For one, Kraft Heinz announced a trifecta of negative issues.
Weekly high-yield fund flows normalize after prior week's surge.
Corporate bond market runs out of steam midweek.
So far this year, investment-grade and high-yield bond indexes have outpaced government bonds.
The Morningstar Corporate Bond Index tightened 5 basis points last week.
Investors have become increasingly comfortable taking on corporate credit risk.