Options can make shorting easier , both because options can be a cheaper way of obtaining a short position and because options allow short - sale constrained investors to trade with other investors who have better access to shorting 期权有助于卖空行为，一方面，这是因为期权是一种廉价获得空头头寸的途径；另一方面，期权使卖空能力受到限制的投资者能与其他具有更多卖空能力的投资者进行交易。
It is a of my father common friend , it is a zhang riverside person that likes game , pestering my father to say the thing of the house all the time recently , i am afraid of what not be afraid that he is not himself , be afraid of be afraid of him one room sells more , to moment although we passed door , the person that is decieved then is decieved before us , is that to become invalid completely 是我爸爸的一个普通朋友，是一个喜欢赌博的漳浦人，最近一直缠着我爸爸说房子的事情，我怕倒不怕他不是自己的，怕就怕他一房多卖，到时候即使我们过了户，那受骗的人在我们之前受骗，那岂不是全作废了吗？
On the day that an option has a sharp break after a prolonged decline , if it closes higher than the opening or above the halfway point or better still if it closes at the extreme high , after making a wide range and going lower than the previous day , it is an indication that the buying is better than the selling and that the trend is getting ready to turn up or that a bigger rally may be expected 在一轮长期下跌市中出现一个剧烈下跌的时候，如果当天收盘价高于开盘价，或者收盘价高于当天中价，或者收在最高价上面，在进行宽幅震荡后价格比前几天收低，那么预示买者多卖者，行情准备转势向上或者将会迎来一轮预期的强烈的反弹。
