CHICAGO -- Weekly reporting municipal bond mutual funds had a net inflow of $815 million during the period ending May 21, AMG Data Services reported.

The results were an increase from a $695 million inflow the previous week, and represent the 18th inflow in the last 19 weeks, according to the Arcata, Calif.-based fund tracker. The category represents about 73% of all muni bond funds because it excludes those that report monthly.

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