讲个技术性的文章.如何理解short interest. Short interest是指市场上还未被cover的股票.short interest算法是当前卖空股票/total number of shares outstanding.Short interest越多代表市场上做空的人越多.short interest/adv volume可以算出days to cover,也就是这些做空股票平仓需要多少时间.days to cover主要用来测buying pressure.days to cover的数字太大的话,当股票大跌后,会有一个由cover & buy back造成的upward momentum