senator elizabeth warren a vocal critic of wall street said banks are “undermining” sanctions on russia by loading up on the nation’s corporate debt and suggesting clients buy assets on the cheap in a statement released late friday she called out market makers jpmorgan chase  co and goldman sachs group inc following a bloomberg report that the two banks had been purchasing beatendown bonds jpmorgan analysts also published a note recommending that investors boost holdings of russianlinked debt to take advantage of a “recovery play” stemming from the sell off that has accompanied the country’s invasion of ukraine