✒ One unintended consequences of quantitative easing is the issuance of trillions of bonds by US companies in the BBB-rated category.

Buyers searching for yield pile heavily into lower rated — but are still investment grade — debts. As a result of such surging demand, some of these “prospective fallen-angels” have even lower borrowing than other high-rated companies.

This created an ideal environment for prospective fallen angels to meet the demand by issuing bonds to finance mergers & acquisitions. By presenting rosy forecasts about synergy and growth, BBB acquirers promise cost savings to pay off debt thus avoiding a downgrade.

The Fed researchers found that confidence was often misplaced. BBB acquirers regularly paid so much for targets that their credit metrics fell into junk territory. However, rating agencies remained lenient and resisted downgrading companies to this “fallen angel” status.