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After digit-double cuts out long Wednesday, muni yields rose an additional two to four basis points, depending on the curve, on Thursday.

Alaska, California, Hawaii, Washington, Louisiana and New York have the worst-performing, least cost-effective roads and bridges, according to Reason Foundation's latest report.

The Oversight Board's effort to confirm a "a legally infirm cramdown plan is patently flawed and will add years of litigation," the bondholders said.

While the White Lake, Michigan, township hack is the best-known and publicly disclosed cyberattack, there have been others. Some issuers and firms are reluctant to share these experiences publicly.

The U.S. Congress is considering eliminating the federal tax exemption for municipal bonds, the single most important financing tool for cities and towns across America. If they do, the cost of building and maintaining infrastructure — roads, bridges, schools, water systems, and even broadband networks — will skyrocket.

The Southeast has many of the largest ports and cargo airports in the country along with extensive foreign investment that creates exposure to trade turmoil.

"The supply/demand dynamic is a headwind for the muni market this week as supply is expected to be elevated," said Cooper Howard, a fixed income strategist at Charles Schwab.

SEC probe relating to a cyberattack on a Michigan township's bond sale could involve looking into whether investors are getting an accurate picture of the issuer's credit risk, a former SEC enforcement attorney said.

If the seven states dependent on the Colorado River don't craft a new operating agreement, the federal government could end up doing it for them.

A city-created corporation plans to issue bonds for the mass transit project, paid off with a voter-approved hike in the maintenance and operations property tax.