从期权数据推断金融泡沫
Inferring Financial Bubbles from Option Data
作者:
Robert A. Jarrow
Simon S. Kwok
Financial bubbles arise when the underlying assetís market price departs from itsfundamental value. Unlike other bubble tests that use time series data and assume areduced-form price process, we infer the existence of bubbles nonparametrically usingoption price data. Under no-arbitrage and acknowledging data constraints, we can partially identify asset price bubbles using a cross section of European option prices. In theempirical analysis, we obtain interval estimates of price bubbles embedded in the S&P500 Index. The estimated index bubbles are then used to construct proÖtable momentumtrading strategies that consistently outperform a buy-and-hold trading strategy
当基础资产的市场价格偏离其基本价值时,就会出现金融泡沫。与使用时间序列数据并采用简化价格过程的其他泡沫测试不同,我们使用期权价格数据非参数地推断泡沫的存在。在无套利和承认数据约束的情况下,我们可以使用欧洲期权价格的横截面部分地识别资产价格泡沫。在实证分析中,我们获得了标普500指数中嵌入的价格泡沫的区间估计。然后,将估计的指数泡沫用于构造可获利的动量交易策略,该策略始终优于买入并持有的交易策略。


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