Wall Street regulators are expected to release an update to the Volcker Rule, a key regulation implemented in the wake of the 2008 financial crisis. The rule prevents banks from using their own funds the make the type of risky investments that contributed to the collapse of the financial system in 2008. The updated rule, dubbed "Volcker 2.0," is expected to clarify which short-term investments banks can make with their own money and to what extent banks can invest in hedge funds and private equity firms, according to Bloomberg. Visit the Markets Insider homepage for more stories.