A sharp rally in Treasury debt prices managed to spur enough investor interest in municipal bonds this week to push yields on The Bond Buyer's indexes modestly lower.

The revenue bond index and the average yield to maturity of the 40 bonds in the Bond Buyer Municipal Bond Index both hit record lows for the second straight week. The revenue bond index, which was introduced September 1979, fell five basis points, to 5.56% from 5.61% last Thursday. The average yield to maturity, which began in January 1985, inched down one basis point, to 5.61% from 5.62%.

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