At the auction, the Treasury received a record $1.57 billion worth of non-competitive bids for the new bills.
In recent months, non-competitive bids for one-year bills have averaged around $500 million.
It was the largest non-competitive bid since the two-year auction held on April 26.
When you make a non-competitive bid, you agree to accept whatever interest rate is decided at the auction.
As measured by the size of non-competitive bids for the new bills, individual interest in the issues was strong.
While not a record, non-competitive bids for the six-month bills were heavy, at $1.4 billion.
Before you buy a bill, you have to decide whether to make a competitive or non-competitive bid.
More impressive than the total ofbids, some analysts said, was the size of the non-competitive bid.
Individual investors and smaller commercial banks placed $565 million worth of non-competitive bids for the issue, the highest total in more than four years.
The Treasury said it received $1.15 billion worth of non-competitive bids for the issue.