and (iii) in a given parametric form. The inference based on those tests may be further enhanced through associated diagnostic plots. Although the potential use of those ideas is much wider, we focus on the inference for multivariate volatility functions in this paper, i.e. we test for (i) heteroscedasticity, (ii) the so-called ‘smiling effect’, and (iii) some parametric volatility models. The asymptotic behavior of the proposed tests is investigated, and practical feasibility is shown via simulation studies. We further illustrate our methods with real financial data.     

Adaptive model-based seasonal adjustment of time series: An Empirical Comparison with XII-ARIMA and SIGEX

Several model-based approaches have been proposed in recent years for adjusting and decomposing time series data. Using real world data, this paper presents results of a large scale empirical comparison of the XII-ARIMA and SIGEX procedures to DESAEP, a new adaptive model-based method that combines stochastic and deterministic effects. The comparison reveals no substantial inconsistencies in seasonally adjusted values produced by the 3 methods. As for the magnitude in revisions in both concurrent and forecasted seasonally adjusted values, an overall reduction by a factor of 2 to 3 was obtained with DESAEP depending on the level of variability in the data.     

经济一体化与香港股市的国际联动实证研究

本文从汇率制度、利率水平、国际贸易、投资群体等方面,分析香港股票市场所处的宏观管理运行环境,考察香港和美国的密切经济关系,研究全球一体化不断加深的情形下香港、日本和美国股市的动态关系。研究结果表明,三大市场的动态关系依然存在;但恒指跟上证指并不存在协整关系。     

贸易与收入分配关系的理论和实证研究回顾

20世纪90年代末,随着全球化的急剧推进,各国非熟练劳动力的收入日益恶化且收入差距也迅速扩大,使得贸易对收入分配的影响成为各国学者研究的热点。无论是传统的国际贸易理论,还是当代的新国际贸易理论对贸易是否会影响国内收入分配这一问题上一直充满争议。本文对贸易与收入分配关系的理论和实证研究进行简单的回顾和归纳,并在分析现有研究成果的基础上指出今后这一问题的研究动向。