ABNâs should be executed when: 1  Tests(s) are deemed by the NCD policy as not medically necessary. 2  Screening test(s) that are part of a routine examination where the patient shows no signs nor symptoms of disease. 3  Test(s) that exceed the NCC frequency limits.
Under rules governing municipal bonds, callable premium bonds must be priced to the date resulting in the worst (lowest) yield for the investor. Generally this means that the bonds are priced to the first call date. This is attractive to investors because, in the event the bonds are not called, the yield to maturity will be much higher. Furthermore, in a rising rate environment, premium bonds retain their value better than par or discount bonds.
Rates Over Time - Interest Rate Trends. The following graphs set forth information relating to municipal bond yields (interest rates) trends. Four of the graphs are based on The Bond Buyer 20-Bond GO Index. The 20-Bond GO Index is based on an average of certain general obligation municipal bonds maturing in 20 years and having an average rating equivalent of Moody's Aa2 and Standard & Poor's AA.