Volcker Rule Shift Lets Banks Continue Muni Bond Speculation

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U.S. financial regulations that curb banks’ ability to speculate with their own money included an exemption for the $3.7 trillion municipal bond market after issuers complained the rules could increase borrowing costs.

The Volcker Rule, issued today by regulators, allows banks to invest in securities issued by states, localities and government agencies. A draft version would have barred the practice with debt sold by agencies and authorities. The Municipal Securities Rulemaking Board has estimated that such issuers account for about 40 percent of municipal bonds.