(1)零股；零星股
低于通常交易单位〔unit of trading〕的股票数量：热门股以100股为交易单位，故1至99股为零股；冷门股以10股为交易单位，故1至9股为零股。

(2)零星交易量
低于通常交易单位的交易量。

(3)零股交易

• involuntary plea of guilty
• involuntary self-destruction
• involuntary separation of jury
• involuntary servitude
• involuntary transfer
• involuntary trust
• in withernam
• in witness whereof
• IOLTA
• iota
• IOU
• I promise to pay.
• Ipsae leges cupiunt ut jure regantur.
• Ipsa utilitas justi prope mater et aequi.
• ipse
• ipse dixit
• ipsis faucibus
• ipsissima verba
• ipsissimis verbis
• ipsius patris bene placito
• ipso
• ipso articulo temporis
• ipso facto
• ipso facto et ipso jure
• ipso jure