但是，別的trading firms 還是可以做Prop trading，這些公司的Quant就吃香喝辣了。
"Section 619 of the Dodd-Frank Act, commonly referred to as the Volcker Rule, generally prohibits banking entities from engaging in proprietary trading and from acquiring or retaining ownership interests in, sponsoring, or having certain relationships with a hedge fund or private equity fund."
https://www.fdic.gov/news/fact-sheets/volcker-6-25-20.pdf
