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Abstract
The authors developed a simple regime-switching model of Hong Kong’s linked exchange rate and provide a formula for its option prices. The formula can be used to back out from option prices the implied risk-neutral probability of the abandonment of Hong Kong’s Linked Exchange Rate System. For the option price data for the period from July 1, 2005, to February 28, 2020, the risk-neutral probability is estimated to have a mean of 9.82%. When contrasted with the fact that Hong Kong’s Linked Exchange Rate System has not failed since 1983, the objective probability of that event is less than 0.1% even for high levels of risk aversion. Their finding suggests that although the abandonment of the Linked Exchange Rate System is a significant risk, it cannot explain the risk premium seen in the option prices.
TOPICS: Currency, derivatives, options
Key Findings
▪ The data on HKD/USD exchange rate option prices are consistent with the view that the current pegged exchange rate regime in Hong Kong is not credible.
▪ The premium implied in the option prices for hedging that risk seems excessively high.
▪ The evidence documented in this article calls for better modeling of how investors formulate their beliefs.
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US and Overseas: +1 646-931-9045
UK: 0207 139 1600