A -- Bearer from bond B -- Certificate bond
C -- Gross settlement D -- Issue volume
E -- Net settlement F -- OTC market
G -- Physical bond H -- Real time settlement
I -- Registered bond J -- Replacement cost risk
K -- Securities loan L -- Short term bills
M -- Tendering system N -- Tradable bond
O -- Trade by trade settlement P -- Untimely delivery risk ( )短期国债 ( )发行量