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63 records from EconBiz based on author Name
1. An Options-Based Analysis of Emerging Market Exchange Rate Expectations : Brazil'S Real Plan, 1994-1997
abstractThis paper uses currency option data from the BMF, the Commodities and Futures exchange in Sao Paulo, Brazil, to investigate market expectations on the Brazilian Real-U.S. dollar exchange rate from October 1994 through July 1997. Using options data, we derive implied probability density functions (PDF) for expected future exchange rates and thus measures of the credibility of the crawling peg' and target zone ( maxiband') regimes governing the exchange rate. Since we do not impose an exchange rate model, our analysis is based on either the risk-neutral PDF or arbitrage-based tests of target zones. The paper one of the first to use options data from an emerging market, finds that target zone credibility was poor prior to February 1996, but improved afterwards. The market anticipated periodic band adjustments, but over time developed greater confidence in the Real. We also test whether devaluation intensities estimated from these option prices can be explained by standard macroeconomic factors
Campa, José Manuel; Chang, P. H. Kevin; Refalo, James F.;2021
Availability: Link
2. Implied Exchange Rate Distributions : Evidence from OTC Option Markets
abstractThis paper uses a rich new data set of option prices on the dollar-mark, dollar-yen, and key EMS cross-rates to extract the entire risk-neutral probability density function (pdf) over horizons of one and three months. We compare three alternative smoothing methods---cubic splines, an implied binomial tree (trimmed and untrimmed), and a mixture of lognormals---for transforming option data into the pdf. Despite their methodological ifferences, the three approaches lead to a similar pdf distinct from the lognormal benchmark, and usually characterized by skewness and leptokurtosis. We then document a striking positive correlation between skewness in these pdfs and the spot rate. The stronger a currency the more expectations are skewed towards a further appreciation of that currency. We interpret this finding as a rejection that these exchange rates evolve as a martingale, or that they follow a credible target zone, explicit or implicit. Instead, this this positive correlation is consistent with target zones with endogenous realignment risk. We discuss two interpretations of our results on skewness: when a currency is stronger, the actual probability of further large appreciation is higher, or because of risk, such states are valued more highly
Campa, José Manuel; Chang, P. H. Kevin; Reider, Robert L.;2018
Availability: Link
3. An Options-Based Analysis of Emerging Market Exchange Rate Expectations : Brazil's Real Plan, 1994-1997
abstractThis paper uses currency option data from the BMF, the Commodities and Futures exchange in Sao Paulo, Brazil, to investigate market expectations on the Brazilian Real-U.S. dollar exchange rate from October 1994 through July 1997. Using options data, we derive implied probability density functions (PDF) for expected future exchange rates and thus measures of the credibility of the crawling peg' and target zone ( maxiband') regimes governing the exchange rate. Since we do not impose an exchange rate model, our analysis is based on either the risk-neutral PDF or arbitrage-based tests of target zones. The paper one of the first to use options data from an emerging market, finds that target zone credibility was poor prior to February 1996, but improved afterwards. The market anticipated periodic band adjustments, but over time developed greater confidence in the Real. We also test whether devaluation intensities estimated from these option prices can be explained by standard macroeconomic factors
Campa, Jose M.; Refalo, James F.; Chang, P.H. Kevin;1999
Availability: Link Link
Citations: 8 (based on OpenCitations)
4. An Options-Based Analysis of Emerging Market Exchange Rate Expectations : Brazil's Real Plan, 1994-1997
abstractThis paper uses currency option data from the BMF, the Commodities and Futures exchange in Sao Paulo, Brazil, to investigate market expectations on the Brazilian Real-U.S. dollar exchange rate from October 1994 through July 1997. Using options data, we derive implied probability density functions (PDF) for expected future exchange rates and thus measures of the credibility of the quot;crawling pegquot; and target zone (quot;maxibandquot;) regimes governing the exchange rate. Since we do not impose an exchange rate model, our analysis is based on either the risk-neutral PDF or arbitrage-based tests of target zones. The paper, one of the first to use options data from an emerging market, finds that target zone credibility was poor prior to February 1996, but improved afterwards. The market anticipated periodic band adjustments, but over time developed greater confidence in the Real. We also test whether devaluation intensities estimated from these option prices can be explained by standard macroeconomic factors
Campa, José Manuel; Chang, P. H. Kevin; Refalo, James F.;2008
Availability: Link
5. The Forecasting Ability of Correlations Implied in Foreign Exchange Options
abstractThis paper evaluates the forecasting accuracy of correlation derived from implied volatilities in dollar-mark, dollar-yen, and mark-yen options from January 1989 to May 1995. As a forecast of realized correlation between the dollar-mark and dollar-yen, implied correlation is compared against three alternative forecasts based on time series data: historical correlation, RiskMetrics' exponentially weighted moving average correlation, and correlation estimated using a bivariate GARCH (1,1) model. At the one-month and three-month forecast horizons, we find that implied correlation outperforms, often significantly, these alternative forecasts. In combinations, implied correlation always incrementally improves the performance of other forecasts, but not the converse; in certain cases historically based forecasts contribute no incremental information to implied forecasts. The superiority of the implied correlation forecast holds even when forecast errors are weighted by realized variances, reflecting correlation's contribution to the dollar variance of a multicurrency portfolio
Campa, José Manuel; Chang, P. H. Kevin;2008
Availability: Link
6. Head and Shoulders : Not Just a Flaky Pattern
abstractThis paper evaluates rigorously the predictive power of the head-and-shoulders pattern as applied to daily exchange rates. Though such visual, nonlinear chart patterns are applied frequently by technical analysts, our paper is one of the first to evaluate the predictive power of such patterns. We apply a trading rule based on the head-and-shoulders pattern to daily exchange rates of major currencies versus the dollar during the floating rate period (from March 1973 to June 1994). We identify head-and-shoulders patterns using an objective, computer-implemented algorithm based on criteria in published technical analysis manuals. The resulting profits, replicable in real-time, are then compared with the distribution of profits for 10,000 simulated series generated with the bootstrap technique under the null hypothesis of a random walk
Osler, Carol L.; Chang, P. H. Kevin;2007
Availability: Link Link
Citations: 41 (based on OpenCitations)
7. Implied Exchange Rate Distributions : Evidence from OTC Option Markets
abstractThis paper uses a rich new data set of option prices on the dollar-mark, dollar-yen, and key EMS cross-rates to extract the entire risk-neutral probability density function (pdf) over horizons of one and three months. We compare three alternative smoothing methods---cubic splines, an implied binomial tree (trimmed and untrimmed), and a mixture of lognormals---for transforming option data into the pdf. Despite their methodological ifferences, the three approaches lead to a similar pdf distinct from the lognormal benchmark, and usually characterized by skewness and leptokurtosis. We then document a striking positive correlation between skewness in these pdfs and the spot rate. The stronger a currency the more expectations are skewed towards a further appreciation of that currency. We interpret this finding as a rejection that these exchange rates evolve as a martingale, or that they follow a credible target zone, explicit or implicit. Instead, this this positive correlation is consistent with target zones with endogenous realignment risk. We discuss two interpretations of our results on skewness: when a currency is stronger, the actual probability of further large appreciation is higher, or because of risk, such states are valued more highly
Campa, Jose M.; Chang, P.H. Kevin; Reider, Robert L.;1997
Availability: Link Link
Citations: 11 (based on OpenCitations)
8. The Forecasting Ability of Correlations Implied in Foreign Exchange Options
abstractThis paper evaluates the forecasting accuracy of correlation derived from implied volatilities in dollar-mark, dollar-yen, and mark-yen options from January 1989 to May 1995. As a forecast of realized correlation between the dollar-mark and dollar-yen, implied correlation is compared against three alternative forecasts based on time series data: historical correlation, RiskMetrics' exponentially weighted moving average correlation, and correlation estimated using a bivariate GARCH (1,1) model. At the one-month and three-month forecast horizons, we find that implied correlation outperforms, often significantly, these alternative forecasts. In combinations, implied correlation always incrementally improves the performance of other forecasts, but not the converse; in certain cases historically based forecasts contribute no incremental information to implied forecasts. The superiority of the implied correlation forecast holds even when forecast errors are weighted by realized variances, reflecting correlation's contribution to the dollar variance of a multicurrency portfolio
Campa, Jose M.; Chang, P. H. Kevin;1997
Availability: Link Link
Citations: 4 (based on OpenCitations)
9. An options-based analysis of emerging market exchange rate expectations : Brazil's Real Plan, 1994-1999
abstractThis paper uses currency option data to investigate market expectations on the Brazilian Real-U.S.Dollar exchange rate from October 1994 through March 1999. The authors derive implied probability density functions for expected future exchange rates and thus measures of the credibility of the "crawling peg" and target zone regimes governing the exchange rate. Target zone credibility was poor prior to February 1996, improved afterwards through September 1997 and later started to worsen again. (DSE/DÜI)
Campa, José Manuel; Chang, P. H. Kevin; Refalo, James F.;2002
Type: Aufsatz in Zeitschrift; Article in journal;
10. A portfolio-based approach to applying and evaluationg currency forecasts : CSFB's recommendations and past performance
Chang, P. H. Kevin; Prendergast, Joe M.;2001