 Moodys Investors Service, Moodys today changed Altera Infrastructure L.P.s Altera Infrastructure Speculative Grade Liquidity SGL Rating to SGL-4 from SGL-3 and will subsequently withdraw the SGL rating. On 31 March 2020, Moodys downgraded Altera Infrastructures CFR to Caa1 from B3 and assigned PDR of Caa1-PD, respectively. 