The delivery of a type of these things can be postponed via a “wild card option,” which gives parties a few extra hours. Between 1877 and 1930 in the US, consols were examples of the “perpetual” type of these things. TIPS are an inflation-indexed example of these things, adjusted based on the CPI. Using an overlapping-generation model, Robert Barro determined these things should not be perceived as net wealth. Interest payments received by holders of these assets are called coupons. (10[1])To increase liquidity, central banks purchase long-term examples (10[1])of these assets in quantitative easing. Series EE and Series I (“eye”) types of these assets are issued by the Treasury. For 10 points, what securities issued by the government are often considered less risky than stocks? ■END■