感觉不很准确，谢谢了，呵呵

就是类似取整的意思, 这句话的意思是我们想检验卖空的价格是否都在整数或都卖空的股数都在整百手上.

Since in the stock markets in United States, most of them are traded in unit of  round lot(100 shares ), if you look at trade size, most of trades are recorded with shares like 100, 200 etc, except upstair trades which may have very odd number. European market is different, the minimum share may be 1 share.

My guess is that the hypothese is not true at all. Short sales have nothing to do with round prices. Just my 2 cents.