蒋干的经历告诉我们：证券市场上，庄家放出的利好，一般都是为了套你。
Jiang Gan experience tells us: the stock market, the banker emit positive, generally in order to suit you.
第一项措施就是差价——庄家愿意买卖有价证券的价之间的差距。
The first is the bid-offer spread—the difference between the prices at which market makers are willing to buy and sell securities.
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