The Ministry of Finance announced on November 17 that it would issue the country's third-ever 50-year national treasury bonds with a yield of 4.4 percent.

With a total face value of 28 billion yuan ($4.22 billion), the bonds were on sale for five days from November 18 and became tradable on November 24, according to a statement on the ministry's website.

China first introduced the 50-year treasury bonds on the interbank market in November 2009 with a 4.3-percent coupon rate.

The country issued the second round of 50-year T-bonds on May 21 this year at a coupon rate of 4.03 percent.