Treasury Secretary Mnuchin held calls with the CEOs of major banks to discuss the market turmoil

Treasury Secretary Steven Mnuchin held calls on Sunday with the heads of the six largest U.S. banks to shore up confidence in the U.S. financial system amid the recent market turmoil.

"The banks all confirmed ample liquidity is available for lending to consumer and business markets," a statement from the Treasury said.

Mnuchin spoke with J.P. Morgan Chase CEO Jamie Dimon, Bank of America's Brian Moynihan, Goldman Sachs' David Solomon, Morgan Stanley's James Gorman, Tim Sloan of Wells Fargo and Michael Corbat of Citigroup.

"We continue to see strong economic growth in the U.S. economy with robust activity from consumers and business," said Secretary Mnuchin in the statement.

Wells Fargo declined to comment on the calls. The other five banks did not immediately return CNBC's requests for comment.

On Monday, a senior Treasury official, who declined to be named, told CNBC that the purpose of the call and putting out the statement, was a "prudent, preemptive measure" following last week's market volatility. Yet while the moves were intended to be reassuring, they triggered confusion among market watchers.

Mnuchin is dealing with several issues facing investors and the financial system right now:

Read the full statement from the Treasury Department below:

Secretary Mnuchin convened individual calls with the CEOs of the nation's six largest banks

The banks all confirmed ample liquidity is available for lending to consumer and business markets.

Washington - Secretary Mnuchin conducted a series of calls today with the CEOs of the nations six largest banks: Brian Moynihan, Bank of America; Michael Corbat, Citi; David Solomon, Goldman Sachs; Jamie Dimon, JP Morgan Chase, James Gorman, Morgan Stanley; Tim Sloan, Wells Fargo. The CEOs confirmed that they have ample liquidity available for lending to consumer, business markets, and all other market operations. He also confirmed that they have not experienced any clearance or margin issues and that the markets continue to function properly.

Tomorrow, the Secretary will convene a call with the President's Working Group on financial markets, which he chairs. This includes the Board of Governors of the Federal Reserve System, the Securities and Exchange Commission, and the Commodities Futures Trading Commission. He has also invited the office of the Comptroller of the Currency, and the Federal Deposit Insurance Corporation to participate as well. These key regulators will discuss coordination efforts to assure normal market operations.

"We continue to see strong economic growth in the U.S. economy with robust activity from consumers and business," stated Secretary Mnuchin and added "With the government shutdown, Treasury will have critical employees to maintain its core operations at Fiscal Services, IRS, and other critical functions within the department."

-CNBC's Wilfred Frost and Ylan Mui contributed to this report.