Anheuser-Busch InBev’s credit rating has been slashed to the lowest tier of investment-grade, according to Moody’s Investors Service, which warned that the company is struggling to reduce its $100bn debt load.

The credit rating firm said it lowered the brewer’s Senior Unsecured debt ratings to Baa1 from A3, putting the company three levels away from junk rating, Moody’s said on Monday.