It sold 51 million euros of 12-month bills at a yield of minus 0.32 percent versus minus 0.3 percent in May. It also sold 28 million euros of 6-month bills at minus 0.35 percent versus minus 0.3 percent.

In addition, the country sold 10 million euros worth of 3-month bills at a yield of minus 0.38 percent compared with minus 0.35 percent in May.

Total bids amounted to 482.5 million euros, the ministry said. The next T-bill auction is due on Oct. 3.