dynamic forecasts of qualitative variables a qual var model of u s recessions this article presents a new qual var model for incorporating information from qualitative and or discrete variables in vector autoregressions with a qual var it is possible to create dynamic forecasts of the qualitative variable using standard var projections previous forecasting methods for qualitative variables in contrast produce only static forecasts i apply the qual var to forecasting the 2001 business recession out of sample and to analyzing the romer and romer narrative measure of monetary policy contractions as an endogenous variable in a var out of sample the model predicts the timing of the 2001 recession quite well relative to the recession probabilities put forth at the time by professional forecasters qual vars which include information about the qualitative variable can also enhance the quality of density forecasts of the other variables in the system

an empirical test of a valuation model for american options on futures contracts pricing models for american call and put options on futures contracts are derived herein these models are used to investigate the efficiency of the market for options on standard poor 500 and german mark futures the evidence presented here indicates that market prices for these options deviate substantially from their corresponding model prices in addition it is shown that a hedging strategy originated at prices that indicate a deviation of market from model is successful in translating the observed mispricing into excess profits after transactions costs however these net profits are eliminated if the origination of the strategy is delayed by one trade or if bid ask spreads are accounted for

environmental labeling and incomplete consumer information in laboratory markets abstract survey evidence suggests that consumers care about the environment and are willing to pay a higher price for a product that generates less environmental harm we induce buyer preferences over quality in a laboratory posted offer market to study sellers incentives to offer products of differing quality buyers are unaware of the product quality before purchase as is often the case for goods with differing environmental quality we first document the market failure that arises from incomplete information when no signaling or reputations are possible we then study various treatments that could remedy this failure seller reputations and unverified cheap talk signals sometimes increase the number of higher valued green goods the only reliable way to improve product quality in the experiment however is to use a third party that charges a fee to certify product quality claims

tests of two models for valuing call options on stocks with dividends roll has recently formulated an option pricing model which allows dividend payments on the underlying stock this paper compares the performance of the exact roll model with a modified but inexact black scholes model the results indicate that the roll model prices are significantly closer to actual market prices

estimating the effects of macroprudential policy shocks a qual var approach this paper proposes a qual var i e a var augmented by qualitative variables to estimate the effects of lowering maximum loan to value ltv ratios a key macroprudential policy tool we use korea as a case study where ltv ratios have been used frequently as a policy instrument the qual var has several advantages over competing methods we conclude that a macroprudential tightening is effective in dampening credit growth and reducing the appreciation of house prices

on jumps in common stock prices and their impact on call option pricing the black scholes call option pricing model exhibits systematic empirical biases the merton call option pricing model which explicitly admits jumps in the underlying security return process may potentially eliminate these biases we provide statistical evidence consistent with the existence of lognormally distributed jumps in a majority of the daily returns of a sample of nyse listed common stocks however we find no operationally significant differences between the black scholes and merton model prices of the call options written on the sampled common stocks

effects and value of verifiable information in a controversial market evidence from lab auctions of genetically modified food food products containing genetically modified gm ingredients have entered the market over the past decade the biotech industry and environmental groups have disseminated conflicting private information about gm foods this paper develops a unique methodology for valuing independent third party information in such a setting and applies this method to consumers willingness to pay for food products that might be gm data are collected from real consumers in an auction market setting with randomized information and labeling treatments the average value of third party information per lab participant is small but the public good value across u s consumers is shown to be quite large jel c91 d12 d82

comparative performance of the black scholes and roll geske whaley option pricing models the original black scholes bs 2 european call option pricing model does not take account of divided payments on the underlying stock and does not allow for the possibility of early exercise that may be optimal when the stock pays dividends black 1 has suggested that the original bs model can be modified to take account of dividends and sharpe 14 predicts that this modified or pseudo american bs approach while not exact is probably sufficient for many listed options

what is an unregulated and potentially misleading label worth the case of natural labelled groceries motivated by a multitude of lawsuits and considerable public policy debate in the u s this study provides insight on the demand effects for an unregulated and potentially misleading phrase found on many grocery labels all natural and its common variations using a targeted sample of adult grocery shoppers we employ an incentive compatible approach to elicit the willingness to pay for a variety of natural labelled food products along with their counterfactual standard labelled counterparts we find that consumers are willing to pay 20 more on average for natural products using elicited information on consumer beliefs we find that this premium decreases when natural signals no artificial flavors or preservatives and increases when consumers believe that natural means gmo free interestingly for those indicating that the natural designation is meaningless they are willing to pay about one third less for products labelled this way

further results on the constant elasticity of variance call option pricing model the black scholes 4 call option model is a member of the class of constant elasticity of variance call option models proposed by cox 6 while the black scholes model assumes that the volatility or instantaneous variance of return is constant through time the other members of the class allow the volatility to change with the stock price this property is of interest because empirical evidence suggests that returns to common stock are heteroscedastic and also that volatilities implied from the black scholes model and market prices of call options are not constant

the valuation of american call options and the expected ex dividend stock price decline abstract this study focuses on the ex dividend stock price decline implicit within the valuation of american call options on dividend paying stocks the roll 1977 american call option pricing formula and the observed structure of cboe call option transaction prices are used to infer the expected ex dividend stock price decline as a proportion of the amount of the dividend the relative decline is shown to be not meaningfully different from one confirming some recent evidence from studies which examined stock prices in the days surrounding ex dividend

unconventional monetary policy and the spillovers to emerging markets abstract unconventional monetary policy such as quantitative easing qe is often considered to have considerable spillover effects on emerging market economies eme aims at quantifying these effects so far mostly use high frequency data around announcement dates panels or var models this paper proposes an alternative way to estimate the effects of qe on emerging markets that allows us to include macroeconomic i e low frequency data together with announcement dates a qual var is estimated that integrates binary information of qe announcements with an otherwise standard var including us and emerging market variables a key advantage is that the model accounts for the endogeneity and forecastability of qe announcements the model uncovers the fed s latent unobservable propensity for qe and generates impulse responses for eme variables to qe shocks the results suggest that qe has significant effects on eme s financial conditions and plays a sizable role in explaining capital inflows equity prices and exchange rates

option pricing when the variance is changing the monte carlo method is used to solve for the price of a call when the variance is changing stochastically

a simple linear weighting scheme for black scholes implied volatilities a note abstract this study presents a piecewise linear weighting function for implied volatilities calculated from black scholes call and put prices a sensitivity analysis is conducted to compare black scholes prices calculated using the weighted implied volatilities to american model prices the analysis indicates that a relatively simple european model can provide close approximations to american prices

bid ask spreads and volatility estimates the implications for option pricing abstract this paper re examines the variance related mispricing exhibited by the black scholes model by accounting for the effects of bid ask spreads on the estimation of the variance of returns on a security it is shown that volatility estimates based on observed sequences of transaction prices overestimate the true volatility of returns on a security with the magnitude of the overestimation being an increasing function of the level of the volatility the paper then provides empirical tests of the proposition that the variance related bias exhibited by the black scholes model is due to this misestimation of volatility the results indicate that although the misestimation is systematically related to the variance it is not of sufficient magnitude to explain the volatility bias exhibited by black scholes model

valuation of american options on foreign currency abstract pricing models for american call and put options on foreign currency are derived herein these models are used to investigate the efficiency of the market for foreign currency options the evidence presented here indicates that market prices for these options deviate substantially from their corresponding model prices in addition it is shown that a hedging strategy executed at transaction prices can be used to translate an observed deviation of market from model prices into positive excess profits however these profits are eliminated if the strategy is executed at bid and offer prices

tests of an american option pricing model on the foreign currency options market this paper tests the ability of the american option pricing model proposed by parkinson 18 or mason 14 to explain the pricing of the foreign currency options traded on the philadelphia stock exchange from february 28 1983 to march 26 1985 we find that the model underprices out of the money options relative to at the money and in the money options this relative underpricing is driven by an underpricing of out of the money call options of short maturity in addition the degree of relative mispricing for most categories of options is shown to be a decreasing function of the time to maturity of the options longer maturity options appear to trade at similar levels of implied volatility whether they are in at or out of the money most of these biases appear consistent with the fact that the underlying spot currency rate follows a mixed jump diffusion process as described in 17

on the striking price bias of the black scholes formula with an estimated variance rate abstract the use of an estimated variance rate in the black scholes formula produces biased estimates of the theoretical price this study analytically examines the bias with respect to moneyness of the option

on the valuation of american call options on stocks with known dividends both the roll and the geske equations for the valuation of the american call option on a stock with known dividends are incorrectly specified this note presents the corrected valuation formula explains the misspecifications and provides a numerical example

macroprudential policy central banks and financial stability evidence from china abstract we study the chinese experience and provide evidence that central banks can play an active role in safeguarding financial stability the narrative approach is used to disentangle macropudential policy actions from monetary actions we show that reserve requirements window guidance supervisory pressure and housing market policies can be used for macroprudential purposes our var estimates suggest that well targeted macroprudential policy has immediate and persistent impact on credit but no statistically significant impact on output macroprudential policy can be used to retain financial stability without triggering an economic slowdown or as a complement to monetary policy to offset the buildup of financial vulnerabilities arising from monetary easing a well designed mix of these two policies helps to achieve both macroeconomic and financial stability objectives which however requires central banks to maintain a multi instrument framework

on valuing american call options with the black scholes european formula empirical papers on option pricing have uncovered systematic differences between market prices and values produced by the black scholes european formula such biases have been found related to the exercise price the time to maturity and the variance we argue here that the american option variant of the black scholes formula has the potential to explain the first two biases and may partly explain the third it can also be used to understand the empirical finding that the striking price bias reverses itself in different sample periods the expected form of the striking price bias is explained in detail and is shown to be closely related to past empirical findings the black scholes european option pricing model tends to exhibit systematic empirical biases when used to value american call options the reported biases

over the counter option market dividend protection and biases in the black scholes model a note most options are traded over the counter otc and are dividend protected the exercise price decreases on the ex date by an amount equal to the dividend this protection completely inhibits the early exercise of american call options nevertheless otc protected options have market values which differ systematically from blackscholes values for european options on non dividend paying stocks the pricing difference is related to both the variance of the underlying stock return and to time until expiration of the option but it is quite small in dollar amount

option pricing and implicit volatilities abstract this paper demonstrates that black scholes implied volatilities can be used to value options in many situations where the assumptions of the black scholes model are violated including i alternative stock processes ii stochastic interest rates and iii market frictions given its computational simplicity this procedure provides an attractive alternative to the more complex models with a direct estimation procedure

the costs of macroprudential policy abstract central banks increasingly rely on macroprudential measures to manage the financial cycle however the effects of such measures on the core objectives of monetary policy to stabilise output and inflation are largely unknown in this paper we quantify the effects of changes in maximum loan to value ltv ratios on output and inflation we rely on a narrative identification approach based on detailed reading of policy makers objectives when implementing the measures we find that over a four year horizon a 10 percentage point decrease in the maximum ltv ratio leads to a 1 1 reduction in output as a rule of thumb the impact of a 10 percentage point ltv tightening can be viewed as roughly comparable to that of a 25 basis point increase in the policy rate however the effects are imprecisely estimated and the effect is only present in emerging market economies we also find that tightening ltv limits has larger economic effects than loosening them at the same time we show that changes in maximum ltv ratios have substantial effects on credit and house price growth using inverse propensity weights to rerandomise ltv actions we show that these effects are likely causal

nonparametric tests of alternative option pricing models using all reported trades and quotes on the 30 most active cboe option classes from august 23 1976 through august 31 1978

payoff dominance vs cognitive transparency in decision making i introduction there is a general question about how well laboratory markets work in eliciting true preferences given the low opportunity costs of making errors as in harrison 1989 vernon smith 1982 set out a series of conditions that must be adhered to if a laboratory market investigation is to provide insight into economic behavior in naturally occurring markets the opportunity cost question posed above is covered under smith s payoff dominance and reward saliency precepts for laboratory market experiments if the experimental setting is to elicit true preferences from the subjects the monetary payoffs in the experiment must be salient and dominate potential extraneous influences on subject behavior this paper reports on three series of experiments which employ the becker degroot marshak bdm mechanism to investigate the interaction between payoff dominance reward saliency and cognitive effort in the decision task the bdm mechanism is well suited to this task because it involves only individual choice is theoretically incentive compatible and offers a high degree of experimenter control over payoffs initial information and feedback on the results of decisions becker degroot and marschak 1964 introduced the following preference elicitation mechanism individuals state the most they would be willing to pay wtp 1 for a good then a random price is drawn from a distribution known to the individuals if the stated value is greater than or equal to the random price the individual buys the good at the randomly determined price otherwise the individual does not buy the good the bdm bidding mechanism can be shown to be incentive compatible the intuition is straightforward it is not in the individual s interest to understate true wtp if the random buying price falls between the stated wtp and the true wtp the individual has foregone a beneficial trade it is also not in an individual s interest to overstate true wtp if the random buying price is greater than the true value but less than the stated value the individual will be required to buy the good at a price greater than true wtp a more formal proof is easy to construct 2 let v the true value of one unit of the auction good b the bid submitted to purchase one unit of the good r the price randomly determined to be paid if the good is purchased p r probability that price r is randomly selected y sup o initial income u y utility a function of money income and the value of the good and e initial monetary balance provided in an experiment in the wtp version of the bdm auction the good is purchased if b greater than or equal to r with the subject paying only r and not purchased if b less than r in experiments using the bdm the subject cannot bid more than the experimental balance e so it must be that v less than e if the experiment is to be demand revealing assuming that subjects maximize expected utility they will submit bid b that maximizes eu integral of p r u y sup o e v r dr between limits b and 0 integral of p r u y sup o e dr between limits e and b the first integral describes the expected payoff for random prices r below the bid b and the second integral describes the expected payoff for random prices between the bid b and the maximum possible bid as limited by the balance e the maximum over b occurs when the derivative of eu with respect to b is zero in other words when deu db p b u y e v b u y e 0 so long as p b greater than 0 i e there is some probability the offered bid will be the price the above implies that the maximum occurs when b v in other words it is individually optimal to submit a bid b equal to one s true value v for the commodity although the bdm is incentive compatible in theory it is an empirical question whether it has this property in practice

valuation of american call options on dividend paying stocks empirical tests abstract this paper examines the pricing performance of the valuation equation for american call options on stocks with known dividends and compares it with two suggested approximation methods the approximation obtained by substituting the stock price net of the present value of the escrowed dividends into the black scholes model is shown to induce spurious correlation between prediction error and 1 the standard deviation of stock return 2 the degree to which the option is in the money or out of the money 3 the probability of early exercise 4 the time to expiration of the option and 5 the dividend yield of the stock a new method of examining option market efficiency is developed and tested