一、无操作原则。目前， 99％的股民买卖股票的准则是凭感觉和听消息，无自己的买卖原则。短线变中线、中线变长线，最终导致深套。 　　二、不懂得空仓。目前沪深股市除了申新族外， 90％以上的股民一年内没有空仓的时间，相反，满仓者却不在少数。一旦套牢，即使出现底部， First, no principle of operation. At present, 99% of the investors to buy and sell stocks is based on the feeling and listen to the news, without their own trading principles. Short-term change in the midline, midline variable line, eventually lead to deep. Second, do not know short positions. At present, Shanghai and Shenzhen stock markets in addition to the Shen family, more than 90% of the investors within a year no short time, on the contrary, filled positions are not unusual. Once stuck, even if the bottom appears,