THE IMPACT OF CREDITWATCH PLACEMENT ON EQUITY RETURNS AND BOND PRICES

This paper examines the equity returns and bond prices of firms around the dates of their placement on CreditWatch by Standard and Poor's. Bond prices and equity returns for companies listed on CreditWatch are compared with a set of firms whose debt was rerated during the same time period but were never placed on CreditWatch. The evidence indicates no market reaction when firms are listed on CreditWatch with subsequent rating affirmations, but a significant reaction exists in those cases where the listing was followed by downgradings. Furthermore, the bond market does not appear so efficient as the stock market since relative bond prices continue to decline as long as seven months after a rating change.     

BOND PORTFOLIO IMMUNIZATION: TESTS OF MATURITY, ONE- AND TWO-FACTOR DURATION MATCHING STRATEGIES

This paper provides additional evidence on the usefulness of duration as a strategy tool by developing a two-factor duration model and by using a reasonably reliable database to compare empirically the relative performance of maturity, one-factor duration, and two-factor duration matching strategies in immunizing portfolios of default-free and option-free bonds against interest rate risk. The results suggest that, on average, duration models, even for arbitrarily assumed simple stochastic processes, are more accurate than maturity models and that increased accuracy may be achieved by increasing the length of the planning period and the number of factors in the model.     

ON COMPUTING BOND RETURNS: THE EVALUATION OF LOW-GRADE DEBT

Previous research attributes disparities in the reported performance of junk bonds to differences in bond issues and time periods. The potential effect of apparently subtle differences in methodology is overlooked. We find that the methodologies used in computing performance vary significantly across representative junk bond studies. The differences in methodology can induce dramatic differences in reported performance, even with identical price data. These findings lead to the conjecture that the entire junk bond controversy might never have occurred had bond portfolio returns been computed consistent with the well-established computations of stock returns.     

PRICING CURRENCY OPTIONS UNDER STOCHASTIC INTEREST RATES AND JUMP‐DIFFUSION PROCESSES

We investigate the effects of stochastic interest rates and jumps in the spot exchange rate on the pricing of currency futures, forwards, and futures options. The proposed model extends Bates's model by allowing both the domestic and foreign interest rates to move around randomly, in a generalized Vasicek term‐structure framework. Numerical examples show that the model prices of European currency futures options are similar to those given by Bates's and Black's models in the absence of jumps and when the volatilities of the domestic and foreign interest rates and futures price are negligible. Changes in these volatilities affect the futures options prices. Bates's and Black's models underprice the European currency futures options in both the presence and the absence of jumps. The mispricing increases with the volatilities of interest rates and futures prices. JEL classification: G13     

ESTIMATING RETURNS ON FINANCIAL INSTRUMENTS — STOCHASTIC ANALYSIS

The present paper addresses the problem of estimating returns on financial instruments when there is incomplete information about the instrument's cash flows. However unlike previous work in this area, it is assumed that the financial instrument's cash flows may be modelled as a stochastic function of time. This implies that the estimation error is a random variable and as a consequence, probability assessments can be made as to its likely magnitude. Using these procedures it is shown that traditional estimating methods considerably overstate actual returns. Further, it is also shown that returns are far from normally distributed. Given these results, it is doubtful whether any credibility can be attached to the standard two parameter methods of evaluating investment performance.     

OPENING RETURNS,NOISE, AND OVERREACTION

In this article a partial‐adjustment model, which shows how equity prices fail to adjust instantaneously to new information, is estimated using a Kalman filter. For the components of the Dow Jones Industrial 30 index I aim to identify whether overreaction or noise is the cause of serial correlation and high volatility associated with opening returns. I find that the tendency for overreaction in opening prices is much stronger than for closing prices; therefore, overreaction rather than noise may account for differences in the return behavior of opening and closing returns. JEL classification: G15     

THE VALUATION OF CURRENCY OPTIONS FOR ALTERNATE STOCHASTIC PROCESSES

This paper compares the ability of four valuation models — the Pure Diffusion model of Black-Scholes-Merton, the Absolute Diffusion and Pure Jump models of Cox-Ross, and the mixed Jump-Diffusion model of Merton — to explain the observed behavior of market prices of foreign currency options. The empirical tests are based on a comparison of the pattern of implied volatilities obtained from option market prices and the Black-Scholes-Merton model with those expected theoretically if exchange rates follow the four stochastic processes specified above. The results of the comparison show that the pattern of implied volatilities is most consistent with the mixed Jump-Diffusion model.     

PE RATIOS,EARNINGS EXPECTATIONS,AND ABNORMAL RETURNS

This study provides evidence that the price-earnings (PE) ratio effect is not homogeneous across firms with similar PE ratios. Instead, firms with the lowest PE ratios and those with the lowest expected annual earnings per share outperform all other groups in January. These results can be partially attributed to security analysts consistently underestimating reported earnings of firms with the lowest level of expected earnings and the lowest PE ratios. A negative October effect is also found for the same-firms, which appears to be caused by downward revisions in analysts' forecasts between September 16 and November 16.