The State Bank of Vietnam (SBV) stopped issuing T-bills in the open market operation (OMO) channel from November 9.
The move is attributed to an easing of exchange rate pressure.
Since November 1, the SBV has injected funds into the banking system.
During 34 sessions between September 21 and November 8, the central bank offered 28-day treasury bills through auctions, with a total value of nearly VND360.4 trillion ($14.7 billion).
However, between October 19 and November 8, it injected VND165.695 trillion (over $6.8 billion) into the banking system, thus reducing the value of T-bills in circulation to VND194.650 trillion ($8 billion).