The government will sell the 4 percent March 2014 OLO (linear bond) , the 4.25 percent Sept. 2021 bond and the 5 percent March 2035 bond on Aug 22.

All three bonds mature on the 28th of the given month.

The Belgian debt agency will announce the target range for the amount it intends to raise on Friday.

Belgium has so far raised almost 29 billion euros in bond issues this year, compared with the target of 34 billion euros it has set for the whole of 2011.

However, Belgium's debt agency raised significantly more than targeted in 2010 to pre-finance requirements for this year.

The failure to form a new government since last June's election and a public sector debt burden close to 100 percent combined with the euro zone debt crisis have pushed the premium investors demand to hold 10-year Belgian debt over German bunds to around 1.7 percentage points.

Copyright Reuters, 2011