共查询到20条相似文献,搜索用时 15 毫秒
2.
This paper provides evidence that top managers have contrarian views on firm value. Managers' perceptions of fundamental value diverge systematically from market valuations, and perceived mispricing seems an important determinant of managers' decision making. Insider trading patterns shows that low valuation firms are regarded as undervalued by their own managers relative to high valuation firms. This finding is robust to controlling for noninformation motivated trading. Further evidence links managers' private portfolio decisions to changes in corporate capital structures, suggesting that managers try to actively time the market both in their private trades and in firm‐level decisions. 相似文献
3.
This paper uses population‐wide data from the Panel Study of Income Dynamics and the Survey of Consumer Finances to resolve the conflict between overtrading and inactivity shown in administrative data on brokerage and retirement accounts, respectively. Considerable inertia is found and linked to characteristics (e.g., limited education or resources), but less to index movements: the downswing has encouraged staying out, rather than getting out, of the market. The small minority with brokerage accounts exhibits important differences in trading patterns relative to the population and invests small fractions of wealth in brokerage accounts. Results strengthen the case for default options in retirement accounts and built‐in trading provisions in mutual funds. 相似文献
4.
与国外学对美国股票市场的研究结果不同,中国股票市场并不存在动量效应:相反,中国股市却存在一种“轮涨效应”或“补涨效应”,即平均而言,前一段时期内涨幅较小的股票在以后一段时期的表现会比前一段时期内涨幅较高的股票表现更为良好。这个结果同中国证券市场长期以来存在的个股轮番炒作现象是相吻合的。 相似文献
8.
This paper theoretically evaluates the robustness of the Security Market Line relationship when the market proxy employed is not mean-variance efficient. The analysis focuses on the behavior of the “benchmark errors,” the deviations of assets and portfolios from the Security Market Line. First, we characterize how the location of an asset in mean-variance space determines its benchmark error. Then the continuity properties of the benchmark errors are studied. The results indicate that the magnitudes of the errors exhibit continuous but not uniformly continuous behaviors. The relative rankings based on deviations from the Security Market Line, however, exhibit some severe discontinuities. In fact, these can be exactly reversed for two proxies arbitrarily close in mean-variance space. 相似文献
9.
This paper examines three important issues related to the relationship between stock returns and volatility. First, are Duffee's (1995) findings of the relationship between individual stock returns and volatility valid at the portfolio level? Second, is there a seasonality of the market return volatility? Lastly, do size portfolio returns react symmetrically to the market volatility during business cycles? We find that the market volatility exhibits strong autocorrelation and small size portfolio returns exhibit seasonality. However, this phenomenon is not present in large size portfolios. For the entire sample period of 1962–1995, the highest average monthly volatility occurred in October, followed by November, and then January. Examining the two sub-sample periods, we find that the average market volatility increases by 15.4% in the second sample period of 1980–1995 compared to the first sample period of 1962–1979. During the contraction period, the average market volatility is 60.9% higher than that during the expansion period. Using a binary regression model, we find that size portfolio returns react asymmetrically with the market volatility during business cycles. This paper documents a strongly negative contemporaneous relationship between the size portfolio returns and the market volatility that is consistent with the previous findings at the aggregate level, but is inconsistent with the findings at the individual firm level. In contrast with the previous findings, however, we find an ambiguous relationship between the percentage change in the market volatility and the contemporaneous stock portfolio returns. This ambiguity is attributed to strongly negative contemporaneous and one-month ahead relationships between the market volatility and portfolio returns. 相似文献
10.
运用动态最优控制理论与随机金融分析方法,研究由劳动收入的特质风险与借贷约束导致的非完全市场对消费者最优投资和消费策略、波动及福利损失的影响,得到相应的动态最优投资和消费策略.研究发现:非完全市场会显著抑制消费者的消费动机和投资动机,并加剧消费波动和投资波动.此外,财务困境下非完全市场会对消费者造成高达40% 的福利损失. 相似文献
11.
This paper develops two models of the money market mutual fund maturity decision. The first assumes that markets are efficient but that transactions are costly. The second model relies on a survey of fund managers to select variables that might permit exploiting perceived profit opportunities. Empirical tests provide strong support for the former model, but none for the latter. This can be interpreted as meaning that although managers may believe that financial markets are inefficient, margins are too small and competition too fierce for them to react aggressively on those beliefs. Any actions they do take to exploit alleged inefficiencies are not detectable in the data. In addition, the study finds that managers in the aggregate have no special ability to adjust their funds' maturity to capitalize on interest-rate changes. 相似文献
12.
The assumption that the market portfolio follows a specified diffusion process implies, in a simple equilibrium framework, that the representative individual must have a certain utility function which is identified in the paper. Not every diffusion process is viable, i.e., can be “endogenized” to be the market portfolio's price process in such an equilibrium model. The paper provides necessary and sufficient conditions for viability which imply that viable diffusion processes constitute a rather restricted family. 相似文献
13.
The Journal of Real Estate Finance and Economics - The U.S. housing market is heterogeneous in that house price dynamics vary greatly across regions. Depending on the location of the main... 相似文献
14.
Using error‐free data on life‐cycle portfolio allocations of a large sample of Norwegian households, we document a double adjustment as households age: a rebalancing of the portfolio composition away from stocks as they approach retirement and stock market exit after retirement. When structurally estimating an extended life‐cycle model, the parameter combination that best fits the data is one with a relatively large risk aversion, a small per‐period participation cost, and a yearly probability of a large stock market loss in line with the frequency of stock market crashes in Norway. 相似文献
15.
中国古典舞蕴涵了丰富而深厚的历史意义,无论是在舞蹈形态上还是在意象意境的塑造上都是极其令人深思的。本文试从中华和谐美第一图———太极图,对中国古典舞的美学意蕴进行探源与理性思考。 相似文献
16.
The Markowitz portfolio optimization model, popularly known as the Mean-Variance model, assumes that stockreturns follow normal distribution. But when stock returns do not follow normal distribution, this model wouldbe inadequate as it would prescribe sub-optimal portfolios. Stock market literature often deliberates that stock returns are non-normal. In such context the Markowitz model would not be sufficient to estimate the portfolio risks. The purpose of this paper is to expand the original Markowitz portfolio theory (mean-variance) via adding the higher order moments like skewness (third moment about the mean) and kurtosis (fourth moment about the mean) in the return characteristics. The research paper investigates the impact of including higher moments using multi-objective programming model for portfolio stock selection and optimization. The empirical results indicate that the inclusion of higher moments had a considerable impact in estimating the returns behavior of portfolios. The portfolios optimized using all the four moments, generated higher returns for the given level of risk in comparison to the returns of the Markowitz model during the study period 2000–2011. The results of this study would be immensely useful to fund managers, portfolio managers and investors as it would help them in understanding the Indian stock market behavior better and also in selecting alternative portfolio selection models. 相似文献
17.
This paper uses a factor model to test whether the market portfolio is a dynamic factor in the sense that individual stock returns contain a premium linked to the conditional risk of the market portfolio. The market conditional risk is based on a decomposition of the market variance into a time-varying trend component and a transitory component. The evidence shows that the conditional market premium is rising when the permanent trend rises relative to the conditional variance. The evidence for individual stock returns supports the notion that the market portfolio is a dynamic factor. Individual stock return autocorrelations are fully explained by the time variation in the market premium. The risk premia attributed to static factors are statistically insignificant. 相似文献
18.
当前,全球经济依然是迷雾笼罩,这种前景的不明朗对国际市场带来的多是非正面影响。安永公司最新发布的一份调查报告显示,在过去的一年里,全球采矿与金属行业并购市场受经济不确定影响出现了较大波动,价格疲软,大规模的资本支出急剧缩减,并购活动倾向于低风险、小规模,很多公司开始进行非核心资产剥离活动。而中国又毫无悬念地持续了近年来在国际并购市场的一贯突出表现——2012年占该行业全球交易总额的五分之一强,又成为实施并购活动 相似文献
19.
城市化是刘易斯二元经济发展理论的基本政策含义。否定刘易斯模型的托达罗模型导致了农业发展低水平均衡、经济增长低效率和经济结构低级化等消极后果。走出托达罗困境的可行选择 ,是经过修正和补充的刘易斯模型的复归。伴随着发展中国家经济发展战略重点的转换 ,经济发展理论走出了一条螺旋式上升的成长道路 相似文献
20.
This paper presents an analysis of the testability of the mean variance efficiency of a market index when the returns on some components of the index itself are not perfectly observable. The results are basically not supportive of the notion that mean variance efficiency is testable on a subset of the assets. Bounding the market share of the missing asset and its expected return is not sufficient to produce a valid test. When the variance of the missing asset is bounded, and the amount of wealth that might be missing is small, it is possible, in principle, to reject correctly the mean variance efficiency of a market index. 相似文献
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