然而无论从历史角度或是眼前的趋势，都可以看到这一投资者应该加以防备的另类可能性。
But history and current trends suggest a different possibility that investors should prepare for.
另类交易系统都是由经纪人或经销商运营的。他们主要服务于大的投资者，如退休基金，大学和金融公司。
Alternative trading systems are operated by brokers or dealers. They mainly serve big investors like retirement funds, universities and financial companies.
另类交易系统都是由经纪人或经销商运营的。他们主要服务于大的投资者，如退休基金，大学和金融公司。
Alternative trading systems are operated by brokers or dealers. They mainly serve big investors like retirement funds, universities and financial companies.
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