Primary bond market

Compensation played a role in the departures, sources said.

Some of the issuance stems from project finance largely "drying up" because of where rates are, said Jennifer Johnston, senior vice president and director of research, municipal bonds, for Franklin Templeton Fixed Income. 

The $350 million revenue bond issue will refund bonds sold in 2015 and finance improvements to the airline's primary maintenance facility in Tulsa, Oklahoma.

The $500 million deal was delayed after the tariff announcement rocked the markets. It has priced, but offering documents include new trade war disclosures.

The market has seen seven consecutive weeks of outflows. "This is not surprising given that retail investors tend to follow performance," said Daryl Clements of AllianceBernstein.

The coming fiscal year will have more than 10 times the state bonding as the current fiscal year.

"Easing tariffs, a slowing economy and an improved supply/demand outlook for munis in May and onward should drive muni market pricing going forward," BofA strategists said.

Investors pulled $397.4 million from municipal bond mutual funds in the week ended Wednesday, following $1.258 billion of outflows the prior week.

The commission also approved converting a GO bond sale from competitive to negotiated.

The market is still in a negative technical period, said Chris Eustance, a portfolio manager at Morgan Stanley Investment Management.