As noted in a letter last week to Mary Schapiro, chairman of the Securities and Exchange Commission, Nasdaq OMX has been examining questions related to the increasing prevalence of “flash” order types in the cash equities market, as well as a related trend in US markets towards “darkness” – activity or orders not transparent to the full market.
我们在上周致美国证券交易委员会(SEC)主席玛丽•夏皮罗(Mary Schapiro)的信中表明，纳斯达克OMX(Nasdaq OMX)一直在研究与以下现象相关的问题：“闪电指令”(flash order)在现货证券交易市场日益流行，及美国市场向着“黑箱操作”(darkness)发展的相关趋势。所谓黑箱操作，是指不对整个市场公开的活动或指令。
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