Recent junk-rated issuers include Royal Caribbean Cruises and SeaWorld.
The company will use the proceeds to repay outstanding debt.
Risk appetites are shifting towards bonds increasingly farther down the credit quality spectrum.
The market hasn't yet adjusted for emerging risks, the portfolio manager said.
It’s the seventh largest flow into the asset class and the biggest since June.
U.S. junk bond funds could see the fifth-largest exit on record as investors reassess risk.
The inflows began after the Federal Reserve’s move to buy corporate bonds on March 23.
The airline sweetened the yield on a $2.25 billion junk-bond sale after investors expressed concerns about the fleet.
The benchmark junk bond index posted a 3.12% loss on Monday, its biggest one-day decline since 2008.
The estimates reflect slower anticipated economic growth next year.