赶超战略与大银行垄断——基于新结构经济学的视角

改革开放初期,中国有很多资本高度密集的大型国有企业,需要大量资金维持生产运营,若无法获得足够的银行贷款以致资金链断裂而破产倒闭,极易引发动荡。本文研究发现,在当时中国资本稀缺的要素禀赋结构下,为确保“重要而不能倒”的国有企业获得足够的银行贷款而不破产倒闭,不适合采用放开银行准入以促使银行竞争的方式,反而应限制银行准入,控制银行数量。原因在于,放开银行准入增加的仅是中小银行,其资金动员能力有限,与国有企业的规模特性不相匹配,更重要的是,大量中小银行进入会分流大银行的存款,降低大银行的资金动员及服务国有企业的能力,导致国有企业的贷款成本和破产风险因此而上升。本文指出,一个国家的银行业结构内生于该国的经济发展战略。限制银行准入的政策安排通过在金融方面支持国有企业,在改革初期起到了维护国防安全、保障国计民生和维持社会经济稳定的作用,为平稳推动改革创造了条件。     

Deprival value and fair value: a reinterpretation and a reconciliation

Measurement is an important current issue for financial accounting standard-setters. Current values are increasingly replacing historical cost measures, but an important unresolved issue is the precise form that current value should take. In this paper two alternative measurement bases that have appeared in accounting standards. Deprivai Value (sometimes called Value to the Business) and Fair Value, are explained and compared. They are then reconciled by making the following three adjustments to their conventional definitions.

(1) In the case of Deprival Value, situations in which net realisable value exceeds replacement cost imply that there is a profitable redevelopment or redeployment opportunity, so that net realisable value is regarded as the appropriate measure of Deprivai Value.

(2) In the case of Fair Value, transactions costs (including installation and removal costs) are added to acquisition values and deducted from disposal values.

(3) In the case of Fair Value, it is assumed that net realisable value represents the ‘highest and best use’, except when it is exceeded by both replacement cost and value in use. In the latter case, ‘highest and best use’ (and therefore Fair Value) is inferred by assuming profit-maximising behaviour by the owner.

It is suggested that the resulting synthesis represents a method of current valuation which is consistent with the objective of measuring the asset in terms of the economic opportunities that are available to its current owner in the condition and location in which it is currently to be found.     

Learning, Cascades, and Transaction Costs

The paper analyzes the effect of transaction costs on sociallearning in an asset market with asymmetric information, sequentialtrading, and a competitive price mechanism. Both fixed and proportionaltransaction costs reduce the information content of tradingorders and lead to informational cascades. If transaction costsare very high, an informational cascade may occur not only whenbeliefs converge on a specific asset value but also when thereis extreme uncertainty about the asset's fundamental value.Finally, if the value in the bad state is sufficiently low,proportional transaction costs lead to an informational cascadeonly when prices are very high.     

Implications of Transaction Costs for the Post–Earnings Announcement Drift

This paper examines the effect of transaction costs on the post–earnings announcement drift (PEAD). Using standard market microstructure features we show that transaction costs constrain the informed trades that are necessary to incorporate earnings information into price. This implies weaker return responses at the time of the earnings announcement and higher subsequent returns drift for firms with higher transaction costs. Consistent with this prediction, we find that earnings response coefficients are lower for firms with higher transaction costs. Using portfolio analyses, we find that the profits of implementing the PEAD trading strategy are significantly reduced by transaction costs. In addition, we show, using a combination of portfolio and regression analyses, that firms with higher transaction costs are the ones that provide the higher abnormal returns for the PEAD strategy. Our results indicate that transaction costs can provide an explanation not only for the persistence but also for the existence of PEAD.     

Equilibrium returns with transaction costs

We study how trading costs are reflected in equilibrium returns. To this end, we develop a tractable continuous-time risk-sharing model, where heterogeneous mean–variance investors trade subject to a quadratic transaction cost. The corresponding equilibrium is characterized as the unique solution of a system of coupled but linear forward–backward stochastic differential equations. Explicit solutions are obtained in a number of concrete settings. The sluggishness of the frictional portfolios makes the corresponding equilibrium returns mean-reverting. Compared to the frictionless case, expected returns are higher if the more risk-averse agents are net sellers or if the asset supply expands over time.     

The R&D-abnormal return anomaly: a transaction cost explanation

Previous research finds a positive and significant relation between current increases in R&D expenditures and future abnormal stock returns. While the existence of this anomalous pattern is well-established, its underlying causes are the subject of much debate. Recent research also shows that transaction costs can lead to apparent market anomalies such as the post-earnings-announcement drift. We combine these two lines of research and posit that the positive relation between R&D increases and future abnormal stock returns is due to transaction costs. Consistent with this hypothesis, we find that abnormal returns on R&D-based, zero-net-investment portfolios disappear after incorporating standard measures of transaction costs. Overall, our results show that the R&D-abnormal return anomaly is more likely due to transaction costs than to the alternative hypotheses of market inefficiency or omitted risk factors.     

EX‐DIVIDEND DAY PRICE BEHAVIOR OF EXCHANGE‐TRADED FUNDS

We document that for exchange‐traded funds (ETFs), the price falls on average by the dividend amounts on the ex‐dividend day, and there are significantly positive abnormal volumes. This is because trading in ETFs entails lower transaction costs and lower risk than trading in equity closed‐end funds (CEFs) and individual stocks. Similar results are also found for equity CEFs. However, regression analyses indicate that transaction costs and risk are indeed negligible for ETFs but not for equity CEFs and that risk remains important for a sample of stocks matched based on transaction costs. Overall, the results support the short‐term traders hypothesis.     

Market or limit orders?

In this paper we investigate the problem of optimal order placement of an asset listed on an exchange using both market and limit orders in a simple model of market dynamics. We seek to understand under which settings it is optimal to place limit or market orders. Limit orders typically lower transaction costs but increase the risk of incomplete order execution, whereas market orders typically have higher transaction costs but are guaranteed to be executed. Rather than considering order book dynamics to determine if a limit order is executed we rely on price dynamics for this. We look at implementation shortfall in this setup with market impact of trading and propose a dynamic program to find the optimal placement of both market and limit orders for risk-neutral and risk-averse traders. With this we find a bound on the expected cost of trading and show that a trader who behaves optimally should always expect to pay less to trade less. We then solve the dynamic program numerically and examine optimal order placement strategies. We find that the decision between market and limit orders is sensitive to price volatility, risk aversion, and trading costs.     

Arbitrage and Viability in Insurance Markets

Insurance markets are subject to transaction costs and constraints on portfolio holdings. Therefore, unlike the frictionless asset markets case, viability is not equivalent to absence of arbitrage possibilities. We use the concept of unbounded arbitrage to characterize viable prices on a complete and an incomplete insurance market. In the complete market, there is an insurance contract for every possible event. In the incomplete market, risk can be insured through proportional and excess of loss like insurance contracts. We show how the the structure of viable prices is affected by the portfolio constraints, the transaction costs, and the structure of marketed contracts.     

A new estimate of transaction costs

Transaction costs are important for a host of empirical analysesfrom market efficiency to international market research. Buttransaction costs estimates are not always available, or whereavailable, are cumbersome to use and expensive to purchase.We present a model that requires only the time series of dailysecurity returns to endogenously estimate the effective transactioncosts for any firm, exchange, or time period. The feature ofthe data that allows for the estimation of transaction costsis the incidence of zero returns. Incorporating zero returnsin the return-generating process, the model provides continuousestimates of average round-trip transaction costs from 1963to 1990 that are 1.2% and 10.3% for large and small decile firms,respectively. These estimates are highly correlated (85%), withthe most commonly used transaction cost estimators.     

交易费用、政府边界与财政体制改革

将新制度经济学中的交易费用理论引入政府供给公共产品的分析，给出了政府供给公共产品的边界的理论模型。我国政府在供给公共产品过程中发生的交易费用：决策费用、实施费用和监督费用过高，制约了我国政府供给公共产品的效率。制度的一项重要功能是降低交易成本，改革财政分权体制是降低政府供给公共产品发生的交易费用的有效途径。     

Risk Sharing in a World with Processing Costs: Trading versus Banking

We analyze the bank versus exchange problem in a Diamond Dybvig (1983) economy with exogenous transaction processing costs. We find that processing costs in the market enables the bank to overcome the side trade threat ( Jacklin (1987) ) and offer some desirable liquidity insurance. Moreover, in the bank equilibrium processing costs are proportional to consumption, while in the market economy early and late consumers incur equal costs. These two effects explain that for a given level of aggregate processing costs, the bank economy is superior. On the other hand, the number of transactions in the bank economy is larger. It is for this reason that if processing costs are proportional to transaction value, and independent of the mechanism used, the exchange economy is superior.     

Efficiency Tests of the Foreign Currency Options Market

Based on a new options transactions data base from the Philadelphia Stock Exchange Foreign Currency Options Market, this paper examines the importance of the effect of nonsynchronous prices and transaction costs on the usual option market efficiency tests. The tests conducted are based on the transaction cost adjusted early exercise and put-call parity pricing boundaries applicable to the American foreign currency options market. The test results show that the put-call parity boundary tests are sensitive to both nonsynchronous prices and transaction costs. The early exercise boundary tests are sensitive to transaction costs but are not very sensitive to simultaneity of the option price and the underlying spot price. Under the no-transaction costs scenario, a large number of early exercise boundary violations is found even when simultaneous spot and option prices are used. These violations disappear when actual transaction costs are taken into account.     

A note on transaction costs and the interpretation of dividend drop‐off ratios

In a recent edition of this Journal, Bartholdy and Brown (1999) presented an analysis of the ex‐dividend share price behaviour of shares listed on the New Zealand Stock Exchange. The authors conclude that their results are consistent with the tax clientele effect (driven by long‐term investors) and that there is little or no support for the short‐term trading hypothesis. Our purpose is to highlight the importance of transaction costs in analyses such as Bartholdy and Brown's. We argue that their results have an alternative interpretation because their analysis excludes the impact of transaction costs. We extend their model to include transaction costs and show that their results are not necessarily inconsistent with the short‐term trading hypothesis. A critical point of our analysis is that, in the presence of transaction costs, the equilibrium drop‐off ratio for dividend strip traders will be less than one, and, in some cases, can be less than the equilibrium drop‐off ratio for long‐term investors.     

Efficient discretization of stochastic integrals

Sharp asymptotic lower bounds on the expected quadratic variation of the discretization error in stochastic integration are given when the integrator admits a predictable quadratic variation and the integrand is a continuous semimartingale with nondegenerate local martingale part. The theory relies on inequalities for the kurtosis and skewness of a general random variable which are themselves seemingly new. Asymptotically efficient schemes which attain the lower bounds are constructed explicitly. The result is directly applicable to a practical hedging problem in mathematical finance; for hedging a payoff which is replicated by a continuous-time trading strategy, it gives an asymptotically optimal way to choose discrete rebalancing dates and portfolios with respect to transaction costs. The asymptotically efficient strategies in fact reflect the structure of the transaction costs. In particular, a specific biased rebalancing scheme is shown to be superior to unbiased schemes if the transaction costs follow a convex model. The problem is discussed also in terms of exponential utility maximization.     

Corporate Bond Market Transaction Costs and Transparency

Using a complete record of U.S. over‐the‐counter (OTC) secondary trades in corporate bonds, we estimate average transaction costs as a function of trade size for each bond that traded more than nine times between January 2003 and January 2005. We find that transaction costs decrease significantly with trade size. Highly rated bonds, recently issued bonds, and bonds close to maturity have lower transaction costs than do other bonds. Costs are lower for bonds with transparent trade prices, and they drop when the TRACE system starts to publicly disseminate their prices. The results suggest that public traders benefit significantly from price transparency.     

On short-term institutional trading skill,behavioral biases,and liquidity need

Are portfolio managers skilled or do they trade too much? Using a marked-to-market based “fair-value” method for measuring fund manager skill, we find that institutional managers can potentially earn +42 (+33) basis points benchmark-adjusted return before transaction costs after a holding period of four weeks on their buy (sell) trades. After transaction costs, the benchmark-adjusted return for the buy (sell) trades is +1 (-8) basis points. Pension fund managers outperform money managers. We are unable to detect evidence for overconfidence among pension fund managers over this short-horizon. In addition, we are unable to find evidence of disposition effect among mutual fund managers. Institutions tend to engage in short-term trades with holding period of four weeks (or less) despite only breaking-even or making economically insignificant (modest) benchmark-adjusted losses after round-trip transaction costs for liquidity, risk-management, or tax-minimization reasons. Among these, evidence for liquidity trading motive is the strongest.     

模糊厌恶下股指期货风险对冲策略设计及实证分析

投资者对股指期货与现货有着不同的模糊厌恶,本文首先将此假设条件引入带交易成本的Garleanu and Pederson (2013)投资模型中,并以指数基金对冲策略为例,构建了一个股指期货动态对冲的理论模型。与非对冲策略相比,基于上述模型设计的对冲策略投资绩效更好,动态最优成交额占目标交易额的比例更小,目标成交额对收益率预测因子的敏感性更大。借助上述模型,本文选取2010年4月至2021年6月的中国ETF指数基金和股指期货数据,并以2015年9月股指期货管理措施实施为界进行区间划分,实证研究发现:(1)中国A股市场的ETF投资组合进行股指期货对冲显著提升了投资绩效,但股指期货管理会削弱该作用;(2)投资绩效改善主要来源于交易成本的下降与目标成交额因子敏感性的提升,该机制受到股指期货管理的约束;(3)与Garleanu and Pederson (2013)、Zhang et al. (2017)相比,本文对冲策略保留“抗跌”特点的同时增加了“易涨”特性。本文研究结果表明,在当前大力发展机构投资者的背景下应不断丰富股指期货、股指期权产品谱系,降低股指期货交易成本并完善持仓约束。     

International equity portfolio allocations and transaction costs

In spite of the critical role of transaction cost, there are not many papers that explicitly examine its influence on international equity portfolio allocation decisions. Using bilateral cross-country equity portfolio investment data and three direct measures of transaction costs for 36 countries, we provide evidence that markets where transaction costs are lower attract greater equity portfolio investments. The results imply that future research on international equity portfolio diversification cannot afford to ignore the role of transaction costs, and policy makers, especially in emerging markets, will have to reduce transaction costs to attract higher levels of foreign equity portfolio investments.