With the threat of an increase in interest rates, it appears to be a good time for borrowers to lock on interest rates for a long time. TTUN is the latest to do so, issuing $1.2 billion worth of century bonds, that is bonds with a 100-year maturity, at a coupon rate of 4.45 percent. At the same time, TTUN issued $800 million of 30-year maturity bonds at 3.5 percent. Other Big Ten universities, including the University of Minnesota, Michigan State University, Rutgers University, and THE Ohio State University have issued century bonds in recent years.