From T-Bills to Stocks: Seasonal Anomalies Revisited

This paper employed eleven data series which consist of stocks, bonds, bills, equity premiums, term premiums, and various default premiums to investigate whether January seasonality reported in existing literature is robust across different states of the economy as this has important trading implications. For the periods 1926–1990, small stocks, small stock premiums, low grade bonds, and default premiums (spread between high grade, low grade and government bonds) reveal January seasonality and that the seasonality is robust across different states of the economy except for low grade bond returns and default premiums. January seasonality for low grade bond returns and low grade bond default premiums are primarily driven by results found during periods of economic expansion. Overall, January seasonality is more evident during the economic expansion periods although the magnitude of default premiums is larger during periods of economic contraction. Furthermore, prior findings of strong summer equity returns are primarily driven by the results found during the periods of economic contraction. It is also found that equity returns are generally higher during periods of economic expansion.     

现代资产定价理论的研究和发展 ——基于有效市场假说和资产定价模型的视角

围绕对有效市场假说的联合检验假设难题、资本资产定价模型的检验、"贝塔通缉令""因子动物园""多因素模型大战"等重点和核心话题,对现代资产定价理论文献的研究脉络进行梳理和评述,在此基础上对未来资产定价的研究重点和方向提出建议.     

吐鲁番旅游收入本底趋势线的建立——基于近十二年的数据

以吐鲁番旅游总收入数据为代表,借助旅游本底趋势线的研究方法和关于危机评估的理论,从修订数据、模型建立、数据分析、危机评估、结论等方面对吐鲁番旅游收入进行了研究;通过模型的建立,可以发现吐鲁番旅游业呈现指数—正弦线模型状况,根据模型预测出吐鲁番旅游收入的未来趋势出现稳定增长的趋势;进行危机评估可以了解重大事件对吐鲁番旅游收入的影响,得出结论并提出改进策略,促进吐鲁番地区旅游业的发展。     

Robust anomalies? A close look at accrual‐based trading strategy returns

The last 40 years have seen an extensive literature documenting so‐called anomalies in major capital markets. Evidence of ‘abnormal’ returns associated with trading strategies based on readily observable phenomena such as accounting‐based data involves experimental design choices that can be expected to influence the results. We show how evidence of an accrual anomaly in Australia is sensitive to research design specifications such as the choice of proxy for total accruals; the definition of abnormal returns (i.e. the return generating model); the impact of data trimming as a response to exceptionally large returns; and the choice between value and equal weighting of returns. We show that research design choices do matter and help reconcile conflicting prior evidence of any accrual anomaly in Australia. More broadly, our results suggest the need for caution in drawing inferences from trading strategy tests which claim to identify anomalies.     

How about selling commodity futures losers?

This paper explores the benefits of extending the investment universe to commodity futures, from the perspective of momentum traders. We find that the growth-optimal portfolio includes negative (positive) weights on commodity futures losers (stock winners). Motivated by this finding, we construct a joint momentum strategy, buying stock winners and selling commodity futures losers, and show that it generates an average monthly return of up to 1.91% and provides much lower skewness (0.04) and kurtosis (1.27) than a traditional stock momentum strategy. It also greatly improves profitability, especially in unfavorable market states, and thus effectively manages tail risk.     

证券市场异象的行为金融学探讨及对我国的启示

自 2 0世纪 80年代以来证券市场涌现了许多与有效市场理论相悖的市场异象 ,而利用最近兴起的行为金融学则可通过心理学与人类行为学等研究对这些市场异象作出与以往不同的新角度的探讨。且这对于在我国这一并不完全理性市场中的机构投资者有一定的投资策略启示。