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Financial Machine Learning 金融机器学习
Q1 Economics, Econometrics and Finance Pub Date : 2023-01-01 DOI: 10.1561/0500000064
Bryan Kelly, Dacheng Xiu
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引用次数: 0
China's Financial System: Growth and Risk 中国金融体系:增长与风险
Q1 Economics, Econometrics and Finance Pub Date : 2015-12-01 DOI: 10.1561/0500000029
Franklin Allen, Jun Qian, Xian Gu
We provide an updated and comprehensive review of China's financial system and explore the possible challenges in the future. First, China's financial system has been dominated by a large banking sector, which has played an important role in financing the real economy in the past decades. With the interest rate liberalization, the profitability of banks will go down and the competition in the banking sector will become stronger in the future. Moreover, this sector still needs to meet the challenge to reduce the amount of nonperforming loans. Second, the role of the stock market in allocating resources in the economy has been limited and ineffective. However, with the rapid growth of the markets and the introduction of more financial products, financial markets are expected to play a more important role in the economy going forward. Third, a nonstandard sector that consists of alternative financing channels is the most successful part of the financial system in terms of supporting the growth in the past decades. The co-existence of this sector with banks and markets can continue to support the growth of private and local government firms. Finally, in order to sustain the economic growth in China, policies need to reduce the likelihood of damaging financial crises, including a banking sector crisis, a real estate or stock market crash, and a "twin crisis" in the currency market and banking sector.
我们对中国金融体系进行了最新的全面评估,并探讨了未来可能面临的挑战。首先,中国的金融体系一直由庞大的银行业主导,过去几十年,银行业在为实体经济融资方面发挥了重要作用。随着利率市场化,银行的盈利能力将下降,未来银行业的竞争将更加激烈。此外,该部门仍需迎接减少不良贷款数量的挑战。第二,股票市场在经济中配置资源的作用有限且无效。然而,随着市场的快速增长和更多金融产品的推出,金融市场有望在未来的经济中发挥更重要的作用。第三,在过去几十年里,就支持经济增长而言,由替代融资渠道组成的非标准部门是金融体系中最成功的部分。该部门与银行和市场的共存可以继续支持私营和地方政府企业的增长。最后,为了维持中国的经济增长,政策需要减少破坏性金融危机的可能性,包括银行业危机、房地产或股市崩盘,以及货币市场和银行业的“双重危机”。
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引用次数: 16
The Efficient Market Theory and Evidence: Implications for Active Investment Management 有效市场理论与实证:对积极投资管理的启示
Q1 Economics, Econometrics and Finance Pub Date : 2011-06-28 DOI: 10.1561/0500000034
Andrew Ang, W. Goetzmann, S. Schaefer
The Efficient Market Hypothesis (EMH) asserts that, at all times, the price of a security reflects all available information about its fundamental value. The implication of the EMH for investors is that, to the extent that speculative trading is costly, speculation must be a loser's game. Hence, under the EMH, a passive strategy is bound eventually to beat a strategy that uses active management, where active management is characterized as trading that seeks to exploit mispriced assets relative to a risk-adjusted benchmark. The EMH has been refined over the past several decades to reflect the realism of the marketplace, including costly information, transactions costs, financing, agency costs, and other real-world frictions. The most recent expressions of the EMH thus allow a role for arbitrageurs in the market who may profit from their comparative advantages. These advantages may include specialized knowledge, lower trading costs, low management fees or agency costs, and a financing structure that allows the arbitrageur to undertake trades with long verification periods. The actions of these arbitrageurs cause liquid securities markets to be generally fairly efficient with respect to information, despite some notable anomalies.
有效市场假说(EMH)认为,在任何时候,证券的价格都反映了有关其基本价值的所有可用信息。有效市场假说对投资者的含义是,鉴于投机交易成本高昂,投机必然是一种失败者的游戏。因此,在有效市场假说下,被动策略最终必然会击败采用主动管理的策略,主动管理的特点是寻求利用相对于风险调整基准的定价错误的资产进行交易。在过去的几十年里,有效市场假说得到了改进,以反映市场的现实,包括昂贵的信息、交易成本、融资、代理成本和其他现实世界的摩擦。因此,市场有效假说的最新表述允许市场上的套利者发挥作用,他们可以从自己的比较优势中获利。这些优势可能包括专业知识、较低的交易成本、较低的管理费或代理成本,以及允许套利者进行长验证期交易的融资结构。这些套利者的行为导致流动性证券市场在信息方面总体上相当有效,尽管有一些明显的异常情况。
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引用次数: 47
Efficiency in the Japanese Trust Banking Industry: A Stochastic Distance Function Approach 日本信托银行业效率:一种随机距离函数方法
Q1 Economics, Econometrics and Finance Pub Date : 2010-03-14 DOI: 10.2139/ssrn.1570445
Nobuyoshi Yamori, Kozo Harimaya
This paper aims to assess the technical efficiency of Japanese trust banks by using the stochastic distance function approach, which is suitable for analyzing complex trust banks but has never applied for Japanese trust banks. Although the trust banking industry has been one of the most restricted financial sectors in Japan, it has recently been deregulated, particularly in terms of entry restrictions. Most noteworthy was the approval of the entry of the foreign-owned trust banks that represented the financial liberalization at that time. The traditional theory expects that allowing new entry makes market more competitive and therefore players become more efficient to survive. Therefore, it is interesting to investigate whether the liberalization made Japanese banks more efficient. The results indicate that the traditional domestic trust banks possess a technical efficiency superior to new entrants (i.e., foreign-owned trust banks). However, we failed to find an apparent tendency for trust banks to be more efficient now than in the pre-liberalization period.
本文旨在利用随机距离函数方法对日本信托银行的技术效率进行评估,该方法适用于分析复杂的信托银行,但尚未应用于日本信托银行。尽管信托银行业一直是日本最受限制的金融部门之一,但最近已放松管制,特别是在进入限制方面。最值得注意的是代表当时金融自由化的外资信托银行获准进入。传统理论认为,允许新进入使市场竞争更激烈,因此参与者的生存效率更高。因此,研究自由化是否提高了日本银行的效率是一个有趣的问题。结果表明,国内传统信托银行的技术效率优于新进入者(即外资信托银行)。然而,我们没有发现信托银行现在比自由化前更有效率的明显趋势。
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引用次数: 3
Valuation Approaches and Metrics: A Survey of the Theory and Evidence 估价方法与计量:理论与证据综述
Q1 Economics, Econometrics and Finance Pub Date : 2007-04-11 DOI: 10.1561/0500000013
A. Damodaran
Valuation lies at the heart of much of what we do in finance, whether it is the study of market efficiency and questions about corporate governance or the comparison of different investment decision rules in capital budgeting. In this paper, we consider the theory and evidence on valuation approaches. We begin by surveying the literature on discounted cash flow valuation models, ranging from the first mentions of the dividend discount model to value stocks to the use of excess return models in more recent years. In the second part of the paper, we examine relative valuation models and, in particular, the use of multiples and comparables in valuation and evaluate whether relative valuation models yield more or less precise estimates of value than discounted cash flow models. In the final part of the paper, we set the stage for further research in valuation by noting the estimation challenges we face as companies globalize and become exposed to risk in multiple countries.
估值是我们在金融领域许多工作的核心,无论是对市场效率和公司治理问题的研究,还是对资本预算中不同投资决策规则的比较。在本文中,我们考虑了估值方法的理论和证据。我们首先考察了贴现现金流估值模型的文献,从首次提到的股息贴现模型到近年来对股票估值的超额回报模型的使用。在本文的第二部分,我们研究了相对估值模型,特别是在估值中使用倍数和可比性,并评估相对估值模型是否比贴现现金流模型产生更精确的价值估计。在本文的最后一部分,我们通过指出随着公司全球化和在多个国家面临风险,我们所面临的评估挑战,为进一步的估值研究奠定了基础。
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引用次数: 287
Hedge Funds 对冲基金
Q1 Economics, Econometrics and Finance Pub Date : 1900-01-01 DOI: 10.1002/9781119209164.ch7
V. Agarwal, Narayan Naik
Hedge Funds summarizes the academic research on hedge funds and commodity trading advisors. The hedge fund industry has grown tremendously over the recent years. According to some industry estimates, hedge funds have increased from USD 39 million in 1990 to about USD 972 million in 2004 and the total number of hedge funds has gone up from 610 to 7,436 over the same period. At the same time, hedge fund strategies have changed significantly. In 1990 the macro strategy dominated the industry while in 2004 the equity hedge strategy had the largest share of the market. There has also been a shift in the type of investor in hedge funds. In the early 1990s the typical investor was a high net-worth individual investor, today the typical investor is an institutional investor. Thus, the hedge fund market has not only grown tremendously, but the nature of the market has changed. Despite the enormous growth of this industry, there is limited information available on hedge funds. As a result, there is a need for rigorous research from both the investors’ and regulators’ point of view. Investors need research to better understand their investment and their risk exposure. This research also helps investors recognize the extent of diversification benefits hedge funds offer in combination with investments in traditional asset classes, such as stocks and bonds. Regulators can use this research to identify situations where regulation may be needed to protect investors’ interests and to understand the impact hedge funds trading strategies have on the stability of the financial markets. The first part of Hedge Funds summarizes hedge fund performance, including comparisons of risk-return characteristics of hedge funds with those of mutual funds, factors driving hedge fund returns, and persistence in hedge fund performance. The second part reviews research regarding the unique contractual features and characteristics of hedge funds and their influence on the risk-return trade offs. The third part reviews the role of hedge funds in a portfolio including the extent of diversification benefits and limitations of standard mean-variance framework for asset allocation. Finally, the authors summarize the research on the biases in hedge fund databases.
《对冲基金》对对冲基金和商品交易顾问的学术研究进行了总结。对冲基金行业近年来发展迅猛。据一些业内人士估计,对冲基金已从1990年的3900万美元增加到2004年的9.72亿美元左右,同期对冲基金总数从610家增加到7436家。与此同时,对冲基金的策略也发生了重大变化。1990年宏观对冲策略主导了行业,2004年股票对冲策略占据了最大的市场份额。对冲基金投资者的类型也发生了变化。在20世纪90年代早期,典型的投资者是高净值个人投资者,而今天,典型的投资者是机构投资者。因此,对冲基金市场不仅发展迅猛,而且市场的性质也发生了变化。尽管这个行业发展迅猛,但有关对冲基金的信息却十分有限。因此,从投资者和监管机构的角度来看,都有必要进行严格的研究。投资者需要通过研究来更好地了解他们的投资和风险敞口。这项研究还有助于投资者认识到对冲基金与股票和债券等传统资产类别的投资相结合所带来的多样化收益的程度。监管机构可以利用这项研究来确定可能需要监管的情况,以保护投资者的利益,并了解对冲基金交易策略对金融市场稳定的影响。第一部分对对冲基金的业绩进行了总结,包括对冲基金与共同基金的风险收益特征比较、驱动对冲基金收益的因素以及对冲基金业绩的持续性。第二部分回顾了关于对冲基金独特的契约特征和特征及其对风险收益权衡的影响的研究。第三部分回顾了对冲基金在投资组合中的作用,包括分散收益的程度和标准均值-方差资产配置框架的局限性。最后,对对冲基金数据库偏差的研究进行了总结。
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引用次数: 0
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Foundations and Trends in Finance
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