无法排除这个可能性。这也是一个杠杆不宜开太高的理由。去年美国总统大选期间,IB就把margin requirement调高了35%本来50%的调到67.5%,本来25%的调到33.75%想要进行因子投资的人,我觉得这段podcast值得一看:
https://youtu.be/YsWgWrpzdAM@30:35 Novy-Marx: "I'm willing to believe there are lotsof nickels lying around, and if you are efficient atpicking up nickels it can be worth looking for them.but I don't think there are a lot of hundred dollar billlying around waiting to get picked up."