送交者: Enlighten 于 2008-10-07, 16:29:33:

回答: there's a bid-ask spread. when more people sell than buy, 由 Enlighten 于 2008-10-07, 16:28:53:

• correction again, bid-ask is the profit for the middle men. - Enlighten (191 bytes) 2008-10-07, 16:39:43 (265172)

加跟贴