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Stocks with large increases in call (put) implied volatilities over the previous month tend to have high (low) future returns. Sorting stocks ranked into decile portfolios by past call implied volatilities produces spreads in average returns of approximately 1% per month, and the return differences persist up to six months. The cross section of stock returns also predicts option implied volatilities, with stocks with high past returns tending to have call and put option contracts that exhibit increases in implied volatility over the next month, but with decreasing realized volatility. These predictability patterns are consistent with rational models of informed trading.  相似文献   
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We study the determinants of the ‘video window’ (the interval between a movie's theatrical and video releases), based on a sample of 1,157 films released on video between 1988 and 1997. For subsets of films having shorter theater run lengths (1 to 17 weeks), windows were generally longer than, and largely invariant to, measures of the time required to exhaust the theater market. One interpretation of our results is that U.S. movie distributors resolved a time consistency problem by coordinating their behavior to maintain longer windows than would have otherwise resulted, but different explanations are also plausible.  相似文献   
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The “annuity puzzle,” conveying the apparently low interest of retirees in longevity insurance, is central to household finance. Two possible explanations are “public care aversion” (PCA), retiree aversion to simultaneously running out of wealth and being in need of long‐term care, and an intentional bequest motive. To disentangle the relative importance of PCA and bequest motive, we estimate a structural model of the retirement phase using a novel survey instrument that includes hypothetical questions. We identify PCA as very significant and find bequest motives that spread deep into the middle class. Our results highlight potential interest in annuities that make allowance for long‐term care expenses.  相似文献   
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There is currently a clear divergence of policy between the United States, Japan and Germany. With the US in recession and concern growing over the severity of the slump, interest rates have been cut in a move to revive the economy. In contrast Japan and Germany are both experiencing strong growth and monetary policy remains tight to combat inflation. This divergence was seen most clearly when the Federal Reserve Board lowered its discount rate to 6 per cent on 1 February, the day after the Bundesbank had raised its Lombard rate to 9 per cent. With G7 increasingly concerned about domestic factors, less emphasis is placed upon stable exchange rates and as a result the dollar is at an all-time low. The last two G7 communiqués have stressed ‘stability oriented monetary policies’, an ambiguous phrase which fails to define ‘stability’ either in terms of exchange rates, inflation or growth. Thus both the German and Japanese policy of high interest rates to reduce inflation and low US interest rates aimed at stimulating the economy can be termed as ‘stability oriented’. This analysis focuses on these divergent policy responses in two alternative scenarios to the world forecast we presented last month. The first scenario considers what might happen if the Federal Reserve Board were to stimulate the US economy by further cuts in interest rates, whilst Japanese and German rates were unchanged in the face of inflationary pressures. This case may be relevant if the recent US loosening of monetary policy is not sufficient to encourage growth because of a ‘credit crunch’, so that a more expansionary policy is required by the Fed. As a consequence, policy diverges further and the dollar weakens. The second scenario focuses upon a reduction in inflationary pressures in Japan and Germany brought about by an oil price fall. In this case we assume that US policy is already loose enough to avoid a prolonged recession, but that German and Japanese monetary policy is relaxed as inflationary forces recede. In this case policies converge. Each scenario thus concentrates on one of !he two features which are causing the policy divergence amongst G3 countries: recession in the US, inflation in Germany and Japan.  相似文献   
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