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Using 5-minute high frequency data from the Chinese stock market, we employ a non-parametric method to estimate Fama-French portfolio realized jumps and investigate whether the estimated positive, negative and sign realized jumps could forecast or explain the cross-sectional stock returns. The Fama-MacBeth regression results show that not only have the realized jump components and the continuous volatility been compensated with risk premium, but also that the negative jump risk, the positive jump risk and the sign jump risk, to some extent, could explain the return of the stock portfolios. Therefore, we should pay high attention to the downside tail risk and the upside tail risk. [ABSTRACT FROM AUTHOR]

Does the rate of return from the Chinese real estate industry correlate with the intensity of competition among real estate firms? If China’s equity market performs efficiently, the rates of return of real estate firms should vary indirectly with their level of monopoly power. Greater monopoly power reduces earnings risk and leads to lower costs of capital. The authors analyze empirical evidence and indicate no relationship exists between returns and competition. Speculation may induce stock prices to deviate from normal values. Because normal values assume no speculation, Chinese markets are not likely to be economically efficient. [ABSTRACT FROM PUBLISHER]