Answer:
Thursday following the auction date
Explanation:
Treasury bills are instruments used by government to control liquidity in the economy by mopping up excess cash. They are secure government investments that are interest bearing.
T-bills are usually announced on Thursday, actioned on Tuesdays, and issued on the Thursday after auction.
So if the customer places a bid of $10,000,000 for the T-bills on auction day on Tuesday, the settlement of the transaction will occur on the Thursday following the auction date.