The 6-month yield fell 33 basis points to 11.77 percent and the 12-month yield fell 19 basis points to 12.48 percent.
The debt office said it sold 18.9 billion rupees of bills to the market after offering 15.0 billion in maturing securities for roll-over.
Auction yields of Treasuries have been falling steadily since the second week of September.
The 3-month yield has fallen 81 basis points, the 6-month yield 135 basis points and the 12-month yield 1.07 percent.
Treasuries yields are quoted after deducting a 10 percent withholding tax.