他在九月底买入了惠普的股份，赌定股市一定会出现过度反应。
He bought shares in late September, betting on a market overreaction.
对好消息反应延迟且逆向反应，对坏消息反应过度，这反映出中国股市“杠杆效应”的存在。
There is delay reaction and converse reaction to good news and overreaction to bad news. These phenomena show the existence of leverage effect in China stock market.
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