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A bond index or bond market index is a method of measuring the value of a section of the bond market. It is computed from the prices of selected bonds (typically a weighted average). It is a tool used by investors and financial managers to describe the market, and to compare the return on specific investments. An index is a mathematical construct, so it may not be invested in directly. But many mutual funds and exchange-traded funds attempt to "track" an index (see index fund), and those funds that do not may be judged against those that do. ==Types of indices== Bond indices can be categorized based on their broad characteristics, such as whether they are composed of government bonds, municipal bonds, corporate bonds, high-yield bonds, mortgage-backed securities, syndicated or leveraged loans, etc. They can also be classified based on their credit rating or maturity. Bond indices tend to be total rate-of-return indices and are used mostly as such: to look at performance of a market over time. In addition to returns, bond indices generally also have yield, duration, and convexity, which is aggregated up from individual bonds. Bond indices generally include more individual securities than stock market indices do, and are broader and more rule-based. This allows portfolio managers to predict which type of issues will be eligible for the index. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bond market index」の詳細全文を読む スポンサード リンク
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