单向双向：某些产品的手续费只在开仓时收取，有些则在开仓和平仓时都收取； The Formulation for every financial gain metric on the earnings and decline assertion (P&L) is stated in the next listing: 今日持仓/昨日持仓：中国期货通常指定平今仓和平昨仓来收取不同的费用； The P&L statement—or “Earnings Statement”—is actually a fiscal report that summarizes a selected company’s earnings, expenses... waiting for link from Press Release (104)