The MSRB announced that it has agreed to provide municipal market data to the Internal Revenue Service in connection with its enforcement of tax laws related to municipal securities. The MSRB regulates the $3.7tn municipal market and currently provides information and data to regulatory authorities that enforce MSRB rules governing municipal market financial professionals.  The new agreement extends the MSRB’s enforcement support to the IRS for its enforcement of federal internal revenue laws related to the municipal securities market. The MSRB will provide the IRS with municipal market data and documents collected through MSRB information systems. Under federal securities law, the MSRB has a statutory mandate to provide enforcement support to regulatory authorities. The MSRB assists authorities that enforce MSRB rules, including the SEC, FINRA and appropriate bank regulators. That assistance includes real-time access to market transactions, training on MSRB rules and data analysis. The MSRB also meets regularly with enforcement authorities to discuss municipal market issues and coordinates on education and outreach activities related to compliance with MSRB rules. [MSRB, 10/24/11]