"Given the role of liquidity problems in the 2008 financial crisis, the Senator has requested responses from Mr. Mnuchin to better understand the risks to the US banking system that triggered his concerns," Senator Elizabeth Warren said in a press release on Friday.
Warren sent letters to Mnuchin and chief executives of Morgan Stanley, Wells Fargo, Goldman Sachs, JP Morgan Chase, Citigroup and Bank of America.
The official wrote that the public announcement of the calls was a rare step for a Treasury Secretary to take.
"Your calls sought to assuage a concern — the liquidity of banks — that neither banking regulators nor executives had publicly indicated was a problem," Warren said.
While Mnuchin’s calls were intended to reassure markets, the initiative apparently backfired, as Warren noted, when the S&P 500 fell 2.7 percent after Mnuchin’s calls.
Warren is seeking a summary of the six calls to the CEOs, including copies of any documentation, notes, or other written analyses produced in conjunction with the call; and copies of all internal and external Treasury Department communications scheduling the call, according to the letter.