Its A-minus rating just makes investment grade, but Aetna is a huge generator of free cash flow.

FORBES: Magazine Article

The earnings-quality grade rewards companies for having high sums of operating and investing cash flow relative to reported earnings (Cisco).

FORBES: A Matter of Trust

Nahanni is one of scores of similar transactions Enron executives allegedly used to disguise the growing gap between reported earnings and cash flow in the late 1990s which, if disclosed, would have threatened its investment-grade bond rating.

FORBES: Magazine Article