tax loss carry forward是什么？

老师 ，你好，有一道题目是Which of the following financial intermediaries is most likely to provide liquidity service to its client? (A)Broker (B)Dealer (C)Exchanges 答案选的是（B）Dealer。在答案中解释道The service that dealers provide is liquidity. Liquidity is the ability to buy or sell with low transaction cost when investors want to trade. By allowing their clients to trade when they want to trade, dealers provide liquidity to them. 但是在我理解看来，Broker也提供了流动性，比如说在古董市场中，交易一般很不活跃，如果有人想要进行交易，买家可能找不到卖家，卖家可能也找不到买家，这时候难道不是需要Broker在当中去撮合两者的交易嘛？在这种情况下，Broker也提供了流动性啊。

老师计算器如何按开3次方根

net revenue和net income区别是什么？ net revenue=？如何计算？

market pricing anomalies 是什么

老师 你好，请问最后一步的反函数 我求不出来，不明白如何得出Ps=1.6+0.04Q

老师,the British pound in terms of U.S. dollars应该是哪个除以哪个?这个答案是不是都反了?

这里的协方差是用什么公式求的

你好老师，请问在期货投资中如何做好仓位管理？

请问这是哪里的知识点，我从来没见过