等股票涨价后卖掉，赚买卖的差价则是投机性的。
Selling the stock after the price rises and making money from prices fluctuation is speculative.
市场泡沫价格升跌急剧的投机性市场或股票。
Bubble a speculative market or stock in which the values rise very rapidly and then fall sharply.
结果表明，我国A股股票的实际风险溢价为负，股票市场存在较大的投机性泡沫。
Our research showed that the real risk premium of A shares was negative and there speculate bubbles in the Chinese stock market during 1997~2001.
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