Consumption and Portfolio Policies With Incomplete Markets and Short-Sale Constraints: the Finite-Dimensional Case1

We use a martingale approach to study optimal intertemporal consumption and portfolio policies in a general discrete-time, discrete-state-space securities market with dynamically incomplete markets and short-sale constraints. We characterize the set of feasible consumption bundles as the budget-feasible set defined by constraints formed using the extreme points of the closure of the set of Arrow-Debreu state prices consistent with no arbitrage, and then establish a relationship between the original problem and a dual minimization problem.     

CONSUMPTION AND PORTFOLIO POLICIES WITH INCOMPLETE MARKETS AND SHORT-SALE CONSTRAINTS IN THE FINITE-DIMENSIONAL CASE: SOME REMARKS

This paper extends He and Pearson's (1991) martingale approach to the study of optimal intertemporal consumption and portfolio policies with incomplete markets and short-sale constraints to a framework in which no assumptions are made on the price process for the securities. We show how both their characterization of the budget-feasible set and duality result can be extended to account for an unbounded set II of Arrow-Debreu state prices compatible with the arbitrage-free assumption. We also supply a (fairly general) sufficient condition for II to be bounded, as required in their setting.     

EQUILIBRIUM STATE PRICES IN A STOCHASTIC VOLATILITY MODEL1

In a stochastic volatility model, the no-free-lunch assumption does not induce a unique arbitrage price because of market incompleteness. In this paper, we consider a contingent claim on the primitive asset, traded in zero net supply. Given a system of Arrow-Debreu state prices, we provide necessary and sufficient conditions for consistency with an intertemporal additive equilibrium model that we fully characterize. We show that the risk premia corresponding to the minimal martingale of Föllmer and Schweizer (1991) are consistent with logarithmic preferences, while the Hull and White model (1987) (volatility risk premium independent of the asset price) is consistent with a class of utility functions including constant relative risk aversion (CRRA) ones.     

Coefficient of determination in a simultaneous equation model: A pedagogic note

The simultaneity of the market for securities has been recognized by a number of finance authors. Simkowitz and Jones [10] advocate the use of a simultaneous equation system to capture some of the relationships among the securities in a homogeneous set. Simkowitz and Logue [11], and Jones and Simkowitz [6], have performed studies using a simultaneous equation system in a capital asset pricing framework. Marcis and Smith [9] call for the use of the simultaneous methodology when there is a strong residual correlation between securities. Simultaneous equation systems have been used in other areas of finance by authors such as Barnea [1], Herbst [5], and Logue and Lindvall [8]. This note explores how anomalies concerning the coefficient of determination (R²) mentioned in previous research could have occured. Conditions under which the (R²) does not have its usual properties and an example is given.     

Viability and Equilibrium in Securities Markets with Frictions

In this paper we study some foundational issues in the theory of asset pricing with market frictions. We model market frictions by letting the set of marketed contingent claims (the opportunity set) be a convex set, and the pricing rule at which these claims are available be convex. This is the reduced form of multiperiod securities price models incorporating a large class of market frictions. It is said to be viable as a model of economic equilibrium if there exist price-taking maximizing agents who are happy with their initial endowment, given the opportunity set, and hence for whom supply equals demand. This is equivalent to the existence of a positive lineaar pricing rule on the entirespace of contingent claims—an underlying frictionless linear pricing rule—that lies below the convex pricing rule on the set of marketed claims. This is also equivalent to the absence of asymptotic free lunches—a generalization of opportunities of arbitrage. When a market for a nonmarketed contingent claim opens, a bid-ask price pair for this claim is said to be consistent if it is a bid-ask price pair in at least a viable economy with this extended opportunity set. If the set of marketed contingent claims is a convex cone and the pricing rule is convex and sublinear, we show that the set of consistent prices of a claim is a closed interval and is equal (up to its boundary) to the set of its prices for all the underlying frictionless pricing rules. We also show that there exists a unique extended consistent sublinear pricing rule—the supremum of the underlying frictionless linear pricing rules—for which the original equilibrium does not collapse when a new market opens, regardless of preferences and endowments. If the opportunity set is the reduced form of a multiperiod securities market model, we study the closedness of the interval of prices of a contingent claim for the underlying frictionless pricing rules.     

OPTIONS AND EFFICIENCY IN MULTIDATE SECURITY MARKETS

This paper extends the work of Ross (1976; Q. J. Econ. (90)1, 75–89) to multidate security markets. First, we show that if a primitive security separates states at the terminal date, then there exist multiperiod European options on that security generating dynamically complete markets. Second, we show that if a primitive security conditionally separates states at the terminal date, then there exist multiperiod European options on that security generating generically dynamically complete markets provided that certain conditions hold. Third, we show that there are economies for which the minimum number of multiperiod European options on a primitive security generating generically dynamically complete markets is relatively large. Finally, we show that in these economies, a relatively small number of multiperiod European options on possibly different portfolio strategies of primitive securities generates generically dynamically complete markets.     

Commission deregulation and performance of securities firms: Further evidence from Japan

This study explores the impacts on small securities firms’ performance of the multi-stage commission deregulation in Japan from 1994 to 1999. Different from previous findings, market volume does not rise while commission rates fall following each phase of the deregulation. Therefore, securities firms’ stock performance tends to decline as the deregulation proceeds, contrasting with the stock price increase reported previously. Moreover, the negative price effect tends to vary with firm size and deregulation phase, consistent with the fact that securities firms of different sizes depend to different extent on commission income from transactions covered by different phases of the deregulation.     

Ethical Issues Related to the Mass Marketing of Securities

This paper examines ethical issues involved in the mass marketing of securities to individuals. The marketing of products deemed “socially questionable” or “sinful” (like tobacco and alcohol) has long been recognized as posing special ethical challenges (Kotler, P. and S. Levy: 1971, Harvard Business Review 49, 74–80; Davidson, D. K: 1996, Selling Sin: The Marketing of Socially Unacceptable Products (Quorum Press, Westport). We contend that marketers should consider securities (i.e. common stock, options) in a similar vein, as a potentially dangerous product. Given the inherent volatility of equity prices, responsible marketers need to exercise caution and restraint in promoting securities. We evaluate whether the NYSE’s current guidelines adequately encourage ethical marketing practices and deter unethical ones. Using recent examples of controversial brokerage advertisements, we expose weaknesses in the Exchange’s vague injunction that members not “mislead” reasonable people by making “exaggerated claims” in their communications. From a moral perspective, we find it troublesome that intentionality need not be present for a promotion to be considered misleading. Also problematic is the continued invocation of the reasonable person standard to judge the propriety of advertisements. We close with some thoughts on improving the quality of securities marketing. We suggest that the NYSE, in the interests of fostering higher ethical behavior among member marketers, may need to revive a marketing code of conduct prevalent on Wall Street in an earlier era.     

A Characterization of Complete Security Markets On A Brownian Filtration1

This paper provides a characterization theorem for a complete securities market when security prices follow Itô processes on a multidimensional Brownian filtration. This characterization theorem is a special case of Harrison and Pliska (1983), and it clarifies a counterexample provided by Müller (1989).     

The risk effects of combining banking, securities, and insurance activities

We create synthetic universal banks to examine the impact of securities and insurance activities on the banking firms’ risk. We find that these nonbank activities reduce the overall risk to the firm but increase systematic market risk—thus reducing the firm’s ability to diversify. Moreover, the unit price of risk does not appear to contain a risk premium to price the enhanced systemic risk exposure that might be engendered by greater convergence across financial firms. Our finding suggests that if there are net gains to universal banking, potential gains from synergies and demand effects must be powerful enough to overcome the disadvantages of increased systemic risk exposure. The results suggest that diversification benefits, when considered in isolation from the other implications of expanded bank powers, are not sufficiently large to justify expanding bank powers into nonbank securities and insurance underwriting activities.     

Firm value and its relation to equity retention levels, forecast earnings disclosures and underpricing in initial public offerings in Hong Kong

This study helps extend our understanding of the factors underlying the valuation of initial public offering (IPO) firms within the Hong Kong market context. The issues investigated are all the more important given Hong Kong's unique position in China, where free and unfettered capital markets entice global institutions wishing to partake in the ‘China investment story’. We find support for three signals of initial firm value: the fraction of equity retained by pre-listing stakeholders [Leland, H., & Pyle, D. (1977). Information asymmetries, financial structure and financial intermediation. Journal of Finance, 32, 371–387], the voluntary disclosure of a prospectus earnings forecast [Trueman, B. (1986). Why do managers voluntarily release earnings forecasts. Journal of Accounting and Economics, 53–71] and the amount of funds ‘given-up’ through IPO underpricing [see Allen, F., & Faulhaber, G. R. (1989). Signalling by underpricing in the IPO market. Journal of Financial Economics, 23, 303–323; Grinblatt, M., & Hwang, C. Y. (1989). Signalling and the pricing of new issues. Journal of Finance, 44, 393–420; Welch, I. (1989). Seasoned offerings, imitation costs, and the underpricing of initial public offerings. Journal of Finance, 44, 421–449]. Moreover, the signals appear robust to different firm valuation measures (i.e., market-to-book and Tobin's Q) and to the inclusion/exclusion of PRC state-owned H-share issuers.A number of other important contributions also emerge. First, we develop a new measurement form for the pre-listing shareholders’ equity retention level (α) by decomposing it to reflect differential effects from primary and (‘voluntary’ and ‘involuntary’) secondary offers. We further show that after accounting for listing rule effects—which partially drive the choice of the retained equity level in the Hong Kong setting—the equity retention-firm value relation is seen with much greater clarity.In a later stage of analysis we deepen the signal-firm value findings by relating the three signals to post-IPO earnings. We note a positive association between the fraction of equity retained by pre-listing owners and earnings growth. However, this association weakens somewhat beyond the first two accounting year-ends post-listing. Significantly, earnings appreciation appears markedly weaker for issuers going to market with a secondary offer component within their overall IPO. Finally, consistent with Jain and Kini's [1994. The post-operating performance of IPO firms. Journal of Finance, 49(5), 1699–1726] US evidence, IPO underpricing appears to have little or no association with post-listing earnings.     

Low‐Frequency Volatility of Yen Interest Rate Swap Market in Relation to Macroeconomic Risk*

Using ‘low‐frequency’ volatility extracted from aggregate volatility shocks in interest rate swap (hereafter, IRS) market, this paper investigates whether Japanese yen IRS volatility can be explained by macroeconomic risks. The analysis suggests that this low‐frequency yen IRS volatility has strong and positive association with most of the macroeconomic risk proxies (e.g., volatility of consumer price index, industrial production volatility, foreign exchange volatility, slope of the term structure and money supply) with the exception of the unemployment rate, which is negatively related to IRS volatility. This finding is fairly consistent with the argument that the greater the macroeconomic risk the greater is the use of derivative instruments to hedge or speculate. The relationship between the macroeconomic risks and IRS volatility varies slightly across the different swap maturities but is robust to alternative volatility specifications. This linkage between swap market and macroeconomy has practical implications since market makers and hedgers use the swap rate as benchmark for pricing long‐term interest rates, corporate bonds and various other securities.     

Going public: The impact of insiders' holdings on the price of initial public offerings

Many entrepreneurs dream of seeing their company's securities trading in the public marketplace. Although going public has many benefits for a firm's founders and insiders, the process is often confusing and intimidating. One of the questions that investment bankers are asked frequently by insiders is, “What determines the price of a stock in the initial public offering?” This article presents empirical evidence that the stock price in an initial public offering (IPO) is directly related to the percentage of the firm's equity retained by the insiders. In other words, the offering price is relatively high when it appears that the insiders are not “bailing out” when the firm goes public.This research investigates equity ownership structure as a determinant of the pricing of IPOs. The hypothesis to be tested is: IPOs with higher (lower) insider holdings at the time of the offering are priced higher (lower) as a result of lower (higher) required rates of return. Support for the hypothesis is based on agency theory, which postulates that additional risk is created when there is a perceived separation of ownership and control.There are several implications of this research. First, a greater appreciation of the sophistication of the IPO market with regard to the actions of the insiders should be gained. Second, the reader's knowledge of the activity and relative pricing of IPOs during the 1978–1985 time period should be enhanced. Third, insiders should realize that actions regarding their relative equity holdings at the time of the offering have an impact on the price of the offering. Finally, the reader should recognize that even in “hot markets” the actions of insiders at the time of an initial public offering regarding the sale of equity are monitored by the market.     

Optimal Consumption-Portfolio Policies With Habit Formation1

This is a companion paper to the authors ‘Asset Prices in an Exchange Economy with Habit Formation” in Econometrica which focuses on consumption demand and asset pricing when preferences are habit forming. Here we prove existence of optimal consumption-portfolio policies for (i) utility functions for which the marginal cost of consumption (MCC) interacts with the habit formation process and satisfies a recursive integral equation with forward functional Lipschitz integrand and (ii) utilities for which the MCC is independent of the standard of living and satisfies a recursive integral equation with locally Lipschitz integrand. Result (i) is demonstrated here for the first time. Result (ii) is novel and enables us to consider Cobb-Douglas utilities without placing lower bounds on the system of Arrow-Debreu prices. We also review and extend our earlier results in the linear case; in particular, we provide new insights about the structure of optimal portfolios. Additional new features of the model include the possibility of finite marginal utility of consumption at zero and habit formation mechanisms with stochastic coefficients. an extension to a financial market model with general processes is outlined. A byproduct of the analysis is a set of fixed-point theorems for recursive integral equations with forward functional Lipschitz or locally Lipschitz integrands.     

BEHAVIORAL PORTFOLIO SELECTION IN CONTINUOUS TIME

This paper formulates and studies a general continuous-time behavioral portfolio selection model under Kahneman and Tversky's (cumulative) prospect theory, featuring S-shaped utility (value) functions and probability distortions. Unlike the conventional expected utility maximization model, such a behavioral model could be easily mis-formulated (a.k.a. ill-posed) if its different components do not coordinate well with each other. Certain classes of an ill-posed model are identified. A systematic approach, which is fundamentally different from the ones employed for the utility model, is developed to solve a well-posed model, assuming a complete market and general Itô processes for asset prices. The optimal terminal wealth positions, derived in fairly explicit forms, possess surprisingly simple structure reminiscent of a gambling policy betting on a good state of the world while accepting a fixed, known loss in case of a bad one. An example with a two-piece CRRA utility is presented to illustrate the general results obtained, and is solved completely for all admissible parameters. The effect of the behavioral criterion on the risky allocations is finally discussed.     

Market Orientation in the Transition Economies of Central Europe:: Tests of the Narver and Slater Market Orientation Scales

The Narver and Slater (Narver, J.C., and Slater, S.F.: The Effect of Marketing Orientation on Business Profitability. Journal of Marketing 54 (1990): 20–35.) market orientation scale is tested in the context of the transition economies of central Europe and found to be both valid and reliable. Relationships between market orientation and both marketing strategy and performance broadly follow predictions from the Western literature indicating that the adoption of a market orientation is equally applicable in transition as in Western economies. A number of different approaches, however, are evident in the transition economies suggesting that other business orientations may coexist with a market orientation creating a richer and more complex set or organizational drivers.     

Socially Responsible Investors and the Microentrepreneur: A Canadian Case

Socially responsible investors buy financial securities with two goals: to make a market-based return, and to make companies act in a more socially responsible way. Most research on socially responsible investment deals with investing in stocks traded on major exchanges. We add the case of loaning small amounts of funds to microentrepreneurs through a discussion of a particular case. The case is that of Calmeadow which, in conjunction with the Royal Bank of Canada, set up a microlending project in rural Nova Scotia (Canada). Using Hirschman’s analysis of “exit” and “voice”, we show that while socially responsible investors may make market-based returns for their investments in stocks traded on major exchanges, they have no effect on corporate behaviour because their action consists of exit, and they are easily replaced by other investors. They attain their first goal but not their second. On the other hand, in the Calmeadow/Royal Bank of Canada case, we see that those who lend money to microenterprises can more easily use voice. The relative power difference between the lender and the microentrepreneur enables the lender to make the microentrepreneur act in a more socially responsible way, although only marginally. But because of the market imperfections existing in this case (the very high transactions costs associated with administering small loans), the lender concluded it could not attain a market rate of return. In this case, then, the lender attained its second goal but not its first.     

An Economic Approach to Business Ethics: Moral Agency of the Firm and the Enabling and Constraining Effects of Economic Institutions and Interactions in a Market Economy

The paper maps out an alternative to a behavioural (economic) approach to business ethics. Special attention is paid to the fundamental philosophical principle that any moral ‘ought’ implies a practical ‘can’, which the paper interprets with regard to the economic viability of moral agency of the firm under the conditions of the market economy, in particular competition. The paper details an economic understanding of business ethics with regard to classical and neo-classical views, on the one hand, and institutional, libertarian thought, on the other hand. Implications are derived regarding unintentional and passive intentional moral agency of the firm. The paper moves on to suggest that moral agency can be economically viable in competitive ‘market’ interactions, which is conventionally disputed by classical/neo-classical and institutional, libertarian economics. The paper here conceptualises active moral agency of the firm as the utilisation of ethical capital in firm--stakeholder interactions. This yields a reinterpretation of instrumental stakeholder theory.     

Privacy versus accessibility: The impact of situationally conditioned belief

The information age we are living in and the technology that supports it, raises new ethical concerns. Among these concerns are privacy — the rights of individuals to withold information they consider sensitive, and accessibility — the rights of individuals to obtain information that is relevant to the decisions they must make. Arguments about potential impacts of information technology on privacy and accessibility mask and underlying conflict — that one person's beliefs about their right to relevant information is likely to conflict with another person's belief's about their right to withold information they consider sensitive. This paper proposes that the conflict is likely to be a function of the role the individuals plays in the decision making situation — situationally conditioned belief (SCB) — rather than a function of the person's underlying ethical values.This paper presents an empirical study involving information privacy and accessibility in routine business and market decisions, designed to reveal the presence of SCBs. The results indicate that SCBs cause a gap in beliefs about information accessibility and privacy. Impacts of the SCB gap are discussed. A negotiation technique called information exchange is suggested as a means of closing the SCB gap in routine business and market transactions. Dr. Laura Lally received her Ph.D. in Information Systems. Dr. Lally pursues research on the impacts of information technology on a nation's culture, on business profitability, and on the ethical choices faced by individuals. She has published articles in Decision Sciences, the Information Society, the Journal of Global Information Management and in the Journal of End User Computing. She is currently investigating the risk factors involved in process reengineering under a grant from the National Science Foundation.     

Liquidity,exchange listing,and common stock performance

The liquidity of securities—the relationship between volume of trading and changes in market price—has won increasing recognition as an element of investment strategy in recent years. Relatively high liquidity is deemed to be a desirable characteristic of a stock, especially for the institutional investor, who typically trades in large volume. Thus, firms can generally be expected to seek means of enhancing the liquidity of their shares. One of the supposed means of accomplishing this is by listing one's stock on a national securities exchange. This paper examines the relationship of common stock liquidity to both exchange listing and price behavior during major up and down movements in the market. Our conceptual and empirical analyses indicate that liquidity is linked to price behavior; and we suggest that the view held by at least some corporate officers—that exchange listing increases liquidity—may be erroneous. More specifically, it appears that when the amount of firm capitalization is taken into account, exchange listing does not result in greater stock liquidity.