complete separation of investment banking—the activities of underwriting and dealing with stocks and debt—from deposit taking. Consistently weakened from the 1980s onward, Glass-Steagall was fully repealed in the late 1990s to allow Citicorp to merge with an insurance company.

The Volcker Rule seeks to keep activities essential to banking within a safety net, while excluding other, riskier, activities from this safety net. There are a variety of special regulations, and protections, banks get, ranging from federal deposit insurance (known as FDIC) to access to the Federal Reserve’s discount borrowing window, designed to keep the system working through panics. Banks currently engage in a wide variety of non-banking activities with safety net protection. For example, they speculate in currencies and run hedge funds and proprietary trading desks for their own benefit. These activities made the financial crisis worse; one estimate has the major Wall Street firms suffering $230 billion dollars in prop trading losses a year into the crisis. And right now, these activities are subsidized by access to the banking safety net.

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