TBSP.Index is Poland’s First Official Treasury Bonds Index. TBSP.Index is a total return index which includes the bond price performance, accrued interest, and revenue from reinvested coupons. The index portfolio comprises zero coupon bonds and fixed rate bonds denominated in Polish zlotys. The index is calculated on the basis of reference prices determined in accordance with the prices for determining these prices on the Treasury BondSpot Poland market operated by BondSpot S.A. The index base date is 29 December 2006 and the index base value is 1000 points.