investment-grade debt
noun[U]
FINANCEukusthetypeofbondor otherloanthat has alowriskof not beingpaidback:
Thecompanyin Maysold$3.5billionofbondsin arecordinvestment-gradedebtsale, and thenissued$1.5billionmore amonthlater.
It isfearedthat thecompanywilllosethecriticalinvestment-gradedebtratingfrom at least oneratingagency.