Jerome Powell and Janet Yellen
U.S. Federal Reserve Board Chairman Jerome Powell listens as U.S. Treasury Secretary Janet Yellen speaks during a meeting with the Treasury Department's Financial Stability Oversight Council at the U.S. Treasury Department on October 03, 2022 in Washington, DC.
  • The Fed's massive quantitative tightening campaign has had limited effect on the market. 
  • That's as private sector participants have taken over its role in the Treasury market.
  • But banking reserves are still at risk if money market funds stop buying T-bills.

Since the Federal Reserve began cutting down the size of its balance sheet last year, the central bank has allowed about $1 trillion of its debt holdings to run off, but it's so-called quantitative tightening program hasn't rattled the market the way many feared it would.