Primary bond market

Charlotte will sell $330 million of bonds and Duke Health will offer $540 million.

Muni yields remain attractive, said Tom Kozlik, managing director, head of public policy and municipal strategy at HilltopSecurities.

Harvard University's ongoing legal battles and the return to market by Chicago's Regional Transportation Authority lead a host of municipal topics in April.

Focus was on the primary market last week, with Birch Creek reporting that one dealer estimated that 90% of the focus earlier in the week was on new issues.

"For munis, a strong jobs report should reverse recent credit spread widening, while a weak jobs report should keep credit spreads around current levels," said BofA strategists.

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.